NORTH OF MEXICO. 



393 



any dcprcssiou in the last abdominal segment. The terminal joints of the antenna; are 

 less compressed and not shorter. The antennae, as in most of the species of the genus 

 are shorter in the female. 



Length .4(5-. 53 inch. 



Southern States. 



IT. vcmistns, Say, Long's Exped. 2, 281!. 



Smaller than either of the preceding. The sides of the thorax are nearly straight, the 

 propionic coarsely but not continently punctured, and the elytra deeply striate, with con- 

 vex interstices. Antennas slender and as in undulatus. 



Length .30-38 inch. 



Not abundant in the Middle and Southern States. 



II. impolitus, Leo., Nefw Species, l:S2. 



Thorax nearly square;, sides nearly straight, apex very feebly emarginate. Elytra with 

 stria; of coarse punctures. Color black, slightly bronzed, sub-opaque. Antennee slender. 

 Propleuree rugosely punctured, punctures behind confluent in grooves. Last segment of 

 abdomen concave and hairy at apex. 



Length .50 inch. 



Texas. One male in my own cabinet, and a female in that of Mr. Hike. 



H. opacus, Lee., Proo. Acad. 1.839, 284. 



Thorax truncate in front, angles rounded; base almost truncate, angles rectangular; 

 sides rounded in front, slightly sinuate and converging behind; surface opaque black, 

 rugosely punctured. Three terminal joints of antenna' shorter, compressed, broader than 

 long. Pro pic ura' coarsely and rugosely punctured. Two forms of this species occur, one 

 apterous, the other winged. In the apterous form the thorax is more convex, the elytra 

 more robust, convex and shorter. The winged species has the elytra depressed, more 

 elongate and less rounded on the sides; the thorax is also less convex, rather broader and 

 with less rounded sides. I am unwilling at present to assign a distinct name to the latter 

 form, desiring a further accumulation of specimens. 



Length .52-70 inch. 



From San Francisco, Cal. 



II. punotipennis, Leo., New Species, 188. 



Similar in form to the preceding, but more depressed and smaller. Thorax slightly 



broader than long; disc densely but not rugosely punctured, sides rounded in front, 



slightly sinuate behind, base truncate, angles slightly acute, more prominent in any other 



of our species. The elytra an; depressed, slightly broader behind, moderately striate, 



amehi. rniLoso. soc. — vot,. xiv 99 



