10 kinds match COMPARE IMAGES THUMBNAILS MAP

Dufourea harveyi  [popup] male Dufourea harveyi  [popup] female Dufourea marginata  [popup] female Dufourea marginata  [popup] male Dufourea maura  [popup] female Dufourea maura  [popup] male Dufourea monardae  [popup] female Dufourea monardae  [popup] male Dufourea novaeangliae  [popup] female Dufourea novaeangliae  [popup] male

REMAINING (number with state)
Female, D. harveyi vs. D. marginata
 D. harveyi - Thorax, scutum, interior center of the segment, pits spaced SEVERAL PIT DIAMETERS APART and unpitted areas shiny and MIRROR-like - Leg, middle, tibial spur, half to OVER HALF as long as the basitarsis - In direct comparison clearly SMALLER (1)
 D. marginata - Thorax, scutum, interior center of the segment, PITS ALL TOUCHING or overlapping creating a SANDPAPER-like surface - Leg, middle, tibial spur, LESS THAN HALF as long as the basitarsis - In direct comparison clearly LARGER (1)
Female, D. monardae vs. D. novaeangliae
 D. monardae - Head, mouthparts, WITHOUT hairs - Leg, middle, basitarsus, parallel-side with the width in the middle approximately equal to the width at the apex (1)
 D. novaeangliae - Head, mouthparts with LONG PROMINENT hairs in several places - Leg, middle, basitarsus, posterior edge SLIGHTLY BOWED, and thus the center of the segment is SLIGHTLY wider than the apex (1)
Hairs on head, thorax and abdomen
 PALE, with a possibility of some scattered black hairs being present (5)
 Dark BLACK, possibly with some scattered pale hairs, but usually not (3)
Head, length vs width - Width measured as distance between outer edges of eyes and length measured as distance from vertex margin to rim of clypeus
 WIDER than long (6)
 Distinctly LONGER than wide (4)
Male, D. monardae vs. D. novaeangliae
 D. monardae - Leg, hind, trochanter, ventral edge, angle of outline is OBTUSE - Thorax, propodeal triangle, rim where it curves over to the ventral face, this area without any raised striations - Abdomen, S6, there are two low swellings in the center of the segment to either side of the longitudinal center line, these swellings do not have any carina or raised lines running down their main axis and remain simple low mounds (1)
 D. novaeangliae - Leg, hind, trochanter, ventral edge, angle of outline is ACUTE - Thorax, propodeal triangle, rim where it curves over to the ventral face, this area without A FEW raised striations that cross into the area - Abdomen, S6, there are two low swellings in the center of the segment to either side of the longitudinal center line, these swellings have SUBTLE carina or raised lines running down the main axis, be careful as the lines can be difficult to detect if you don t zoom in and inspect closely (1)
Male, abdomen, S6
 Others - TWO LOW, SMALL mounds located just to either side of the longitudinal axis of S6, height of mounds far lower than half the latitudinal distance of S6 (3)
 D. marginata - LOW mound-like projection running longitudinally down the center of S6, its height far less than half the width of S6, and its maximum with about the same as its maximum height (1)
 D. maura - HUGE AND DRAMATIC thin, keel-like projection running longitudinally down the center of the segment, height is half to over half the latitudinal width of S6 and width of projection is only about as wide as the width of the antenna, projection having numerous long dark black hairs (1)
Sex, number of antennal segments
 Female, 12 (5)
 Male, 13 (5)
State or province where bee was collected
 MI (10)
 MN (10)
 WI (10)
 Ontario (9)
 IL (8)
 IN (8)
 OH (7)
 IA (6)
 KY (6)
 MO (6)
 ND (6)
 NY (5)
 CT (4)
 DC (4)
 DE (4)
 MA (4)
 MD (4)
 ME (4)
 NE (4)
 NH (4)
 NJ (4)
 PA (4)
 RI (4)
 SD (4)
 VA (4)
 WV (4)
 Quebec (3)
 TN (3)
 VT (3)
 KS (2)
 MS (2)
 NC (2)
 Nova Scotia (2)
 Prince Edward Island (2)
 SC (2)
 New Brunswick (1)