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"
In this small species the abdomen is largely or wholly red. It is probably most closely related to stenognatha, but the abdomen is redder and the apex of the median lobe of the clypeus is not or hardly notched.
Female: Inner margins of eyes slightly diverging below; facial line con- siderably longer than transfacial; under side of flagellum dusky; disc of clypeus shiny, with irreguar coarse punctures; median lobe of clypeus with strong longi- tudinal median carina which forks apically; notches separating median from lateral lobes of clypeus truncated, a little broader than deep, with sides only slightly diverging anteriorly; lateral lobes of clypeus small, sides at an acute angle with respect to one another but apex narrowly rounded; median lobe of clypeus large and broad, narrower at base than at middle, beyond middle taper- ing rapidly to the minutely emarginate apex; median lobe of clypeus, seen in profile, with upper maegin at an angle of about 1300 to adjacent disc of clypeus; labrum slightly broadened and shallowly emarginate at apex; hypos- tomal carinae each produced to a tooth behind; cheeks narrower than eyes, seen from side; anterior ocellus far posterior to midpoint between antennal bases and posterior edge of vertex; distance between posterior ocelli about equal to distance to nearest eye margin and to posterior edge of vertex; frons and vrtex closely punctate, frons more coarsely so than posterior part of vertex. Scutum and scutellum closely punctate, punctures aboue same size as those in ocellar region; mesepisterna with punctures separated by shiny surface; tegulae testaceous; wings clear; legs black; inner margin of inner hind tibial spurs finely serrate with about eleven small, oblique teeth, outer margin with about seven long teeth, basad to which are one or two small ones; outer hind tibial spurs with about four, low, very oblique teeth on each margin. Abdomen rather finely punctured, punctures of first two tergites dorsally separated by nearly their diameters; abdomen red; tergites one to five with apical bands of white pubescence; scopa white. Length nearly 5 mm.
Male: Facial line shorter than transfacial; inner margins of eyes converg- ing slightly toward clypeus except for lower ends which diverge; under side of flagellum brown; clypeus with median part not covered with pubescence; clypeus coarsely punctured, punctures separated by shiny surface; center of clypeus with longitudinal impunctate line; apical margin of clypeus thickened and shiny, broadly, shallowly emarginate; mandibles reddish subapically; apex of labrum faintly emarginate medially; cheeks much narrower than eyes, seen from side; distance between posterior ocelli somewhat greater than distance to nearest eye margin or to posterior edge of vertex; inner margin of inner hind tibial spur serrate with about eight small, oblique teeth, outer margin with six much larger, oblique teeth; both nmargins outer spur with four or five low, oblique teeth; punctation and coloration similar to female; pubescent bands of abdomen weak; sixth tergite with lateral teeth broadly rounded, exhibiting apical angle only weakly, median teeth broadly rounded, much broader than long (variable in paratypes, sometimes nearly as lontg as broad). Length nearly 5 mm.
Holotype female (Calif. Acad. Sci., Ent. No. 4735), allotype male (Calif. Acad. Sci., Ent. No. 4736), and seven paratypes: west of Lone Pine, Inyo County, California, 6500 feet elevation, May 19, 1937, on sand (C. D. Mich- ener). One paratype from four miles west of Lone Pine, May 19, 1937 (C. D. Michener). Additional specimens are from Mazourka Canyon, Inyo Moun- tains, Inyo County, California, May 25, 1937, on Parosela fremontii (C. D. Michener) and Argus Mountains, Inyo County, Californai, May 28, 1937
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