A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 33 



Pronotum nearly twice as wide as long, subequal in width at base and apex, 

 widest along middle; sides parallel at middle, arcuately converging anteriorly 

 and posteriorly; anterior margin slightly sinuate, with an indistinct, broadly 

 rounded, median lobe; base slightly, arcuately emarginate on each side, the 

 median lobe slightly produced, and subtruncate in front of scutellum ; disk 

 moderately convex at middle, slightly flattened toward lateral margins, without 

 distinct depressions or callosities, but with a smooth, narrow, median line 

 extending from base to middle ; surface glabrous, coarsely, shallowly, rather 

 densely punctate, more or less rugose toward sides, the intervals finely 

 granulose. 



Elytra slightly wider than pronotum, twice as long as wide, widest behind 

 middle ; sides slightly diverging from humeral angles to behind middle, then 

 arcuately converging to tips, which are separately broadly rounded ; lateral mar- 

 gins not distinctly serrate; humeral angles broadly rounded; basal depressions 

 broad and rather deep ; humeral depressions broad and very shallow : disk mod- 

 erately convex ; surface sparsely clothed with short, erect hairs, coarsely, rather 

 densely punctate basally, more finely punctate apically, the intervals densely 

 granulose. Each elytron with a vague median depression, and three or four 

 vaguely indicated, longitudinal costae. 



Abdomen beneath sparsely, finely punctate, sparsely clothed with short, 

 recumbent hairs, without smooth, lateral callosities, the intervals finely granu- 

 lose ; last visible sternite broadly, deeply, arcuately emarginate at apex, without 

 a submarginal ridge, the lateral margins not serrate ; eighth tergite shallowly, 

 broadly emarginate at apex, densely, coarsely punctate, but not longitudinally 

 carinate. Prosternum coarsely, densely punctate, rather densely clothed with 

 long, semierect hairs, with a distinct, broad, short lobe in front. Anterior 

 femur with a broad, obtusely triangular tooth, which is not dentate on outer 

 margin. Anterior tibia arcuate, with a rather long dilation at apex; middle 

 and posterior tibiae straight, the middle one expanded at apex. 



Length 9.5 mm., width 4 mm. 



Redescribed from a male paratype in the California Academy of 

 Sciences. 



Female. — No females have been examined by the writer, but Van Dyke in his 

 original description says that the female differs from the male in having the 

 prosternum less closely punctured at the middle, and more finely, sparsely 

 pubescent, the last visible sternite either finely notched or but faintly emarginate 

 at the apex, and the anterior tibia slightly arcuate and without a dilation 

 at the apex. 



Type locality. — Mt. Hoffman, 1,100 feet altitude, Yosemite National 

 Park, Calif. ; type in the California Academy of Sciences. 



Distribution. — Described by Van Dyke from seven specimens col- 

 lected at the type locality, July 30, 1933, by R. M. Bohart. The only 

 specimen seen by the writer was the male paratype loaned for study 

 by the California Academy of Sciences, through the kindness of 

 Dr. Van Dyke. 



Host. — Unknown. 



This species is closely allied to cyanella and has been separated 

 from that species because the lateral" margins of the elytra are not 

 serrate, but this seems to be a more or less variable character in 

 cyanella. The only specimen of boharti examined differs from cyan- 

 ella in having the tooth on the anterior femur not serrate on the outer 

 margin, the sides of the male genitalia more arcuately expanded, and 

 in being slightly larger than most of the specimens of cyanella 

 examined. Van Dyke gives the length of boharti as from 8 to 10 

 mm., but one of the specimens of cyanella in the Horn collection is 

 9.5 mm. long, and Horn (1886) states that the largest specimen he 

 examined was in the Edwards collection, from which he made his 

 figure, and which measured 11.5 mm. in length. 



416206—42 3 



