North American Species of Trogophloeus. 341 



the apex; base broadly, feebly arcuate, two-thirds as wide as the disk, 

 and but just perceptibly narrower than the apex; the latter broadly 

 truncate; basal angles obtuse, narrowly rounded; apical obtuse, but not 

 rounded, and, when viewed sublaterally, very slightly subdentiform; 

 disk feebly convex, strongly impressed, rather finely, deeply, and 

 sparsely punctate, polished, the punctures separated by slightly more 

 than their own widths in the middle, and sparser and coarser toward 

 the sides. Elytra quadrate, very slightly wider, and nearly one-half 

 longer than the prothorax, impressed along the suture, coarsely, deeply 

 punctate, polished, the punctures widely separated. Abdomen broad, 

 but slightly narrower than the elytra, parallel; sides very feebly arcu- 

 ate; border rather narrow and deep; surface feebly convex, polished, 

 minutely reticulate, very finely and sparsely punctate. Legs slender, 

 tarsi moderate. Length, 2.9-3.2 mm. 



Pennsylyania (Allegheny Co. 2) ; New York (Brooklyn 7). 

 Dr. Hamilton and Mr. H. H. Smith. 



A common eastern species, easily identified by its coarse and 

 not dense elytral punctures, shining black integuments, and 

 large eyes, which almost attain the base of the head, differing 

 very greatly in this respect from the others most closely allied 

 to it. 



This formation of the sides of the head behind the eyes can- 

 not, however, be confounded with that of G-roup V, where the 

 neck begins at the eyes, generally without any nuchal constric- 

 tion; here the constriction is well marked, extending across the 

 head at some distance behind the eyes. 



The species morio of Erichson (Gen. Staph., p. 805) cannot 

 be the same as this, as the elytral punctures are stated to be 

 very dense (creberrime) in the former. These punctures in 

 quadripunctatus are unusually coarse, but at the same time 

 unusually sparse. 



Eaploderus laticolUs of Le Oonte (New Species Col., 55) is 

 identical with this species. It was described from a specimen 

 so excessively immature that the disk of the pronotum is drawn 

 entirely out of the usual form, presenting a broad impression on 

 the left and an equally broad but interrupted one on the right, 

 the two being separated by a decided ridge. The surface of the 

 abdomen is shrunken in such a way as to leave the sides vertical 

 and very deep, presenting the appearance of the same part in 

 Oxytelus. This appearance of the abdomen is due entirely to 



