Tue PsELAPHID2 OF NorTH AMERICA. 5 
the head, including the eyes, very convex both ways, widest 
in the middle; sides strongly and evenly arcuate, shoulders. 
not prominent. Disk narrowly elevated at the base, with 
- three very small punctures on each elytron, sutural interval 
punctured, discal lines wanting. Addomen with the last seg- 
ment rounded at tip, last ventral with a deep transverse tri- 
angular cavity, slightly elevated in the middle at the bottom. 
Anterior tibiz of ¢ gradually dilated from the knee to the 
anterior third and emarginate above from this point to the 
end, leaving a strong sharp tooth. Tarsi with the second 
and third joints equal in length, intermediate tibie with a 
terminal spine, posterior tibiz arcuate. 9 with head evenly 
convex posteriorly, somewhat roof-shaped anteriorly, the 
highest part rounded, the fovez as in the ¢, the antennal 
tubercles nearly obsolete, the frontal margin triangularly pro- 
duced from the margin to the middle. Elytra very convex 
longitudinally, shoulders less prominent and the disk much 
shorter than in the ¢; the first abdominal segment is slightly 
longer than in the 4, the last aculeate, the last ventral semi- 
circular at the base. The genital slit is straight at the sides, 
angulate at the middle, and in the middle of the area is a 
large flat-bottomed, triangular depression, leaving large, oval, 
convex, oblique elevations at the sides. Antenne and legs 
simple and straight. 
Pilate De Big. 96)9:. 7°79," a.b. © 
For a knowledge of the 9 I am indebted to Mr. Henry 
Ulke, who found them in considerable numbers near Wash- 
ington. It seems to be confined to the Atlantic States. 
Bartrisus, Audé. 
Form of the body circulo-cylindroid, narrow, elongate, 
abdominal margins not parallel to each other, the outer edge 
rounded not reflexed; the inner one oblique, causing the bor- 
der of each elytron to appear triangular; the base of the 
dorsum is trifoveate, the elytra very convex, the discal lines 
never reaching bevond the middle. Prothorax with two or 
