This black species is the largest in the subgenus. The median lobe of the clypeus is very short and broadly truncated, exceeded by the lateral lobes. A. barberi has a somewhat similar clypeus, although the lateral lobes are shorter than the median. That species, however, is much smaller than sculleni and has red markings on the abdomen. Female: Inner margins of eyes diverging below; transfacial line long&r than facial; flagellum dusky beneath; clypeus short and broad, trilobed, lateral lobes small, rather slender, bluntly pointed at apices, median lobe broad, truncated, shorter than lateral lobes; supraclypeal area and most of clypeus rather coarsely and not very closely punctate, anterior part of clypeus with smaller, somewhat elongate punctures; apical mandibular tooth brownish; third mandibular tooth represented by a beveled, rounded margin; labrum with apex emarginate, flattened dorsal surface smooth and polished; frons closely punctured; anterior ocellus posterior to midpoint between bases of antennae and posterior edge of vertex; distance between posterior ocelli equal to distance to eye margin and slightly less than distance to posterior edge of vertex; vertex closely punctate, a little more closely so than frons; punctures of cheeks as large as those of frons, separated by a little shiny surface; hypostomal cari- nae not produced to teeth posteriorly; cheeks nearly as wide as eyes seen from side. Scutum without pair of hair tufts anteriorly, a little more coarsely punctate than vertex, punctures separated by a little shiny surface; mesepisterna similarly punctulred; tegulae brownish; inner matgin of inner hind tibial spurs finely serrate with over fifteen small, oblique teeth, outer margin with about eight larger, oblique teeth; outer margin of outer hind tibial spurs with about seven small, very oblique teeth, inner margin with five or six somewhat larger, oblique teeth. Concavity at base of first tergite shallow, and its bounding carina weak, for an Ashmeadiella; first four abdominal tergites very finely punctate, punctures separated by more than their diameters; fifth and sixth tergites closely and a little more coarsely punctate; tergites one to five with apical bands of pubescence; scopa dull white. Length 9 mm.
Holotype (Calif. Acad. Sci., Ent. No. 4734) and one paratype: Burns, Oregon, elevation 4150 feet, July 2, 1927 (H. A. Scullen, Ore. Exp. Sta. Acc. 3710). This species is named for Prof. H. A. Scullen, who has kindly agreed to . the placement of the holotype in the California Academy of Sciences. The paratype has been returned to him
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