510 BtJLLETm UNITED STATES GEOLOGICAL SUEVEY. [Tol.Y. 



parts: a basal group, a transverse band about the middle, and a pos- 

 terior cloud. The under surface is clouded with dusky. Length, 6™™. 

 One specimen from the southern part of California, collected by Mr. 

 Hardy, and kindly given me by Dr. D. Sharp. 



OcHTHEBius DISCRETTTS Lec, Proo. Am. Phil. Soc. 1878, 379. — A form 

 of this species was found by Mr. Schwarz at Yeta Pass which differs 

 from the Californian specimens by the prothorax less coarsely punctured 

 and the elytral strise less deep. 



Gyeophjena (Encephaltjs). — Three specimens of three distinct spe- 

 cies, which seem referable to this group, were found by Mr. Schwarz 

 at Garland. As many species of GyrophcBna are still undescribed, I 

 prefer letting these remain so until a general synopsis can be prepared. 



Hypocyptus nigritulus. — Broader than long, convex, thinly pu- 

 bescent with fine gray hairs, antennge and legs entirely black, hind 

 angles of prothorax nearly rectangular, not rounded. Length, 0.6™". 



Yeta Pass. Differs from H. Crotchii Horn, Tr. Am. Ent. Soc. vi, 86, 

 by the color being entirely black, and hind angles of prothorax not 

 rounded. 



Mycetoporits tenuis? var. — The specimens from Yeta Pass dif- 

 fer from the Lake Superior ones described by Dr. Horn, Tr. Am. Ent. 

 Soc. vi, 122, by darker color, and by the antennae somewhat more 

 thickened externally. 



Deliphrum expansum. — Broad, depressed, narrower in front, pice- 

 ous shining. Head sparsely finely i)unctured, with short oblique occi- 

 pital lines, at the hind end of which, and almost on the neck, are the 

 ocelli. Prothorax twice as wide as long, rounded on the sides, which 

 are finely margined and slightly impressed and explanate behind the 

 middle; front angles much rounded, hind angles obtuse, base finely 

 margined; disc rather finely punctured with an obsolete impressed dor- 

 sal line, and a slight basal fovea. Elytra twice as long as the prothorax, 

 wider behind, truncate at tip, sutural angle rectangular ; punctured, 

 and indistinctly striate. Abdomen smooth. Tibiae distinctly spinulose, 

 joints 1-2 of hind tarsi but slightly elongated, 5th nearly as long as the 

 others united. Antennae thickened externally, 4th joint nearly rounded, 

 shorter than 3d, smaller than 5th, Length, 4™". 



Yeta Pass, Colo. The antennae are nearly as in Lathrimceum, but tlie 

 tibiae are distinctly spinulose, and the exx)osed part of the abdomen is 

 as long as the elytra. 



Olophrum jMARGiNATUiM {Kirhy), Eauua Bor. Am. iv, 89, &c. (vide 

 synon. Fauvel, Notice Entom. Staphyl. Am. du ISTord, 80). — ^Yeta Pass, 

 Colo. One specimen differs in having the sides of the prothorax very 

 distinctly sinuate near the base, while in two specimens from Alaska 



