and Central American Malachiidae and Melyridae. 95 



segment unimpressed, truncate at the apex. Tibiae rough, feebly 

 spinulose and densely setose externally. Anterior femora tliickened 

 and truncated at the apex within. 



$. Pro thorax small, transverse, narrowing from the base, obso- 

 letely crenulate or serrulate at the sides anteriorly, closely punctate ; 

 the elytra much wider than the prothorax, greenish or violaceous ; 

 legs shorter and more slender; anterior femora simple. 



Length 3|-4| mm. 



Hah. Mexico, Saltillo in Coahuila {^ $), Villa Lerdo in 

 Durango {,^) (Hoge). 



Five males and three females. Very near T. (Cradytes) 

 longicollis, Casey, from Arizona, the females referred to 

 it differing from the males in a similar way, the prothorax 

 ((^) strongly denticulate at the sides anteriorly. T. 

 longicollis, however, is described as having the latter 

 {^) gradually and broadly arcuate and convergent at apex, 

 and with the angles completely obhterated, whereas in the 

 present insect the prothorax is abruptly and obhquely 

 narrowed before the apex. The Arizona insect, moreover, 

 is said to be black and considerably smaller ; T. denticulatus 

 has metalhc elytra. 



2. Trichochrous hamatus, n. sp. (Plate II, fig. 22, ^, 

 prothorax.) 



cJ. Elongate, parallel-sided, shining ; black with an aeneo- cupreous 

 lustre, the antennae and legs fusco -ferruginous ; clothed with coarse, 

 shaggy cinereous hairs intermixed on the head and prothorax and 

 the base of the elytra with erect blackish setae. Head closely 

 punctate; antennae short, the joints preceding the terminal one 

 broad and strongly transverse. Prothorax subquadrate, along the 

 middle line nearly as long as broad, obliquely and abruptly narrowed 

 anteriorly to the advanced apical portion (as seen from above) and 

 armed on each side at this place with a long, curved, downwardly 

 and forwardly directed, hook, the margins obsoletely crenulate, the 

 hind angles obliterated; rugulose, and finely, closely confusedly 

 punctate. Elytra moderately long, widest at the base, transversely 

 rugose and coarsely, closely punctate. Beneath densely punctate, 

 the anterior portion of the prosternum transversely wrinkled; fifth 

 ventral segment unimpressed, truncate at the apex. Tibiae rough, 

 feebly spinulose and densely setose externally. 



Length 4^ mm. 



Hab. Mexico {Truqui, in Mus. Brit.). 



