The Pselaphid^ of North America. 257 



Head smooth, as wide as long, tempora longer than the 

 eye, arcuate, not prominent. Eyes not ver}'^ prominent, front 

 concave between the antennal tubercles, vertex convex, with 

 two small, widely distant foveas in a line with the posterior 

 margin of the eye, these foveee being connected with the 

 frontal tubercles by a fine line. Antenn<v as long as the head 

 and prothorax, first and second joints stronger, subequal in 

 length. Third to ninth transverse, moniliform, equal, tenth 

 broader, not longer, eleventh very large, ovate-acute. Pro- 

 thorax nearly globose, truncate at the base, polished, smooth, 

 with a zone of basal punctures and a deeper median puncture. 

 Elytra twice as long as the prothorax, which they slightly 

 exceed in width across the low shoulders. Across the tip 

 they are as wide as long, convex, sutural lines close, punc- 

 tured like the disk, discoidal basal impressions faint. Abdo- 

 men short, segments nearly equal in length, convex, margin 

 narrow. Legs strong, thighs clavate. 5 last ventral deeply 

 impressed, posterior tibia? curved. 



Habitat. Virginia, Georgia, Texas. 



This species was previously described as BytJiimis zonatus, 

 Brend. 



NisAxis, Casey. 



This genus was established by Capt. Thos. L. Casey, by 

 reason of Reitter's division of the genus Bryaxis. In the 

 opinion of many, this should be regarded as only a section of 

 Bryaxis, but it seems to us entitled to recognition. It presents 

 the following characters: 



Vertex without fove^e, the frontal margin obliquely decli- 

 vous, gula bicarinate. The ventral segments are four, the 

 two basal ones very large, the third hardly visible except at 

 the sides. The fifth may be ankylosed to the preceding, or 

 wanting. 



N. TOMENTOSA, AiidS. Reddish-brown throughout, pubes- 

 cence fine, long, especially on the posterior part of the abdo- 

 men, bodv coarsely punctate. Length, 1.2. Plate XII., Fig. 

 128. 



