108 Mr. G. C. Champion's Revision of the Mexican 



closely related to T. aeneipennis, and it is only separable 

 therefrom by its less rugose prothorax. The relatively 

 broad epipleura and very prominent marginal carina of 

 the elytra bring these insects near Asydates, Casey. 



23. Trichochrous subcuneatus, n. sp. 



(^. Elongate, subcuneiform, shining; nigro-piceous, with a 

 brassy lustre, somewhat tMckly clothed with erect blackish bristly 

 hairs intermixed with a few decumbent shorter pallid hairs, the 

 marginal cilia long. Head densely punctate, the epistoma smooth 

 and tumid along the middle ; antennae short, joints 5-10 transverse, 

 serrate, 5 larger than 6, 6 and 8 subequal, 9 and 10 much broader, 

 9-11 forming a definite club. Prothorax broader than long, large, 

 convex, narrowed anteriorly; coarsely, closely pimctate. Elytra 

 long, not wider than the prothorax, narrowed from the base, 

 narrowly, conjointly rounded at the apex ; closely, coarsely punctate, 

 the punctures becoming smaller towards the tip. Fifth ventral 

 segment unimpressed, truncate behind. Tibiae rough, sparsely 

 setose. 



$. Prothorax smaller, more narrowed anteriorly; elytra sub- 

 parallel in their basal half. 



Length 3-3i mm. (cj$.) 



Hab. Mexico, near the city [c^$], Aguas Cahentes city 

 [^]{Hdge). 



Described from a pair from Mexico city. This is the 

 only Mexican Trichochrous known to me with the elytra 

 narrowed from the base in the male. The vestiture is 

 almost wholly erect and dark. The female is very different 

 from the male, and it might easily be mistaken for another 

 species. 



24. Trichochrous setiger, n. sp. 



Pristoscelis nigroaeneus, Gorh,, Biol. Centr.-Am., Coleopt. iii, 

 2, p. 124 (part.). 



(J. Moderately elongate, shining, nigro-aeneous ; clothed with 

 scattered pallid decumbent hairs intermixed with many very long, 

 erect, bristly hairs, the marginal cilia also very long. Head closely 

 punctate, the epistoma slightly tumid in the middle ; antennae 

 short, joints 5-10 transverse, serrate, 5 larger than 6, 6-8 subequal, 

 9 and 10 wider, 11 ovate. Prothorax convex, transverse, roimded 

 at the sides, narrowing from a little before the base, closely, rather 

 coarsely punctate. Elytra very little wider than the prothorax. 



