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Discover Life 8 kinds match:
Melitta americana  [popup] female
Melitta americana  [popup] male
Melitta californica  [popup] female
Melitta californica  [popup] male
Melitta eickworti  [popup] female
Melitta eickworti  [popup] male
Melitta melittoides  [popup] female
Melitta melittoides  [popup] male

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note


REMAINING (number with state)
Female, M. eickworti vs. M. americana
 M. americana - The very large pits of the scutum are spaced much more densely, such that many of these pits are touching each other even in the posterior half, although this density is usually lower posteromedially - In direct comparison, scutellum more densely pitted in the anterior half - Pits on T1 and T2 TOUCHING to nearly touching, separated by less than 1 pit diameter, this most obvious when comparing the basal half of T2 - Pygidial plate with the raised area appearing to resemble a triangle (1)
 M. eickworti - The very shallow yet large pits of the scutum are spaced much more sparsely, such that almost no pits are touching each other and the overall pit spacing appearing to be highly irregular - In direct comparison, scutellum less densely pitted in the anterior half - Pits on T1 and T2 sparse, averaging well more than 1 pit diameter apart, this most obvious when comparing the basal half of T2 - Pygidial plate with raised area appearing irregular, with the base a strongly-convex bump and the apical portion being a raised line which extends towards the apex (1)
Female, head, clypeus, pitting
 Pitting dense and distinct lateral to the often-impunctate midline of the clypeus, easily seen and with an average pit spacing of at most about one pit diameter (3)
 Pitting sparse and shallow lateral to the often-impunctate midline of the clypeus, sometimes hard to see and with an average pit spacing well over one pit diameter (1)
Female, head, length and shape of mandibles
 Mandible equal to or shorter than length of eye, distal half wide and flat with a single tooth below the tip, distal half not shaped like a knife blade (3)
 Mandible longer than length of eye, distal half shaped as a pointed knife blade with two small teeth on inner margin (1)
Females, abdomen, T5, hair color
 Primarily dark, or if about equal in density then with the light hairs limited to the lateral sides of T5 (3)
 Primarily white, with dark hairs found only apicomedially (1)
Females, head, vertex, hair color, ignoring the small amount of black hairs which may or may not be present
 Hair color orangish to yellowish (2)
 Hair color white to slightly off-white (2)
Host plant - Make sure that the bee is ACTIVELY VISITING the flower, not simply resting upon the plant and note that both males and females may at times visit other plants for nectar
 Polycodium (4)
 Dalea (2)
 Encelia (2)
 Lycium (2)
 Lyonia (2)
 Sphaeralcea (2)
 Vaccinium - Blueberries (2)
 Vaccinium - Cranberries (2)
 Vaccinium stamineum (2)
 Viscainoa (2)
 Zenobia (2)
Male, abdomen, S6, shape of rim
 Apical rim broadly ROUNDED OUT, lacking a semi-circle shaped indent - If with any type of indent, then a very small v-shaped notch in the center comprising much less than 1/2 the rim (2)
 Apical rim with a semi-circle shaped indent across the middle 1/2 to 2/3 of the rim (2)
Males, M. americana vs M. eickworti, form of apical disc of S8
 M. americana - Apical disc with a distinct longitudinally-impressed line down the center, leaving the disc convex to either side - In direct comparison, larger, and with a much lower degree of black hairs on the face just interior to the inner edge of the eye and on the vertex (1)
 M. eickworti - Apical disc appearing either flat or concave throughout its entirety, not divided down the middle by an impressed line - In direct comparison, smaller, and with a much higher degree of black hairs on the face just interior to the inner edge of the eye and on the vertex (1)
Males, abdomen S6, pattern of hair
 Hair APPEARING as three distinct tufts, one apical and two lateral tufts, lateral tufts are, however, continuous with the apical tuft along the rim (1)
 Hair NOT arranged into three distinct tufts, although some apical hairs may be quite a bit longer than hair on the sides (1)
 Hair arranged into THREE DISTINCT TUFTS, one apical and two lateral tufts, lateral tufts are NOT continuous with the apical tuft along the rim (1)
Males, thorax, scutum, hair color
 With both light and black hairs, although the light hairs are dominant enough that the presence of black hairs may not be initially obvious, never equal in density to the light hairs (2)
 With both light and black hairs, the black hairs dense enough that their presence is obvious, often equal in density to the light hairs (1)
 With only light hairs (1)
Sex, number of antennal segments
 Female, 12 (4)
 Male, 13 (4)
State or province where bee was collected
 AL (6)
 CT (6)
 DC (6)
 DE (6)
 FL (6)
 GA (6)
 MA (6)
 MD (6)
 MS (6)
 NC (6)
 NJ (6)
 NY (6)
 Ontario (6)
 PA (6)
 RI (6)
 SC (6)
 TN (6)
 VA (6)
 WV (6)
 ME (4)
 NH (4)
 VT (4)
 AZ (2)
 CA (2)