Species account taken from: "A Revision of the Genus Ashmeadiella (Hymen., Megachilidae) Author(s): Charles D. Michener Source: American Midland Naturalist,Vol. 22, No. 1 (Jul., 1939), pp. 1-84"
Ashmeadiella alladenae Michener, 1936, Pan-Pac. Ent., 12:63, 8; Michener, 1936, Am. Mus. Nov., 875:14 (key); Michener, 1937, Ann. Mag. Nat. Hist., (10)19:406.
This is a small, black, rather densely pubescent species, with brown tarsi. The pubescence of the dorsum is often brownish or yellowish.
Male: Inner margins of eyes slightly converging toward the clypeus or nearly parallel, except for lower portions which diverge; face covered with pubescence; transfacial line longer than facial; head rather finely and closely punctate; flagellum light brown beneath; anterior margin of clypeus with slight emargination, shorter than basal width of clypeus and bounded by weak angles; mandibles dark red except for basal and apical extremities; anterior ocellus slightly posterior to midpoint between bases of antennae and posterior edge of vertex; distance between posterior ocelli equal to distance to nearest eye margin but distinctly less than distance to posterior edge of vertex; cheeks about half as wide as eyes, seen from side. Scutum with band of pubescence around it, broadened anteriorly but without seoarate spots of pubescence anteriorly; scutum more coarsely punctate than vertex, punctures separated by some shiny surface; mesepisterna punctured about as vertex; tegulae dark brown; trochanters and apices of femora brownish; hind tibial spurs very finely serrate on each margin; tarsi light brown. Abdomen finely punctured, punctures of posterior tergites about as coarse as those of vertex; lateral teeth of sixth tergite a little longer than broad; median teeth about twice as long as broad, parallel sided, distance between them at apices hardly greater than twice width of one of them at apex; abdominal bands of pubescence narrow, made up about equally of pubescence on bases and apices of tergites, so that bands often appear to be split. Length 4 to 4V2mm.
CALIFORNIA: Hastings Natural History Reservation, near Jamesburg, Santa Lucia Mountains, Monterey County, elevation 2000 feet, June 8, 14, and 24, 1938, one on Adenostoma fasciculatum and one on Lotus scoparius (C. D. Michener).
Type: male; Altadena, California, on loan deposit in the California Academy of Science
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