North American Sjjecies of Trogophlceiis. 361 



finely and not very strongly punctate; punctures twice as wide as 

 those of the prothorax and separated by much more than their own 

 diameters. Abdomen distinctly narrower than the elytra, very elongate; 

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

 feebly reticulate, minutely and moderately densely punctate. Legs 

 very short. Length 1.7 mm. 



Texas (Austin 1). 



One of the most slender and elongate species of the genus. 



39 T, detraetus n. sp.— Very slender, linear, piceous-black; elytra 

 almost imperceptibly paler; legs flavate; antennae fuscous, paler at 

 base; pubescence fine, very short and moderately dense; integuments 

 feebly shining. Head as wide as the prothorax, slightly wider than 

 long, rather convex, finely and very densely punctate; prominences 

 moderate; eyes small, feebly convex, and scarcely at all prominent; 

 tempora about as long, broadly rounded and as prominent as the eye; 

 antennae short, robust, not as long as the head and prothorax; outer 

 joints strongly transverse; second joint as long as the next two together 

 and decidedly more robust, third but slightly longer than wide, fourth 

 transverse. Prothorax nearly one-fourth wider than long; sides feebly 

 convergent from apex to base, feebly and almost evenly arcuate; base 

 feebly arcuate, nearly five-sixths as wide as the apex ; the latter very 

 feebly arcuate; apical angles very narrowly rounded; basal more broadly 

 so; disk with very slight traces of impressions, minutely and densely 

 punctate; the punctures separated by nearly twice their widths. Elytra 

 distinctly wider and about one-half longer than the prothorax, slightly 

 longer than wide, very feebly impressed, very finely and rather 

 densely punctate, the punctures rather larger than those of the pro- 

 notum and separated by about twice the interval. Abdomen rather 

 broad, but slightly narrower than the elytra, parallel; sides straight; 

 border moderate, very shallow; surface finely reticulate, minutely and 

 rather densely punctate. Legs very short and somewhat robust. Length 

 1.5 mm. 



Iowa (Cedar Rapids 2). Dr. E. Brendel. 



Closely allied to indigenSy but differing in its darker color, and 

 especially darker antennae, in the apical angles of the prothorax, 

 which are here narrowly rounded, in its proportionally shorter 

 tempora, slightly sparser punctuation, and much shorter an- 

 tennae. The male is rather more slender than the female, with 

 a distinctly narrower abdomen, but both sexes are slightly more 

 robust and with a proportionally narrower abdominal border than 

 indigens, 



ANNALS N. Y. ACAD. OF SCI., IV. Issued March, 1889. 



