ENTOMOLOGICAL SECTION. XIX 



tips, apical and lateral margins of first segment of abdomen, broad apical 

 margin of remaining segments, that on the second broadly dilated on each 

 side of middle, and the venter entirely except base of second segment, all 

 sulphur-yellow; clypeus large, broad, convex, broadly rounded at tip, labial 

 palpi fringed with long pale hair; flagellum fulvous beneath; vertex rather 

 thickly clothed with pale pubescence; anterior angles of prothorax tubercu- 

 late; wings hyaline, costa yellow, extreme apex narrowly fuliginous; abdo- 

 men shining, sparsely punctured, first segment subcampanulate. Length 

 .45 inch. 



H<ih. — Nevada. H. K. Morrison. 



Pterochilns Morrisoni.— 9.— Small, black, opaque; head broader 

 than thorax; clypeus except sometimes at tip, mandibles, palpi, lower anterior 

 orbits, broad posterior orbits, scape beneath, upper margin of prothorax, tegulse, 

 two square spots on scutellum, postscutellum, two spots on metathorax, broad 

 oblique subinterrupted line on sides of pleura, spots on middle coxse beneath, 

 anterior femora except base above, intermediate pair at tip beneath, tips of pos- 

 terior pair, tibise and tarsi, and broad apical margin of abdominal segments, 

 that on second widened laterally, all sulphur-yellow; clypeus subrhomboidal, 

 subdepressed towards tip which is broadly truncate; labial palpi fringed with 

 long pale hair; flagellum more or less fulvous, generally fuscous above; wings 

 subhyaline, costa yellowish, apex smoky ; abdomen closely punctured, first seg- 

 ment campanulate. Length .30 — -.35 inch. 



%. — More slender, eyes larger, face narrower; clypeus and mandibles en- 

 tirely yellow; antennae long and robust towards tip, which is incurved but 

 not hooked, flagellum pale fulvous beneath and at extreme tips above; all the 

 coxae more or less yellow; otherwise like the 9- Length .30 inch. 



Hah. — Nevada. H. K. Morrison. 



Pterocltiliis biplagiatus. — 9- — Medium, black; clypeus except nar- 

 row apical margin, dot on base of mandibles, spot on lower anterior orbits, 

 line on upper posterior orbits, two dots above base of antennae, scape beneath, 

 uj>per margin of prothorax, tegulae except median dot, round spot beneath, two 

 spots on scutellum, postscutellum, spot on each side of metathorax posteriorly, 

 tip of femora, tibiae except spot behind, tarsi, apical margin of abdominal seg- 

 ments 1 — 5 widened laterally, those on 2 — -5 more or less deeply emarginate 

 on each side anteriorly, spot on sides of first segment at base confluent with 

 lateral margin, an ovate spot on sides of second segment, spot on apical seg- 

 ment, and narrow apical subinterrupted margin of ventral segments 2 — 4, all 

 pale yellow; clypeus subrhomboidal, truncate at tip, mandibles dull reddish 

 at tip; labial palpi dull fulvous, fringed with pale hair; mesothorax densely 

 confluently punctured; wings yellowish-subhyaline; abdomen shining, almost 

 smooth, impunctured, first segment broad. Length .60 inch. 



•^ .— More slender, head and thorax clothed with pale pubescence; clypeus 

 entirely, mandibles except tips and palpi yellow; antennae long, robust to- 

 wards tip which is incurved but not hooked, flagellum entirely black; coxae, 

 trochanters, four anterior femora except base above, tips of posterior pair, and 

 tibiae and tarsi entirely, yellow; venter mostly yellow; otherwise much like 

 the 9- Length .45 inch. 



Hab. — California. Henry Edwards. 



