34 kinds match COMPARE IMAGES

Perdita ainsliei  [popup] female Perdita albipennis  [popup] female Perdita bishoppi  [popup] female Perdita blatchleyi  [popup] female Perdita boltoniae  [popup] female Perdita bradleyi  [popup] female Perdita bruneri  [popup] female Perdita consobrina  [popup] female Perdita discreta  [popup] female Perdita dolichocephala  [popup] female Perdita fallax  [popup] female Perdita floridensis  [popup] female Perdita foveata  [popup] female Perdita georgica  [popup] female Perdita gerardiae  [popup] female Perdita gerhardi  [popup] female Perdita graenicheri  [popup] female Perdita halictoides  [popup] female Perdita ignota  [popup] female Perdita krombeini  [popup] female Perdita laticincta  [popup] female Perdita maculigera  [popup] female Perdita mitchelli  [popup] female Perdita novaeangliae  [popup] female Perdita nubila  [popup] female Perdita obscurata  [popup] female Perdita octomaculata  [popup] female Perdita pallidipennis  [popup] female Perdita perpallida  [popup] female Perdita polygonellae  [popup] female Perdita sexmaculata  [popup] Perdita swenki  [popup] female Perdita townesi  [popup] female Perdita tridentata  [popup]

REMAINING (number with state)
Abdomen, upper side, color pattern
 Dark with light colored bands that extend across two or more segments, but are briefly INTERRUPTED in the center (20)
 Dark with light colored PATCHES on the sides of two or more segments (16)
 Dark, NO markings or with only 2 small patches on only one segment (10)
 Dark with light colored bands that are BROAD and COMPLETE, extending across the entire middle of two or more segments (7)
 Pale yellow, orange, reddish, ferruginous (4)
Forewing, 1st intercubital vein
 Simple, no branching, nor any additional tiny cell (25)
 Branched, forming a triangular additional cell at its base that can range from large and conspicuous to minute and visible only under high magnification (6)
Head, antennal scape, color on front side
 Mostly or entirely yellow (18)
 Entirely dark (17)
 Mostly dark with some yellow (11)
Head, clypeus, color
 Mostly dark with pale to bright yellow markings (14)
 Mostly milky white with some dark markings (13)
 Mostly pale to bright yellow with dark markings (12)
 Entirely milky white to pale yellow (9)
 Entirely dark (8)
 Mostly dark with milky white markings (7)
Head, face, extent of markings to either side of the clypeus, if present
 Markings DO NOT extend to or past the antennal sockets (16)
 Markings DO extend to or past the antennal sockets (16)
 Lacking these markings (7)
Head, face, length vs width
 Wider than long (18)
 Longer than wide (8)
 Equal (5)
Head, mandible, shape
 Normal, tip NOT flexed relative to base, may be gently curved toward head (30)
 Tip flexed toward the head at nearly a right angle relative to base (2)
Hind legs, scopa, hair type - If filled with pollen usually impossible to determine
 At least half of scopal hairs are SIMPLE, ABSOLUTELY unbranched - Some branched hairs usually present along sides and near base - Careful, branches can be minute and scale-like, very easy to mistake as simple (18)
 Hairs are mostly BRANCHED, these branches are MINUTE and short, often scale-like, usually set at an acute angle to the mainstem regularly spaced throughout the last two-thirds of the hair, and visible only at high magnification, hairs along the edges with slightly longer branches which often lead to the mistake that the remaining hairs are without branches (10)
 Hairs are relatively longer and more abundant than other species and clearly WAVY rather than straight (2)
P. albipennis vs. P. pallidipennis
 P. albipennis - Wings, all veins, without question, MILKY WHITE, the stigma with a slight yellowish cast around the edges - Very similar to P. pallidipennis (1)
 P. pallidipennis - Wings, most veins, with a light BROWNISH CAST, particulary around the stigma and margin of the wing - Very similar to P. albipennis (1)
P. bishoppi vs. P. graenicheri vs. P. nubila
 P. bishoppi - Abdomen, coloring, either entirely dark or with only very small pale patches or lines, usually only on T2 or T3 or at times both - Wings, color, ground color of wings CLEAR to slightly milky-white - Veins, color, a LIGHT BROWN, this color most apparent in the area near the stigma (1)
 P. graenicheri - Abdomen, coloring, with bold transverse PALE LINES, usually clearly broken in the middle, and most prominent on T2 and T3 - Wings, color, ground color of wings MILKY-WHITE - Veins, color, WHITE to a very pale yellow (1)
 P. nubila - According to Mitchell - Abdomen, coloring, ALL DARK - Wings, color, MILKY-WHITE - Veins, color, nearly COLORLESS (1)
P. bishoppi vs.P.boltoniae and P. foveata
 P. boltoniae and P. foveata - Head and thorax, markings, ivory marks usually ABSENT on pronotal lobe, edges of marks on clypeus often fuzzy BLENDING INTO dark background - Head, clypeus, sometimes without any ivory markings and usually with large invading DARK PATCHES - Fovea, wider at the top than the middle, tapering to nearly a point at the bottom (2)
 P. bishoppi - Head and thorax, markings, clear ivory marks almost always PRESENT on the clypeus, parocular area, pronotal collar, and pronotal lobe, their edges SHARPLY DEMARCATED - Head, clypeus, color, usually completely or almost COMPLETELY IVORY - Fovea, top of fovea the same width as the center of the fovea, overall shape like a simple linear trough (1)
P. boltoniae vs. P. foveata
 P. boltoniae - 2 VARIATIONS - East coast specimens - Head, clypeus, pale markings broken up by often extensive dark areas - Abdomen, color, ENTIRELY DARK - Prairie specimens - Head, clypeus, ENTIRELY PALE, and the pale marks in the parocular area are small and don�t extend to the antennae - Abdomen, coloring, pale transverse bands usually broken in the middle - The prairie variety of P. boltoniae is more like to be confused with P. foveata than the east coast variety (1)
 P. foveata - Head, clypeus color, with a good deal of dark intermixed with the pale areas - Parocular area, with pale marks that extend up to the base of the antennae - Abdomen, coloring, narrow basal broken stripes on at least on T2 (1)
P. bradleyi and P. townesi vs. P. octomaculata
 P. bradleyi and P. townesi - Wing, usually with at least a small triangular cell formed by a forking of the first intercubital vein at its base, sometimes cell very minute, rarely completely absent - Head, clypeus, USUALLY with a central yellow stripe and small yellow spots on its far sides, the remainder dark - Scape, front side, USUALLY with at least some yellow (2)
 P. octomaculata - Wing,first intercubital vein always without a cell at its base - Head, clypeus, USUALLY almost entirely yellow with two thin dark stripes invading the yellow on either side of center, these do not extend to the edge of the clypeus - Scape, front side, color, entirely dark (1)
P. bradleyi and P. townesi vs. selected others
 Others - Front wing, WITHOUT even a hint of a triangular cell, first intercubital vein joining the cell at its base without a noticeable widening (3)
 P. bradleyi and P. townesi - Front wing, usually with at least a SMALL TRIANGULAR CELL formed by a forking of the first intercubital vein at its base, sometimes cell is so tiny it can only be seen at high power, rarely completely absent (2)
P. bradleyi vs. P. townesi - NOTE - Extremely similar species
 P. bradleyi - Head, facial markings, female is very similar to P. townesi and the literature states they are separated by the reduced yellow in the face of P. bradleyi, in specimens we have seen the yellow central stripe is much narrower than the dark space intervening between the central stripe and lateral yellow marks (1)
 P. townesi - Head, facial markings, female in the literature is not well defined, this species is thought to have more developed facial marks than P. bradleyi, the clypeus with a central yellow stripe and the sides with lateral spots and the dark areas in between as wide or wider than the central stripe, but this may not be a distinguishing feature in all cases (1)
P. consobrina vs. P. swenki
 P. consobrina - Range, SOUTHERN, roughly Maryland south - Abdomen, T2 and T3, yellow marks WIDELY SEPARATED - Very closely related to P. swenki (1)
 P. swenki - Range, NORTHERN, roughly New Jersey north - Abdomen, T2 and T3, yellow marks NEARLY MEETING in the middle where T2 and T3 join, with a gap roughly the width of the yellow stripe or less - Very closely related to P. consobrina (1)
P. gerhardi vs. P. maculigera vs. P. swenki
 P. gerhardi - Head, coloring, with a THIN PALE STRIP extending from the mandible along the cheek side of the eye to about one third of the way up the eye - NOTE - There are forms of P. gerhardi that are ENTIRELY pale white, these fall out elsewhere in the Perdita guide - Wing, stigma, normal - Thorax, mesepisternum, with a very SMALL YELLOW DOT or mark just below the base of the wing (1)
 P. maculigera - Head, coloring, NO pale stripe bordering the cheek side of the eye - Wing, stigma, noticeably SHORT AND WIDE, within the otherwise pale background of the stigma is a very large DARK SPOT extending over half of the cell, distinctly visible at even the lowest power, and is unique among all eastern species in having this feature - Thorax, mesepisternum, with a very SMALL YELLOW DOT or mark just below the base of the wing (1)
 P. swenki - Head, coloring, NO pale stripe bordering the cheek side of the eye - Wing, stigma, normal - Thorax, mesepisternum, LACKS the very small yellow dot or mark on the just below the base of the wing, making it unique among these three species (1)
P. gerhardi, light form, vs. P. perpallida
 - Head, greatest width of supraclypeal region vs. width from antenna to inner margin of the eye, width LESS than distance between antenna and eye (1)
 - Head, greatest width of supraclypeal region vs. width from antenna to inner margin of the eye, width equal to or GREATER than distance between antenna and eye (1)
P. ignota vs All Other Species
 Others - Click here to eliminate P. ignota from the list (31)
 P. ignota - Just recently aware of this species in Illinois and awaiting specimens to score (1)
P. krombeini - Female not described
 Eliminate from list (30)
 Keep in list (14)
P. polygonellae vs. P. gerhardi
 P. gerhardi - DARK FORM - Head and thorax, color, METALLIC BLUE - Abdomen, color, DARK with prominent light colored stripes (2)
 P. gerhardi - LIGHT FORM - Head, color, face usually has 2 SMALL PATCHES of the metallic blue somewhere above the antennae, and internal area of fovea also often metallic blue - Abdomen, color, can have large dark blotches of metallic blue - Unusual in that the entire body is very nearly completely light yellow (2)
 P. polygonellae - Head and thorax, color, appear like other Perdita species - Abdomen, color, entirely YELLOW or orange-reddish, with no noticeable stripes or other markings - A quick glance would suggest one of the metallic Lasioglossum species rather than Perdita (1)
State or province where bee was collected
 FL (22)
 GA (18)
 NC (18)
 SC (18)
 DE (17)
 MD (17)
 NJ (17)
 VA (17)
 AL (16)
 KS (16)
 MO (16)
 MS (16)
 OK (16)
 MN (15)
 LA (14)
 NE (14)
 TX (13)
 IA (12)
 IL (12)
 IN (12)
 SD (12)
 WI (12)
 AR (11)
 MI (11)
 NY (11)
 ND (10)
 PA (10)
 OH (8)
 Ontario (8)
 DC (7)
 MA (7)
 CT (6)
 KY (6)
 TN (6)
 WV (6)
 RI (4)
 ME (3)
 Quebec (3)
 NH (2)
 VT (2)
 Alberta (1)
 CO (1)
 MT (1)
 NM (1)
 New Brunswick (1)
 Nova Scotia (1)
 Prince Edward Island (1)
 Saskatchewan (1)
 UT (1)
 WY (1)
Subgenus
 Perdita (16)
 Hexaperdita (8)
 Alloperdita (6)
 Cockerellia (2)
 Epimacrotera (1)
Thorax, upper and side surfaces, color pattern
 Dark with pale markings on pronotum AND pronotal lobes (17)
 Entirely dark with NO markings (11)
 Dark with pale markings on pronotum only (10)
 Dark with pale marking on pronotal lobe only (5)
 All pale, may have a few dark markings (2)
 Dark with pale markings on pronotum, pronotal lobe, and side surfaces (2)
Wings, color of veins
 Clear to milky white or pale yellow with a light coloured stigma - stigma sometimes with dark edges (20)
 Light to dark brown (19)
 Pale yellow with a conspicuously dark stigma (1)