122 MEMOIRS ON THE COLEOPTERA 



ulate; surface alutaceous, evenly and strongly convex, the lines rather 

 narrow and convex, the intervals broad, scarcely at all convex, 

 rather strongly creased, subrugose and with numerous rather coarse, 

 sparse and very irregular punctures; side margin in the form of an 

 elevated, obtusely rounded, prominent ridge extending almost to 

 the apex; epipleura feebly inflexed, deep as usual, more polished, 

 feebly rugulose and finely, sparsely punctate; abdomen with the 

 punctures sparse but larger than usual, the hind tibiae very feebly, 

 evenly bowed. Length (9) 27.0 mm.; width 12.2 mm. Colorado 



(La Junta) aucta n. sp. 



6 Form rather slender, black; head distinctly, obliquely bi-impressed 

 and also impressed on the median line basally, only feebly alutaceous, 

 finely, sparsely punctate, the minute hairs evident; prothorax fully 

 three-fourths wider than long, nearly as in data but with the sides more 

 gradually and broadly reflexed, coarsely, closely punctured and trans- 

 versely, moderately rugose, the edge with some small punctures only; 

 apex evenly sinuate and as wide as the base, widest at the middle; 

 apical angles very obtuse, scarcely at all everted; elytra evidently 

 more than twice as long as wide, evenly elongate-oval, gradually 

 obtusely acuminate behind, widest at the middle, the sides of the 

 base obliquely prominent; surface evenly, not very strongly convex, 

 only slightly alutaceous, the lines moderate, convex, the intervals 

 about twice as wide and equally convex, nearly smooth, the broadly 

 impressed lines confusedly, closely and rugosely punctured; side 

 margin obtusely elevated, joining the second line near the apex; 

 epipleura with a lower marginal convex ridge extending almost to 

 the base, this character being more developed than usual; abdomen 

 minutely, remotely punctate; legs rather stouter than usual, the 

 hind tibiae feebly bowed medially, strongly, closely punctato- 

 asperate. Length (cf) 25.0 mm.; width 10.0 mm. New Mexico 

 (Grant Co.) alaticollis n. sp. 



Difformis is placed as a subspecies of data on the opinion of 

 G. H. Horn and because the published characters give evidence of 

 no striking differential character, but its locality is rather uncertain. 



The genus Tisamenes, of southern Mexico, seems to be allied 

 rather closely to Gonasida, having a nearly similar form of body, 

 legs and prothorax, but differs in its striking and peculiar vestiture, 

 short antennae, stiff inferior hairs of the tarsi and in elytral structure, 

 to such an extent that there can be but little doubt of the mutual 

 distinctness of the two genera. Asida ingens Champ., will form 

 still another genus, probably not closely allied to either Gonasida 



or Tisamenes. 



Bothrasida n. gen. 



This genus and the following, though having the rough elytral 

 sculpture more characteristic as a rule of the Pelecyphorus series, 



