458 Coleopterological Notices, V. 



than long, the fove?e large, deep, spongiose, at the middle, separated by nearly 

 one-half the total width, the arcuate sulcus deep, evanescent anteriorly 

 between the antennae, and gradually declivous to the labrum ; antennal 

 tubercles strong, crossed by a fine groove ; antennae nearly as long as the 

 head and prothorax, the funicle slender, third joint short, strongly obconical, 

 club normal, gradual ; eyes rather large, very prominent, longer than the 

 tempera, the latter moderately convergent behind them ; base broadly, 

 strongly sinuate. Prothorax wider than long, widest before the middle where 

 the sides are broadly rounded to the apex, convergent and nearly straight in 

 basal half; disk with an elongate fusiform median sulcus and a transverse 

 biarcuate sulcus behind basal third, the latter dilated at the middle and 

 foveate near the sides. Elytra large, subquadrate, nearly as long as the head 

 and prothorax, two-thirds wider than the latter, very nearly as long as wide; 

 discal stria coarse, gradually dilated toward base, vanishing at basal two- 

 fifths ; three basal foveae deep and well developed. Abdomen parallel, rather 

 longer and much narrower than the elytra, the segments equal. Length 0.75 

 mm. ; width 0.25 mm. or rather less. 



Khode Island. 



A single male taken near the seashore. The venter is feebly 

 flattened before the apex, and the terminal pygidium is small, flat, 

 narrow, elongate-oval and as usual enclosed completely at the sides 

 by the lateral portions of the anal or seventh segment. In the 

 male of fossulatus the venter is ver}^ feebly, broadly impressed near 

 the apex, and the flat pygidium is smooth, very large, but slightly 

 longer than wide, oval, more narrowly rounded behind and broadly, 

 very feebly arcuate anteriorly where it fits against the posterior 

 margin of the sixth segment. 



Atratus is allied to debilis but difi'ers from my single female of 

 that species in its intense black color, more feeble punctuation and 

 smaller head. In debilis the head is about as wide as the pro- 

 thorax. 



BIBLOPLECTUS Reitter. 



This genus as represented within the United States is undoubt- 

 edly valid, the species differing from Euplectus in their very minute 

 size, smaller head, more strongly narrowed front, less distant an- 

 tennae, and in the absence of a discal pronotal pit; the importance 

 of this last character has I think been underestimated. Another 

 important difference relates to the discal stria of the elytra, which 

 is wanting and replaced, as in Trimium and Trimiopsis, by a larger, 

 more or less elongate basal impression. The antennae, also, have a 



