406 Coleopterological Notices, V. 



Eyes larger, much longer and more prominent than the tempora. 



Elytra with the sides strongly divergent from the humeri, which are 



obliquely rounded to the prothorax. Pacific fauna rtlfipes Csy. 



Elytra with the sides feebly divergent, the humeri much more broadly ex- 

 posed, becoming transverse at base near the prothorax. Sonoran fauna. 



densus Csy. 



All of these species are minutely, very densely punctate and 

 pubescent. 



GEODROmiCUS Redt. 



The members of this genus include some of the larger of the 

 Omalini and are abundant in the western parts of North America. 

 As remarked by Mr. Fauvel, the form of the body recalls Lesteva, 

 or, it might be added, Orobanus, rather than Anthophagus with 

 which the species were united by Gemminger and Harold; in the 

 structure of the palpi they are somewhat intermediate between 

 Orobanus and Anthophagus and differ greatly from Lesteva. The 

 posterior tarsi, however, with the first four joints short and stout, 

 together scarcely longer than the fifth, will at once distinguish the 

 genus from Anthophagus. At the same time, integer, although 

 perfectly normal in tarsal and palpal structure, seems to diverge in 

 the direction of Anthophagus in the form of the prothorax, and a 

 divergence in the same direction is alao observable in the tarsus of 

 debilis. 



The American species known to me may be distinguished by^the 

 following characters : — 



Prothorax never transversely quadrangular, the disk not at all explanate 



near the hind angles. 



Pronotum with a more or less distinct impression along the median line, the 



prothorax often much larger and ot a different form in the male ; last 



joint of the maxillary palpi longer, subulate and much narrower than 



the apex of the third, although frequently nearly as long as the latter. 



Larger species, pale castaneous, clouded with blackish toward the apices 



of the elytra, the abdomen paler and with a large blackish subapical 



cloud. Atlantic regions 1)riinneilS 



Smaller, the abdomen black or slightly piceous and uniform in coloration. 

 Sides of the prothorax deeply sinuate posteriorly, becoming subparallel 

 near the base. 

 Pronotum strongly and closely punctate, the prothorax much larger 

 in the male than in the female. 

 Elytra more finely, moderately densely punctate ; anterior tibise 

 of the male slender, nearly equal in diameter throughout, fully 

 twice as long a,^ the tarsi, the latter moderately dilated. 



strictus 



