The Pselaphid/e of North America. 69 



E. coNFLUEXs, Lec. Form slender, depressed, sides of the 

 elytra and abdomen parallel; surface punctulate. Length 1.2 

 to 1.5 mm. Plate XL, Figs, no and 112. 



5 Head broader than long, trapeziform, one-fourth shorter 

 from the frontal marmn to the base than the width across the 

 very prominent tempora; base sinuate and shortly carinate in 

 the middle, tempora acutely rounded; eyes not prominent, sides, 

 from the tempora to supra-antennal tubercles, nearly straight, 

 slightly sinuate; frontal margin straight, slightly produced in 

 the middle, as wide as the head is long; disk very coarsely 

 punctured, flat, the inter-ocular foveas very small, mutuallv as 

 distant as either from the eye; the grooves are parallel, broadly 

 arcuate in the transverse frontal portion, included space smooth 

 or less deeply punctured, mandibles prominent. Antcnnceono.- 

 third longer than the head, third to eighth joints transversely 

 monihform; ninth and tenth gradually wider; eleventh ovate, 

 truncate at the base, where it is sHghth' wider than the tenth 

 and four times wider than the funicle, the length and width 

 about equal. Prothorax narrower than the head, widest 

 before the middle, as wide as long, sides rounded in the middle, 

 straight and convergent toward the neck and base, sHghtly 

 sinuate opposite the lateral foveas; base broadly arcuate; disk 

 punctate with a deep oblong fovea before the middle, running 

 out into a shallow, longitudinal sulcus, reaching into the tri- 

 angular median fovea one-fourth from the base; lateral foveae 

 large, deep, very faintly connected with the median ones. 

 Elytra densely pubescent, fainth* punctulate, as long as wide, 

 sides nearly parallel; disk flat, sutural Hues nearly straight, 

 parallel, base trifoveate, discal lines deep near the base, not 

 reaching the middle; shoulders prominent. Abdomen longer 

 than the elytra, the first and second dorsals carinate. The 

 sexual differences are conspicuous, the head of the ^ being 

 shorter, the mandibles strong, prominent, the antennse more 

 slender, and the abdomen shorter; the third ventral segment is 

 bisinuate in the middle behind, the fourth depressed at the 

 middle of the base and covered by tufts of hair; the fifth has 



