Coleopterological Notices. 411 



tilled hy the hair. Abdomen densely pubescent, with a denser patch at the side 

 of each segment. 



Male. — Anterior tibiae strongly, inwardly bent near apical third, the inner 

 ontline being obtusely and angularly etnarginate, the outer strongly, evenly 

 arcuate toward apex ; intermediate tibire with a small internal notch near the 

 apex; anterior tarsi just visibly wider; abdomen broadly, very feebly im- 

 pressed in the middle toward base. 



Length 6.6-7.7 mm, ; width 3.5-4.2 mm. 



Arizona. 



The.anterior and middle tarsi in both male and female are densely 

 clothed beneath with long fine hair, which however is a little coarser 

 in the female; in both sexes the hind tarsi are coarsely spinose 

 beneath. In the female the anterior tibiae are feebly bent in apical 

 third, the inner line being broadly sinuate ; the entire tibia, how- 

 ever, is rather more robust than in the male. 



The coarse bristles of the dorsal surface, to which allusion has 

 been made, are of extraordinar}^ form, being triangular in trans- 

 verse section ; they are equal in thickness throughout the length, 

 and the apex is transversely truncate. 



The punctures of the elytral striae are very obscure unless the 

 specimen be rubbed, as in nature the integuments are covered with 

 a dull exudation. 



This species is not at all rai'e but appears to be rather local, being 

 confined to the Gila Yalley and the higher regions to the eastward 

 in southern Arizona. 



ULUS Horn. 



In this genus the form is more robust and elliptical than in 

 Trichoton, and the presence of well-marked fimbriae at the sides of 

 the pronotum and elytra, together with the very dense, coarse and 

 conspicuous pubescence, gives the species a peculiar habitus. The 

 fimbriaB are but rudimentarily developed in Trichoton and completely 

 wanting in Blapstinus. 



The sexual characters are very feeble, the anterior tarsi being the 

 only part which is noticeably modified in the male, and even here 

 the dilatation is so excessively slight as to almost elude detection. 

 The males are much less abundant than the females and are gener- 

 ally a very little less robust. 



The species burrow in loose sand or mud, the enlarged apex of 

 the anterior tibiae being well suited for this purpose. They are 



