26 kinds match COMPARE IMAGES

Perdita albipennis  [popup] female Perdita bequaerti  [popup] female Perdita bishoppi  [popup] female Perdita blatchleyi  [popup] female Perdita boltoniae  [popup] female Perdita bradleyi  [popup] female Perdita consobrina  [popup] female Perdita discreta  [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 krombeini  [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 perpallida  [popup] female Perdita polygonellae  [popup] female Perdita swenki  [popup] female Perdita townesi  [popup] female

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 (15)
 Dark with light colored PATCHES on the sides of two or more segments (13)
 Dark, NO markings or with only 2 small patches on only one segment (9)
 Dark with light colored bands that are BROAD and COMPLETE, extending across the entire middle of two or more segments (5)
 Pale yellow to reddish (3)
Forewing, 1st intercubital vein
 Simple, no branching, nor any additional tiny cell (22)
 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 (15)
 Entirely dark (12)
 Mostly dark with some yellow (8)
Head, clypeus, color
 Mostly dark with pale to bright yellow markings (13)
 Mostly pale to bright yellow with dark markings (11)
 Mostly milky white with some dark markings (9)
 Entirely milky white to pale yellow (7)
 Mostly dark with milky white markings (7)
 Entirely dark (3)
Head, face, extent of markings to either side of the clypeus, if present
 Markings DO NOT extend to or past the antennal sockets (12)
 Markings DO extend to or past the antennal sockets (12)
 Lacking these markings (5)
Head, face, length vs width
 Wider than long (19)
 Equal (5)
 Longer than wide (3)
Head, mandible, shape
 Normal, tip NOT flexed relative to base, may be gently curved toward head (24)
 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 (9)
 Hairs are relatively longer and more abundant than other species and clearly WAVY rather than straight (2)
P. albipennis vs. P. bequaerti
 P. albipennis - Wings, color of veins, ALL wing veins without question, MILKY WHITE, the stigma with a slight YELLOWISH CAST around the edges - NOTE - P. albipennis and P. bequaerti are very similar species (1)
 P. bequaerti - Wings, color of veins, MOST wing veins with a light BROWNISH CAST, particulary around the stigma and margin of the wing - NOTE - P. albipennis and P. bequaerti are very similar species (1)
P. bishoppi vs. P. graenicheri vs. P. nubila
 P. bishoppi - Abdomen, color, either entirely DARK or with only very small pale patches or lines, usually only on T2 or T3 or at times both - Wings, ground color, CLEAR to slightly milky-white - Veins, color, a LIGHT BROWN, this color most apparent in the area near the stigma (1)
 P. graenicheri - Abdomen, color, with bold transverse PALE LINES, usually clearly broken in the middle, and most prominent on T2 and T3 - Wings, ground color, MILKY-WHITE - Veins, color, WHITE to a very pale yellow (1)
 P. nubila - According to Mitchell - Abdomen, ALL DARK - Wings, base color, MILKY-WHITE - Veins, color, nearly COLORLESS (1)
P. bishoppi vs. P.boltoniae and P. foveata
 P. boltoniae and P. foveata - Head, clypeus, edges of marks on clypeus often fuzzy BLENDING into dark background, sometimes without any ivory markings and usually with large invading DARK PATCHES - Thorax, pronotal lobe, ivory marks usually ABSENT - Face, fovea WIDER at the top than the middle, tapering to nearly a point at the bottom (2)
 P. bishoppi - Head, clypeus and paraocular area, almost always with clear IVORY MARKS present with sharply demarcated edges - Thorax, pronotal collar and pronotal lobe, with clear IVORY MARKS present with sharply demarcated edges - Clypeus, color, usually completely or almost completely IVORY - Face, 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 - Abdomen, color, ENTIRELY DARK - Head, clypeus, pale markings that are broken up by often extensive dark areas - PRAIRIE specimens - Abdomen, color, with pale transverse bands usually broken in the middle - Head, clypeus, ENTIRELY PALE and the pale marks in the paraocular area are small and don’t extend to the antennae - Prairie specimens of P. boltoniae are more likely to be confused with P. foveata than are east coast specimens (1)
 P. foveata - Abdomen, markings, with narrow basal broken stripes, on at least T2 - Head, clypeus, with a good deal of dark INTERMIXED with the pale areas - Paraocular area, with PALE MARKS that extend up to the base of the antennae (1)
P. bradleyi and P. townesi vs. P. octomaculata
 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 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, color, USUALLY with at least some yellow (2)
 P. octomaculata - Front wing, first intercubital vein always WITHOUT a cell at its base - 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, color, ENTIRELY DARK (1)
P. bradleyi and P. townesi vs. selected others
 Others - Front wings, WITHOUT even a hint of a triangular cell - Veins, first intercubital vein joining the cell at its base without a noticable 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 - Female very similar to P. townesi - Head, facial markings, yellow central stripe much NARROWER than the dark space intervening between the central stripe and lateral yellow marks - Literature states, incomparison with P. townesi, P. bradleyi has reduced yellow in the face (1)
 P. townesi - Female very similar to P. bradleyi - The 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 - Head, markings are clearly YELLOW - Thorax, pronotal collar, WITHOUT markings - Head, labrum, color, either DARK or only partially yellow, In the specimens we have viewed (1)
 P. swenki - Head, markings are IVORY with a hint of a wash of yellow, particulary on the scape - Thorax, pronotal collar, usually with MARKINGS - Head, labrum, color, ENTIRELY IVORY in the specimens we have viewed (1)
P. gerhardi vs. P. maculigera vs. P. swenki
 P. gerhardi - Head, with a THIN PALE STRIP extending from the mandible along the cheek side of the eye extending about one third of the way up the eye, unique among these three species - Note - There are forms of P. gerhardi that are ENTIRELY pale white, these fall out elsewhere in the Perdita guide - Wing, stigma normal - Thorax, mesepisturnum, with a very SMALL YELLOW DOT or mark on the just below the base of the wing (1)
 P. maculigera - Head, NO pale stripe bordering the cheek side of the eye - Wing, with 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, unique among all eastern species - Thorax, mesepisturnum, with a very SMALL YELLOW DOT or mark on the just below the base of the wing (1)
 P. swenki - Head, NO pale stripe bordering the cheek side of the eye - Wing, stigma normal - Thorax, mesepisturnum, LACKS very small yellow dot or mark just below the base of the wing, unique among these three species (1)
P. gerhardi, light form, vs. P. perpallida
 - Head, greatest width of supraclypeal region vs. width from antennae to inner margin of the eye, width LESS than distance between antenna and eye (1)
 - Head, greatest width of supraclypeal region vs. width from antennae to inner margin of the eye, width equal to or GREATER than distance between antenna and eye (1)
P. krombeini - female not described
 Keep in list (24)
 Eliminate from list (23)
P. polygonellae vs. P. gerhardi
 P. gerhardi - DARK FORM - Head and thorax color, metallic BLUE - Abdomen, color, DARK with prominant light colored stripes - Looks like most other Perdita species (2)
 P. gerhardi - LIGHT FORM – Body color, almost completely LIGHT YELLOW, which is unusual - Abdomen, coloring, can have large dark blotches - Head, facial coloring, usually has 2 small patches of the usual metallic blue somewhere above the antennae, internal area of fovea also often metallic blue (2)
 P. polygonellae - Abdomen, color, entirely YELLOW or an orange-reddish, with NO noticable stripes or other markings - Thorax and head, color, appear like other Perdita species - A quick glance would suggest one of the metallic Lasioglossum species rather than Perdita species (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)
 MS (16)
 IL (11)
 IN (11)
 MI (11)
 NY (11)
 WI (11)
 PA (9)
 OH (8)
 Ontario (8)
 DC (7)
 MA (7)
 CT (5)
 WV (5)
 KY (4)
 TN (4)
 RI (3)
 ME (2)
 Quebec (2)
 NH (1)
 New Brunswick (1)
 Nova Scotia (1)
 Prince Edward Island (1)
 VT (1)
Thorax, upper and side surfaces, color pattern
 Dark with pale markings on pronotum AND pronotal lobes (15)
 Dark with pale markings on pronotum only (9)
 Entirely dark with NO markings (7)
 All pale, may have a few dark markings (2)
 Dark with pale marking on pronotal lobe only (1)
 Dark with pale markings on pronotum, pronotal lobe, and side surfaces (1)
Wings, color of veins
 Clear to milky white or pale yellow with a normal stigma (17)
 Light to dark brown (16)
 Pale yellow with a conspicuously dark stigma (1)