The Pselaphid^ of North America. 29 



entire, countersunk, tine carina, circumambient sulcus con- 

 spicuous, ending posteriorly in round spongious foveas, twice 

 as distant as either from the eye; lateral margin overhanging 

 the eyes by its sharp carinate edge, punctate, more so on the 

 frontal margin. I'he front is narrowly concave in the middle, 

 and divided by a fine impressed line, declivous anteriorly to 

 the inter-antennal line, the declivity bilobed, and beset with 

 long convergent hairs; between these hair pencils, from the 

 depths of the emargination, two pairs of small triangular 

 teeth emerge, the outer ones smaller, inconspicuous. Sub- 

 frontal excavation deep, from the bottom of which a broad, 

 triangular, horizontal tooth stretches out, resting with the 

 acute point on the tip of the conical clypeal tuberosity, the 

 base of which rests again on the transverse labrum ; the cone 

 is just perceptibly higher than broad at the base, and laterally 

 separated by a groove from the lateral expansion (wing) of 

 the clypeus, which is concave, with a retuse angulated mar- 

 gin. The profile of the face resembles somewhat the form of 

 a sheep's face. Antennoe $ longer than head and prothorax, 

 first joint as long as the third, and more than twice as long as 

 the second, triangular, the free angle thorn-like, pendant; 

 second transverse, just visibly broader than long; third a Httle 

 thicker than the second; fourth to eighth obconical, gradually 

 shorter; eighth quadrate; ninth transverse, truncate at the 

 base, obconical; tenth larger, globose, as thick as the eleventh, 

 which is conical, as long as the two preceding together, ob- 

 liquely pointed. In the ? the frontal margin is interrupted in 

 the middle, continuous with the clypeal surface, which is 

 roundly margined anteriorly. The first antennal joint is con- 

 vex below, the third obconical, longer than wide, longer than 

 the second or fourth; tenth not as thick as the last joint, 

 which is two and one-half times longer, rounded at base, 

 pointed at tip. Prothorax as long as wide, median sulcus 

 deep, ending abruptly one-fourth from the neck, which is 

 carinate. Discal crest sharp, interrupted before the small, 

 sharp-pointed tubercles, which are nearer to the base than 



