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Discover Life 28 kinds match:
Osmia albiventris  [popup] male
Osmia atriventris  [popup] male
Osmia bucephala  [popup] male
Osmia caerulescens  [popup] male
Osmia chalybea  [popup] male
Osmia collinsiae  [popup] male
Osmia conjuncta  [popup] male
Osmia cordata  [popup] male
Osmia cornifrons  [popup] male
Osmia distincta  [popup] male
Osmia felti  [popup] male
Osmia georgica  [popup] male
Osmia illinoensis  [popup] male
Osmia inermis  [popup] male
Osmia inspergens  [popup] male
Osmia lignaria  [popup] male
Osmia michiganensis  [popup] male
Osmia nigriventris  [popup] male
Osmia proxima  [popup] male
Osmia pumila  [popup] male
Osmia sandhouseae  [popup] male
Osmia simillima  [popup] male
Osmia subaustralis  [popup] male
Osmia subfasciata  [popup] male
Osmia taurus  [popup] male
Osmia tersula  [popup] male
Osmia texana  [popup] male
Osmia virga  [popup] male


REMAINING (number with state)
Abdomen, S4, form of rim, best seen when viewed edge on - Warning can be tricky initially to visualize
 Edge single in its entirety (25)
 Lateral edges with two distinct, though only slightly separated, rims, merging into a single rim towards the center (4)
Abdomen, S4, hairs on CENTRAL rim/plate area, color and shape - Some shape variations are subtle, LOOK CLOSELY
 Light, hairs gently curved or straight (22)
 Light, hairs bent at tip (6)
 Dark, hairs straight or gently curved (4)
 Light,hairs straight with a partial s-curve at tip (4)
 Dark, hairs both straight and sharply bent at tips (3)
 Largely hairless (3)
 Light, hairs on rim straight or gently curved, hairs in center of plate near the rim velcro-like (3)
 Dark central hairs with light surrounding hairs, straight or gently curved (1)
 Dark, hairs straight with a partial s-curve at tip (1)
Abdomen, S4, longitudinal median furrow, may be a trench or a only straight line slightly depressed but still distinct
 Absent (24)
 Present (4)
Abdomen, T2, width of the unpitted border along rim
 Narrow - Less than 1/6 the median width of segment (22)
 Wide - Nearly 1/6 or more the median width of each segment (9)
Abdomen, T6, rim outline - Make sure you are looking at T6, not T7
 Notched in the center (19)
 Unnotched or otherwise modified, smoothly convex across entire rim (9)
 Center is smoothly convex, on either side are 2 very large, rounded lobes (2)
 Center is smoothly convex, on either side are 2 large, acute, pointed teeth (1)
Abdomen, T7, rim outline - May be covered by T6, best viewed from underneath
 Notched in center (22)
 Unnotched, evenly curved across entire rim (4)
Body, color of integument
 Blue, purple, or dull green with metallic reflections (26)
 Black, no metallic reflections (4)
 Black with metallic reflections (3)
 Brilliant green with bluish metallic reflections (1)
Head, antennae, middle segments, length
 Less than twice as long as wide (24)
 At least twice as long as wide (6)
Head, median ocellus, distance to vertex vs distance to eye
 Distance to vertex distinctly less (5)
 Distance to vertex about equal or greater (4)
Hind legs, basitarsi, small spine or tooth - Located on underside within the dense brush of hair, about a third of the way from the apical near, but not on the anterior edge - Can be VERY hard to see, look closely, if you don t have a lot of experience with this character then we suggest that you DON T use this character if you DON T see a spine
 Absent (17)
 Present, may be minute (15)
O cornifrons vs. O. lignaria vs. O. taurus
 O. cornifrons - Head, clypeus apical rim, the central straight portion, shiny area forming a narrow, unpitted uniform band across the front of the clypeus, usually extending to the far sides, except in a few individuals which may have scattered pits on the far sides - Clypeus, hair color, white with a few black hairs on the sides - Thorax, scutum and scutellum,, with scattered black hairs intermixed, however these are sometimes absent - Abdomen, T1 and T2, hair color, off-white to tan (1)
 O. lignaria - Head, clypeus, hair color, ENTIRELY WHITE - Thorax, scutum and scutellum, hair color, BRIGHT WHITE, may or may not have black hairs intermixed - Abdomen, T1 and T2, hair color, BRIGHT WHITE, may or may not have black hairs intermixed (1)
 O. taurus - Head, clypeus apical rim, the central straight portion, very shiny and unpitted in the center, but at the far edges of the rim before it curves back towards the head, this rim is invaded by the same pattern of heavy pits and roughness found throughout the rest of the clypeus this roughness usually extends near but not quite to the rim, thus the shiny unpitted portion of the rim forms a SEMI-CIRCLE rather than a uniform band as in O. cornifrons - Clypeus, hair color, white with scattered dark hairs on the far sides - Thorax, scutum and scutellum, hair color, clearly ORANGE to burn sienna, no black hairs intermixed - Abdomen, T1 and T2, hair color, clearly ORANGE to burn sienna, no black hairs intermixed, note that older specimens can have hair color faded to off white and are often difficult to differentiate from O. cornifrons (1)
O. albiventris vs. O. pumila
 O. albiventris - Abdomen, S3, with hairs filling the strong concave emargination in the center of the rim, the central hairs of which are UNUSUALLY LONG and a few extend half again beyond the edge of the sternite - S4, with long gently wavy white hair in the median portion of the segment - Fore wing, second recurrent vein intersects with the second submarginal cell about 2 vein widths from the tip - Leg, rear basitarsi, with tooth on the anterior edge not much more than a LOW MOUND - Abdomen, T3-6, white hairs on the far sides, in comparison with O. pumila, LONGER (1)
 O. pumila - Abdomen, S3, with hairs filling the strong concave emargination in the center of the rim, but these hairs NOT EXTENDING beyond the edge of the sternite or if they do only by a very little bit - S4, with long white hair in the median portion of the segment that is gently curved or hooked at the end - Fore wing, second recurrent vein USUALLY intersects with the second submarginal cell about 4 vein widths or more from the tip - Leg, rear basitarsi, with tooth on the anterior edge, while quite small, has a CLEAR PROJECTION or tip - Abdomen, T3-6, white hairs on the far sides, in comparison with O. albiventris, SHORTER (1)
O. atriventris vs O. caerulescens
 O. atriventris - Propodeal triangle COMPLETELY dulled by lines and heavy surface roughness - S4 when viewed edge-on to the rim has only a single rim - In direct comparison clearly SMALLER - Integument color always DARK BLUE and hairs clearly white (1)
 O. caerulescens - Propodeal triangle, apical one third to two-thirds surface glossy and mirror-like without any noticable inscribed lines - S4 when viewed edge-on has a double rim, similar to what a slightly opened ziplock sandwhich bag might look like - In direct comparison clearly LARGER - Integument color tends to be BRASSY GREEN with some blue overtones and tan or golden hair (1)
O. atriventris vs. O. distincta
 - Abdomen, S3, hairs in central concave portion or rim edge, long enough to come to a POINT IN CENTER (2)
 O. atriventris - Abdomen, S3, rim shape, width of concave portion of rim is half to three-quarters as wide as entire rim - NOTE - Rim is often retracted under S2 and is not visible without dissection - S3, hair length, LONG in the center of the concave section, REACHING PAST the upper margin of the rim - In direct comparison smaller, cleft in T7 deeper shallower and more u-shaped (1)
 O. distincta - Abdomen, S3, rim shape, width of concave portion of rim is equal to the entire rim, rim beginning to slope down at the point where upper and lower abdominal plates meet - NOTE - Rim is often retracted under S2 and is not visible without dissection - S3, hair length, Short in the center of the concave portion, NOT reaching past the upper margin of the rim - In direct comparison larger, cleft in T7 deeper and more v-shaped (1)
 - Abdomen, S3, hairs in central concave portion or rim edge, NOT long enough to come to a point in the center (1)
O. bucephala vs. all others
 All other species - Leg, inner spur, no more than 1.5X the length of outer spur - Tarsal segments, middle legs, similar in size to those of other legs (27)
 O. bucephala - Leg, inner spur, nearly 2x the length of the outer spur - Tarsal segments, middle legs, size greatly and obviously EXPANDED (1)
O. chalybea vs O. texana - Two very uncommon large species
 O. chalybea - T4 with white outer hairs and a patch of distinct BLACK HAIRS in the center - In direct comparison, clearly larger, more southern in distribution, the ocelli diameter larger and the wings darker - An early spring species (1)
 O. texana - T4 hairs ENTIRELY WHITE - In direct comparison, clearly smaller, more northern in distribution, the ocelli diameter smaller and the wings lighter, but still at least a little bit smoky - A summer species (1)
O. collinsiae vs. O. virga
 O. collinsiae - Abdomen, S4, hair color, with distinct BLACK hairs in the center and towards the rim - S4, topography, a clear DEPRESSED TRENCH running longitudinally down the center of S4 - Head, mandible, with two ABSOLUTELY PARALLEL raised lines or carinae on the outer lower face of the mandible - Abdomen, T2 unpitted rim, relatively WIDE compared to other species, but does not occupy more than one fifth of the longitudinal width of the segment (1)
 O. virga - Abdomen, S4, hair color, with WHITE hairs throughout the segment - S4, topography, with NO distinct trench running longitudinally down the center, however, there can be a vague line in that area where the surface sculpturing changes - Head, mandible, with two SLIGHTLY diverging raised lines or carinae on the outer lower face of the mandible that run from the tip to the base of the mandible - Abdomen, T2 unpitted rim, VERY WIDE, occupying more than one fifth of the longitudinal width of the segment (1)
O. cordata vs. O. atriventris vs. O. pumila vs. O. inspergens
 Abdomen, T7, rim, U-SHAPED notch with RIGHT ANGLES on either side of notch - NOTE - The rim is often partially hidden by the rim of T6, which can also be notched (2)
 - Abdomen, T7, rim, deep V-SHAPED notch - NOTE - The rim is often partially hidden by the rim of T6, which can also be notched (1)
 Abdomen, T7, rim, deep U-SHAPED notch with parallel-sided, elongate PRONGS on either side of notch - NOTE - The rim is often partially hidden by the rim of T6, which can also be notched (1)
O. cordata vs. O. distincta
 - Abdomen, T6, density of pits, closely punctate throughout, pit density equal to or greater than pit density in center of T2 (1)
 - Abdomen, T6, density of pits, only moderately punctate throughout, pit density less than pit density in center of T2 (1)
O. distincta vs. O. pumila
 O. distincta The flat or slightly concave anterior face of T1 is not inscribed with any or many microscopic lines and thus the surface is shiny and mirror like - Abdomen, S3, rim outline, width of concave portion in center of rim is equal to the entire rim, the rim beginning to slope down at point where upper and lower abdominal plates meet - S3, hairs, DO come together to a point in the center of the central concave portion of the rim - In direct comparison larger, cleft in T7 deeper and more v-shaped (1)
 O. pumila - The flat or slightly concave anterior face of T1 is inscribed with many microscopic lines making the surface dull and reflecting relatively little light - Abdomen, S3, rim outline, width of concave portion in center of rim is 1/3 as wide as entire rim, rim beginning to slope down well inside point where upper and lower abdominal plates meet - S3, hairs, DO NOT all come together to a point in the center of the central concave portion of the rim - In direct comparison smaller, cleft in T7 shallower and more u-shaped (1)
O. georgica vs. O. pumila and O. atriventris - Common, superficially similar species
 O. pumila and O. atriventris - Abdomen, S2 tip, always SMOOTHLY CONVEX - S3, when visible, a much shallower V- shape in comparison with O. georgica - S4, with white hairs that clearly EXTEND BEYOND the tip of the segment, particularly in O. atriventris - S4, rim, simple and UNGROOVED throughout its entire length - Thorax, propodeal pit, OVAL, the interior clearly visible (2)
 O. georgica - Abdomen, tip of S2, slightly flattened to slightly emarginate of concave - S3, when visible, a much deeper V-shape in comparison with other Osmia - S4, with white hairs at the tip that only go insignificantly beyond the tip of the segment - S4, rim at high magnification, away from the tip, SLIGHTLY GROOVED such that it appears as if there are two narrow parallel rims, something like a Zip-lock baggie - Thorax, propodeal pit, a simple NARROW LONGITUDINAL SLOT like someone took the tip of a nail and inscribed a line into the surface (1)
O. inspergens and O. inermis vs O. distincta and O. michiganensis
 - Abdomen, S4, rim shape, center of rim broadly CONVEX (2)
 - Abdomen, S4, rim shape, outline broadly CONCAVE in center (2)
O. michiganensis vs. O. atriventris vs. O. distincta
 - Abdomen, S3, hairs in central concave portion or rim edge, long enough to come to a POINT IN CENTER (2)
 - Abdomen, S3, hairs in central concave portion or rim edge, NOT long enough to come to a point in the center (1)
O. pumila vs. O. atriventris.
 O. atriventris - Abdomen, S2, hair along rim, SHORT, just barely extending past the rim of the plate, especially in the center of the rim - Leg, hind basitarsi, WITHOUT a small spine, NOTE that this spine takes experience to find, so be cautious about claiming none exists - Abdomen, S4, hairs at tip, go well beyond the end of the segment in comparison with O. pumila (1)
 O. pumila - Abdomen, S2, hair along the rim, LONG, extending more than 1/2 their length past the rim - Leg, hind basitarsi, with a SMALL SPINE hidden amidst the dense hairs on the anterior edge of the underside about 1/3 of the way from the apical end - Abdomen, S4 hairs on the tip, in direct comparison with O. atriventris do not extend beyond the tip as much (1)
O. pumila vs. O. sandhouseae
 O. pumila - Abdomen, T3 rim, when visible, with a concave central area that is SHALLOW and shaped as a HALF CIRCLE - Thorax, scutum, pits appearance, very tightly packed but not so much that all touch or overlap one-another, there is usually a THIN SLIVER of surface BETWEEN the pits creating a bit more sheen to the surface than O. sandhouseae - Propodeal pit, in direct comparison with O. sandhouseae, OVAL, WIDER, and shiny inside - Overall coloration, tends towards a BRASSY GREEN - Size, in comparison with O. sandhouseae, SMALLER (1)
 O. sandhouseae - Abdomen, T3 rim, when visible, with steep almost V-shaped sides to the central concave area, forming a BLUNTED V-SHAPE at the bottom of the dip - Thorax, scutum, pits appearance, so TIGHTLY PACKED that almost ALL of them in the center of the scutum touch or OVERLAP ONE-ANOTHER, greatly dulling the surface - Propodeal pit, in direct comparison with O. pumila, is much NAROWER, line-like - Overall integument colloration, tends towards a BRASSY GREEN BLUE, particularly on the abdomen - Size, in comparison with O. pumila, LARGER (1)
O. simillima vs. all others
 All others - Head, antennae, middle segments, shape of ventral side, STRAIGHT in profile, or nearly so (27)
 O. simillima - Head, antennae, middle segments, shape of ventral side, slightly SCALLOPED in profile (1)
State or province where bee was collected
 NY (25)
 IN (24)
 MI (24)
 WI (24)
 IL (23)
 Ontario (23)
 PA (23)
 NJ (22)
 MA (21)
 MD (21)
 NC (21)
 OH (21)
 VA (21)
 CT (20)
 RI (20)
 TN (20)
 WV (20)
 DC (19)
 GA (19)
 KY (19)
 NH (19)
 SC (19)
 DE (18)
 ME (18)
 Nova Scotia (18)
 Quebec (18)
 VT (17)
 New Brunswick (16)
 AL (15)
 FL (14)
 MS (14)
 Prince Edward Island (12)
 Newfoundland and Labrador (5)
Subgenus
 Melanosmia (18)
 Helicosmia (4)
 Osmia (3)
 Diceratosmia (2)
 Cephalosmia (1)
Thorax, propodeal pit, inner surface appearance
 Smooth and shiny (18)
 Finely pebbled, coarse, and dull (10)
 Rim area finely roughened or pebbled, shiny within (5)
 Not visible because the opening is just a slit (3)
Thorax, propodeal pit, shape
 Oval shaped depression, ends narrowly rounded, like a grain of rice (17)
 Oval shaped depression, ends broadly rounded like an egg (10)
 Parallel-sided depression, ends blunted, shallow, not a deep trench (8)
 Circular or raindrop shaped depression (5)
 Parallel sided trench, deep and narrow - Appearing as a slit on the surface (4)