North American Species of TrogojMoeus. 381 



die. Elytra quadrate, feebly convex, nearly one-fourth wider and one- 

 half longer than the prothorax, slightly impressed at the suture toward 

 base, rather finely, deeply, and very densely punctate, the punctures 

 separated by from one-fourth to one-half their own diameters. Abdo- 

 men slightly narrower than the elytra and wider than the prothorax; 

 sides parallel and nearly straight; border moderate, shallow; surface 

 rather more shining than the other portions, finely and feebly reticu- 

 late, excessively minutely and not densely punctate. Length 1.5 mm. 



California (Hoopa Valley, Humboldt Co. 1). 



The dull character of the integuments of the head and pro- 

 notum is only equalled in the case of Irachypterus of the preced- 

 ing group, to which, however, the present species is in no way 

 allied. In general, even though the lustre may be somewhat 

 dull and alutaceous, the punctures will be found to be easily dis- 

 tinguishable, but in this case the minute obscure punctures and 

 reticulations or granulations are confusedly intermingled in such 

 a way as to give a very indistinct, although at the same time 

 homogeneous sculpture. 



63 T. uiiiformi§ Lee— Trans. Am. Ent. Soc, VL, p. 244. 



This is an aberrant species in the grouping here adopted, as 

 the tempora are slightly visible behind the eyes, the latter being 

 decidedly smaller, less prominent, and rather more finely faceted. 

 The prothorax has the same form to be seen in the preceding 

 species, otherwise it would have been placed next to pudicus. 



The three species which follow are remarkably different, and 

 constitute a rather isolated group, characterized by the slender, 

 linear, somewhat depressed form and distinctly bi-impressed pro- 

 notum. In general outline they resemble several of the very 

 slender forms of Croup IV, but may be easily distinguished by 

 their large, very convex, and prominent eyes. 



64 T, filum n. sp. — Very slender, linear, moderately convex, piceous 

 black; elytra rufo-piceous; legs dark brown, paler toward apex; an- 

 tennae fusco-piceous, slightly paler toward base; pubescence short, 

 dense, and rather distinct; integuments moderately shining. Head very 

 slightly narrower than the prothorax, feebly convex, minutely and 

 densely punctate; prominences rather small and strong; antennae slen- 

 der, feebly incrassate, rather small, not longer than the head and pro- 

 thorax; second joint as long as the next two together, fourth sub- 

 globular, tenth very slightly wider than long; eyes large, convex, prom- 



