Basic steps:
  1. Answer one or more questions on right by clicking checkboxes. It's okay to check multiple boxes. Then click any 'search' button.
  2. Results appear on left. Click the 'simplify' button to get more questions.
  3. Repeat steps 1 and 2, narrowing down the possibilities.
  4. A 'COMPARE IMAGES' link appears on left when under 100 kinds match. Use this to compare kinds.
Click Restart to search again.
Click Guides to list other guides.
Click here if you're a new user.

Discover Life 18 kinds match in US, VT:
Nomada articulata  [popup] male
Nomada banksi  [popup] male
Nomada composita  [popup] male
Nomada cressonii  [popup] male
Nomada depressa  [popup] male
Nomada detrita  [popup]
Nomada dreisbachi  [popup] male
Nomada electa  [popup] male
Nomada florilega  [popup] male
Nomada imbricata  [popup] male
Nomada integerrima  [popup] male
Nomada luteola  [popup] male
Nomada luteoloides  [popup] male
Nomada mendica  [popup]
Nomada pygmaea  [popup] male
Nomada sayi  [popup] male
Nomada valida  [popup] male
Nomada vicina  [popup] male


REMAINING (number with state)
Abdomen, T1, presence and position of yellow markings
 2 widely spaced lateral PATCHES (10)
 None (10)
 A latitudinal band or stripe that is broken or INTERRUPTED in the center, sometimes by only a thin vertical line (8)
 A CONTINUOUS latitudinal band or stripe from side to side (3)
Abdomen, T2, presence and position of yellow markings
 A latitudinal band or stripe that is broken or INTERRUPTED in the center, sometimes by only a thin vertical line (12)
 2 widely spaced lateral PATCHES (10)
 A CONTINUOUS latitudinal band or stripe from side to side (6)
 NONE (1)
Abdomen, T3, presence and position of yellow markings
 2 widely spaced lateral PATCHES (11)
 A latitudinal band or stripe that is broken or INTERRUPTED in the center, sometimes by only a thin vertical line (11)
 A CONTINUOUS latitudinal band or stripe from side to side (6)
 NONE (3)
Abdomen, T4, presence and position of yellow markings
 A latitudinal band or stripe that is broken or INTERRUPTED in the center, sometimes by only a thin vertical line (11)
 A CONTINUOUS latitudinal band or stripe from side to side (10)
 2 widely spaced lateral PATCHES (9)
 NONE (6)
Abdomen, T5, presence and position of yellow markings
 A CONTINUOUS latitudinal band or stripe from side to side (13)
 A latitudinal band or stripe that is broken or INTERRUPTED in the center, sometimes by only a thin vertical line (10)
 2 widely spaced lateral PATCHES (7)
 NONE (7)
Abdomen, T6, presence and position of yellow markings
 Completely yellow or 1 or 2 patches (15)
 None (5)
Abdomen, pygidium, end
 Notched (16)
 Rounded or flat (4)
EXPERIENCED USERS - Tibia, hind leg, presence of small RED spine or setae like hairs at very end, look carefully for small ones hidden among the white hairs, be aware that there is always a triangular projection at the very end of the tibia that could be confusing
 Present (10)
 Absent (7)
Head, antenna, flagellar segment 1
 Length greater than breadth (15)
 Greatest width equal to or broader than greatest length (11)
Head, antenna, flagellar segment 1 versus 2 - measuring along each segments LONGEST side
 2 greater than 1 (17)
 1 and 2 equal (1)
 1 greater than 2 (1)
Head, antenna, flagellar segment 2 versus 3 - measuring along each segments LONGEST side
 2 greater than 3 (17)
 2 and 3 equal (1)
 3 greater than 2 (1)
Head, antenna, flagellar segment 3, presence of a very small, but distinct, sharp spine on the underside
 Absent (16)
 Present (2)
Head, antenna, flagellar segments 6 and 7
 Length longer than width (16)
 Width equal to or broader than length (2)
Head, cheek, rim edge that parallels the side of the eye
 Cheek ends smoothly without change in shape (12)
 Cheek ends with very edge of rim curled outward - carinate (9)
Head, clypeus, PRIMARY color
 Yellow (15)
 Black (4)
Head, supraclypeus, PRIMARY color
 Black (12)
 Yellow (11)
 Red or Orange (5)
IMPORTANT - Please Click Here to Remove Provisional Western Species
 RECOMMENDED - Eastern Nomada ONLY (18)
 NOT recommended - Include some provisional western species (16)
Males that Sam thinks are not likely valid species - N. autumnalis, N. capillata, N. ceanothi, N. dreisbachi, N. minima, N. salicis, N. sobrina, N. townesi, N. ulsterensis
 RECOMMENDED - Click here to eliminate these species from the system (17)
 Display these species (1)
N. annulata. N. cressonii, N. pygmaea, N. illinoensis, N. sayi vs. others - NOTE - These species are very common and often very confusing, so expect some specimens to not match any of these categories
 Others - DOUBLE CHECK your work - Many other species look similar, so look VERY closely at the tibial setae, all males faintly echo the setae of the females but are less stout and lighter in color and consequently are often EXTREMELY difficult to detect without a lot of practice - In this group you will see, again, with practice, a series of longer white setae about the same thickness as the rest of the hairs protruding from the surrounding hairs and decending in length - Also, look for body SIZE differences and differences in the OVERALL COLOR and SHAPE as further clues - The author still finds a fair number of specimens that have the general characters of the above species, but do not exactly match the patterns given here, those it is best to leave LABELED as Nomada sp. (13)
 N. cressonii - In direct comparison, the LARGEST species - In direct comparison, the mandibles are STOUT - T2-6 almost always with yellow markings - The marks on T2-3 usually come CLOSE TO TOUCHING in the center, but there is always at least a line separating the two sections - T2 always separated by less than the width of the yellow mark apart - Scutum, scutellum, metanotum, and rear face of propodeum almost always extensively red, in particular the scutellum appears to always be COMPLETELY RED without a notch or break along the midline, but at times with a black border along the suture with the scutum (1)
 N. illinoensis and N. sayi - In direct comparison the smallest species and often confused with N. parva - In comparison, the mandibles are thin and slightly elongate - Thorax, scutum, often all black, but individuals with extensive red exist too - Abdomen, T3 and usually T2, with yellow marks separated in the center by MORE THAN the width of these marks and NOT extending to the other tergites except rarely as small marks or relatively indistinct smudges - Note - The author is currently unsure if there are real differences between the two described species (1)
 N. pygmaea - In direct comparison, INTERMEDIATE between the other two species with plenty of overlap - Mandibles comparatively STOUT and the primary way of differentiating this species from N. sayi and N. illinoensis - The absence of anything more than a smudgy orange spot on S6 differentiates this species from N. cressonii, BUT in a FEW heavily marked individuals this spot will be present and differentiating from N. cressonii can only be done by inspecting and comparing a series of both - Scutum often all black but regularly almost completely red - T2- T3 always with strong yellow markings laterally can come close to touching in the center, but always with at least a line separating the two sections, T4-6 may or may not have yellow markings, if present, they tend to be less extensive than in N. cressonii - Scutellum often either completely black or with red patches laterally or the red being divided by black in the center, these specimens can be differentiated from N. cressonii, however, some do have all red on the scutellum and other characters have to be used (1)
N. banksi, N. composita, N. gracilis, N. valida, N. vicina, N. xanthura
 N. banksi - Thorax, mesepisturnum, center front, with SMALL OBLONG YELLOW mark - Scutellum, coloration, entirely black or with small yellow or orange marks, or at least a small amount of dark red - Abdomen, T2-T6, yellow markings, vary from patches on the sides, to stripes only slightly separated in the middle, to complete stripes on the apical segments - Head, clypeus, ENTIRELY YELLOW - Season, late SUMMER to FALL (1)
 N. composita - General description - Thorax, ENTIRELY BLACK, but with some specimens from the southern Appalachians with dark red on the scutellum, scutum, or a small patch of color on the front of the mesepisturnum - Abdomen, background color, very dark to NEAR BLACK- No clear yellow markings on the sternites, though there can be pale orangish colorations - T3-4 almost always with simple bright yellow ovals along the lateral edges of the segment, T5 may be oval or linear in configuration - Season, often one of the earliest SPRING species (1)
 N. valida - Note the male in this species has not been adequately described and thus the male will not differentiate from N. composita or N. gracilis - General Description, thorax, entirely black, with perhaps some specimens showing dark red on the scutellum or a small patch of color on the front of the mesepisturnum - Abdomen, background color, very dark to near black - A far northern species - season SPRING (1)
 N. vicina - Thorax, mesepisturnum, center front, with a small ORANGE-RED OBLONG mark - Scutellum, color, DARK RED - Abdomen, T2-T6, yellow markings, vary from patches on the sides to stripes only slightly separated in the middle, to complete stripes on the apical segments - Head, clypeus, coloring, largely BLACK with only the rim being yellow - Season, late SUMMER to FALL (1)
N. composita vs. N. integerrima
 N. composita - Head, antennae, flagellar segment 2, clearly much LARGER than either 1 or 3 - Abdomen, pygidium, clearly and obviously NOTCHED at the tip - Sternal plates, largely BLACK to very dark brown - Size, clearly larger, in comparison with N. integerrima (1)
 N. integerrima - Head, antennae, flagellar segments 1-3, comparatively short, sometimes nearly EQUAL in width and length but usually slightly longer, particularly F2 - Abdomen, pygidium, usually appearing TRUNCATE or slightly rounded out at the tip, at best only minutely notched - Sternal plates, appear ORANGISH-RED - Size, clearly smaller, in comparison with N. composita (1)
N. detrita and N. obliterata vs. all others
 Front wing, number of submarginal cells equals 3 (17)
 Front wing, number of submarginal cells equals 2 (1)
N. fragariae, N. imbricata, N. luteola, N. luteoloides, N. sulphurata
 N. imbricata - Head, antennae, flagellar segment 1, length, clearly more than half the length of 2nd flagellar segment - Last flagellar segment, with NO setae projecting beyond the tip - Hind leg, tibial setae, mostly 2-3 setae - NOTE - Tibial setae characters are difficult to determine without a lot of experience - Middle leg, femur, with hairs LESS than one quarter the width of the femur - Thorax, scutum, small narrow STRIP OF YELLOW along the sides, VARIABLE, often limited to the area rear of the tegula, but can extend along the entire side or, also commonly, be completely absent - Abdomen, T4, darkly translucent rim, longitudinal width, usually equal to or LESS than the width of the yellow stripe that runs from side to side basal to it, but not always - Entire thorax, yellow markings, VARIES from none to extensive markings, even on the scutum - Most often confused with N. luteoloides, but tends to come out later in the season (1)
 N. luteola - Head, antennae, flagellar segment 1, half or less the length of the 2nd flagellar segment - Last flagellar segment, with NO setae projecting beyond the tip - All segments, upper surface, BROWN to dark brown - Hind legs, tibial setae, mostly 5-7, short and fat, NOT extending beyond the nearby white hairs - NOTE - Tibial setae characters are difficult to determine without a lot of experience - Thorax, propodeum, rear face, EXTENSIVE YELLOW that runs into the propodeal triangle, something that rarely happens on the other species - Mesepisternum, small round mound at the top, usually completely YELLOW, other species usually with only a restricted amount or none at all - Scutum, NO yellow - Head, cheek, far more stongly carinate in comparison with other Nomada species - Most often confused with N. sulphurata (1)
 N. luteoloides - Head, antennae, length of flagellar segment 1, clearly more than half the length of 2nd flagellar segment - Last flagellar segment, with NO setae projecting beyond the tip - Hind leg, tibial setae, mostly 2-3 setae - NOTE - Tibial setae characters are difficult to determine without a lot of experience - Middle leg, femur, hairs on the bottom longer than one quarter of the width of the femur, this character is the most consistent way to separate from N. imbricata - Abdomen, T4, dark transluscent rim, longitudinally wider than the yellow stripe running from side to side just interior or basal to the transluscent rim - Thorax, yellow markings, VARIABLE, from none to extensive but ALMOST never with yellow on the scutum - Most often confused with N. imbricata (1)
Species for which only females are described - N. crudelis, N. electella, N. festiva, N. florilega, N. micheneri, N. miniata, N. sphaerogaster
 RECOMMENDED - Click here to eliminate these species from the system (17)
 Display these species (1)
State or province where bee was collected
 CT (15)
 DC (15)
 DE (15)
 IL (15)
 IN (15)
 KY (15)
 MA (15)
 MD (15)
 ME (15)
 MI (15)
 NC (15)
 NH (15)
 NJ (15)
 NY (15)
 OH (15)
 Ontario (15)
 PA (15)
 RI (15)
 TN (15)
 VA (15)
 VT (15)
 WI (15)
 WV (15)
 SC (12)
 GA (11)
 Nova Scotia (11)
 Quebec (10)
 New Brunswick (9)
 Prince Edward Island (9)
 AL (8)
 FL (7)
 MS (7)
 Newfoundland and Labrador (2)
Thorax, front leg, coxa, presence of a spine near where coxa joins trochanter, spine points back towards abdomen - note this spine is almost always large, but cloaked in hairs and can be difficult to see, if in doubt use a pin to confirm that a spine is there
 No spine - the majority of species (15)
 Long spine about 1/3 or more the length of the coxa (2)
 Short triangular spine less than 1/4 the length of the coxa (2)
Thorax, mesepisturnum, which is the plate below front wing, PRIMARY color
 Black (16)
 Yellow (6)
 Red (5)
Thorax, propodeum, rear face, PRIMARY color
 Black (17)
 Yellow (3)
 Red (2)
Thorax, scutellum, PRIMARY color
 Black (14)
 Red (10)
 Yellow (6)
Thorax, scutum, PRIMARY color
 Black (17)
 Red (5)
Time of year
 June-July (14)
 May or earlier (14)
 August or later (3)