THE PsELAPHID2 oF NoRTH AMERICA. 257 
flead smooth, as wide as long, tempora longer than the 
eye, arcuate, not prominent. Eyes not very prominent, front 
concave between the antennal tubercles, vertex convex, with 
two small, widely distant fovez in a line with the posterior 
margin of the eye, these foveze being connected with the 
frontal tubercles by a fine line. Aztenn@ 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. 
Llytra 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. Aédo- 
men short, segments nearly equal in length, convex, margin 
narrow. Legs strong, thighs clavate. ¢ last ventral deeply 
impressed, posterior tibize curved. 
Habitat. Virginia, Georgia, Texas. 
This species was previously described as Bythinus 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 fovez, 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, Awbé. Reddish-brown throughout, pubes- 
cence fine, long, especially on the posterior part of the abdo- 
men, body coarsely punctate. Length, 1.2. Plate XII., Fig. 
123. 
