172 MEMOIRS ON THE COLEOPTERA 



minute punctures similarly granuliform; abdomen similarly but more 

 closely punctulate and subpubescent; legs rather short and slender, 

 the anterior tibiae scarcely at all everted and merely acute externally 

 at apex. Length (cf, 9) 13.5-14.5 mm.; width 6.3-6.9 mm. 

 Arizona (Tugson), Wickham. [Asida wickhami Horn]. 



wickhami Horn 



4 Body black, shining; prothorax variolate, longer than in Euschides 

 marginatus, the sides subangulate and reflexed, crenulate; base 

 truncate; elytra impunctate, obovate, the suture elevated, flat above,, 

 the sides and apex strongly declivous; surface with a very acute 

 costa, which becomes confluent with the marginal carina anteriorly, 

 and, posteriorly, curves toward the suture. Length 18.7-22.5 mm. 

 California (Colorado Desert). [Pelecyphorus confluens Lee.]. 



confluens Lee. 



The last species of the table is unknown to me but it appears to 

 be a member of this genus, although confessedly rather aberrant 

 in size and sculpture. The posterior ramus of the marginal carina 

 in liberta and wickhami is not an inner offset or branch of the carina, 

 but is the inner of two equal branches due to the symmetrical bi- 

 furcation of the carina, a rather peculiar structure, not observable 

 elsewhere in the tribe so far as known to me. The Asida fur cata 

 of Champion, from Durango, Mexico, belongs to this liberta group 



of the genus. 



Trichiasida n. gen. 



The noticeable distinguishing features -of this genus include the 

 more or less pubescent integuments and the moderate or rather 

 small, transverse and obtrapezoidal mentum, mounted upon a long 

 and well developed, deeply sinuate gular peduncle and sometimes 

 leaving much open space between its sides and those of the buccal 

 opening, or in close contact with the latter anteriorly or even dilated 

 anteriorly around their apices as in horrida, the sides of the buccal 

 opening always rather short and broadly obtuse; this variability 

 in the form of the mentum within certain limits has been referred to 

 previously under Euschides. In addition, the antennae are pale and 

 very slender as a rule, with the tenth joint abruptly wider, conform- 

 ing to the usual type in European Asida, and the outer angle of 

 the anterior tibiae is almost invariably everted and acutely spiculi- 

 form, the outer edge of the tibia in general somewhat serrulate. 

 There may or may not be a prominent elytral margin and the surface, 

 normally, is devoid of cariniform costae, though generally having 

 feebly tumescent lines, which, in some groups, become more com- 



