arched, with a median carina, pustulated on sides. Scutellum large, 

 tricarinate, pustulated outside of the outer carinae. Elytra usually 

 half as long as the abdomen, leathery, truncate behind with the cor- 

 ners rounded; clavus merging with the corium, the nervures indis- 

 tinct, the outer sector forked. Wings lacking. Abdomen broad, 

 dorsum with one or two rows of more or less distinct pustules on sides 

 of each segment. Hind femora with two small spines. 

 Haplotype of the genus: Aphelonema simplex Uhl. 



The following key is taken from Ball. 

 Key to the North American species of Aphelonema 



I. Vertex short transverse, parallel margined. Front almost round, 

 slightly inflated and inclined so as to be slightly visible from 

 above 1. simplex Uhl. 



II. Vertex almost as long as the pronotum. Front oval or elongate, 

 vertical or retreating slightly. 



A. Front oval flat, median carina strong. 



B. Brachypterous elytra with few simple veins 



2. histrionica Stal. 



BB. Brachypterous elytra with a closely anastomosing net work 



of veins. Angle of clypeus with a slight acute protuberance. 



3. ruffosa Ball 



AA. Front elongate, lateral carinae only slightly curved, median 

 carina fading out above 4. bivittata Ball 



III. Vertex long, five angular. Front inflated, retreating, broader than 

 long, the pustular area much enlarged above. 



C. Vertex longer than the pronotum, definitely angular. Front 

 strongly retreating 5. nigriviridia Ball 



CC. Vertex about equalling the pronotum, weakly angled. Front 

 convex above, retreating below 6. viridis Dozier 



Aphelonema simplex var. simplex UHLER 

 (1875 Bui. U. S. Geol. & Geog. Surv., i, p. 356) 



A widely distributed species, recorded from N. J., Conn., 

 Va., Md., la., S. Dak. and Kansas. 



It is easily distinguished by its short and rather quad- 

 rate body. 



Vertex very short, four to five times as wide as long, trapezoidal, 

 with the front corners rounded. Frons as wide as long, hexagonal, tri- 

 carinate, the lateral carinae weakly bent and reaching to the tip of the 

 median carina; outside of the lateral carinae there is a row of pustules 

 which are very small and indistinct in the male but very large and 

 deep in the female; near the inner margin of the eye is another but 

 much shorter row of pustules. Clypeus weakly keeled in the middle. 

 Antennae short, brownish. Pronotum about twice as long as the vertex, 



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