June tcoc] Casey: On North American Coleoptera. 151 



Body black, more depressed, the elytra more strongly and closely punctured, without 

 distinct rufous areas, almost evenly clothed with subdecumbent fulvous pubes- 

 cence, with very narrow and scarcely noticeable zig-zag bands of more cinereous 

 hairs in the usual positions ; prothorax of the male more transverse, more than 

 twice as wide as long; under surface black, the legs and antennce piceous -black. 

 Length 3.65 mm.; width 1.5 mm. Wyoming ( Laramie )...monticola, sp. nov. 



Cylindrica of Kirby (Saskatchewan), and angularis Mann., 

 (Alaska), are not known to me at present, the former is said to be 

 distinguished by its uniform elytral vestiture and was assigned by Kirby 

 to Attagenus ; it was considered to be the same as piceus by Gem- 

 mi nger and Harold, but is probably different, as it is said by the 

 author to rese/nble a Cryptophagus . The Attagenus angularis of Man - 

 nerheim, seems by the description to be uniformly pubescent, except 

 toward the hind angles of the prothorax, where the hairs become 

 whitish and condensed ; it cannot be the same d&jaynei, of the above 

 list, which latter was considered to be cylindrica, var. C, by Horn. 

 The falsa of Horn, is evidently a rare and local species, entirely un- 

 known to me, having the male antennal club slightly longer than the 

 funicle, with its first joint " extremely short " — language which will 

 not apply to any other species known to me — and the last joint more 

 than twice as long as the two preceding together and pointed at tip ; 

 it occurs at and near Sta. Barbara, California. 



The pronotum throughout the genus is coarsely and very closely 

 punctured, and there are generally two small and very shallow sub- 

 basal fovea at outer fourth, in which the punctures become still more 

 crowded and coalescent. The species are difficult to identify, as there 

 is a strong mutual resemblance throughout. Ampla, however, is a 

 very striking species, differing enormously in the relative size of the 

 sexes ; the females are the largest by far of the entire genus. Generally 

 the divergence of the sexes in this respect is not quite so noticeable as 

 in Attagenus, although the paucity of material before me will not 

 allow of definite statement in this regard. 



Trogoderma Lair. 



In this genus the body is oblong-oval, less elongate than in Perime- 

 gatoma but almost similarly clothed with variegated pubescence. The 

 species described by Dr. Jayne under the name Trogoderma simp/ex, 

 seems to have a somewhat unusual construction of the side pieces of 

 the presternum, and it should therefore form the type of a distinct 

 genus ; it is unknown to me. 



