\\t Canadian JEtttomotoj&fet. 



Vol. XXXIV. LONDON, MARCH, 1902. No. 3 



THE GENUS COCHLORHINUS, UHLER, AND ITS ALLIES 



(JASSID/E). 



BY E. D. BALL, FORT COLLINS, COLO. 



Some time ago Dr. Uhler was kind enough to lend me the types of C. 

 pinto for study in connection with some allied material from the National 

 Museum. This new material, while generically distinct, is so closely allied 

 to Cochlorhinus in many ways, and at the same time possessing more 

 nearly the typical Acocephaline characters, that it is now possible to 

 assign this unique genus to an approximately correct position in the group, 

 and give its characters from a comparative standpoint. 



It is apparently a rare form, as the three original females taken more 

 than twenty-five years ago are the only known specimens of the species. 

 To make this nondescript form more accessible to the workers in the 

 group, and as a basis for the comparisons in the descriptions that follow, 

 it has been thought best to give a comparative description of the genus 

 and species, and also a figure of the type, together with its more important 

 details. 



Genus COCHLORHINUS, Uhler. 



Uhler, Bull. U. S. Geol. and Geog. Surv. II., p. 358, 1876. Van 

 Duzee Cat., p. 2S9. 



Related to Acocephalus, but quite distinct; vertex slightly longer than 

 broad, acutely angled, disc flat, with the margins slightly elevated, ocelli 

 on the margin almost one-third the distance to the apex. Face retreating, 

 acutely angled with vertex, concave in profile. Front narrow, convex, a 

 distinct ridge extending to the apex, either side of which the margin is 

 depressed and slightly foliaceous. Pronotum transverse, coarsely trans- 

 versely rugulose, the margins nearly parallel, the anterior slightly more 

 curved. Elytra coriaceous, the nervures raised, apical margin broadly 

 rounding, with a narrow appendix; venation definite, two cross nervures 



