244 GEO. H. HORN, M. D. 



])lacing it in Epitrix, a strict interpretation of characters, as at pres- 

 ent nsed, makes it necessary to place it for the time in Crepidodera. 

 Three specimens, Illinois. 



EFITRIX Foudras. 



The differences between this genus and Crepidodera are very fee- 

 ble, and in fact there is but one constant. While in that genus the 

 upper surface is entirely glabrous, in this the upper surface has short, 

 semi-erect hairs, sparsely placed over the thorax and at the sides, 

 and on the elytra arranged in a single row on each interval. The 

 frontal carina is feeble and the tubercles are absent ; there is, how- 

 ever, an oblique ridge each side extending from the end of the frontal 

 carina to the eye, limited above by a well impressed line, the two 

 forming together a broad V. The anterior angles of the thorax ai-e 

 conspicuously obliquely truncate, the truncation posteriorly limited 

 by a dentiform process. The ante-basal impressions are variable 

 according to the S{)ecies, well marked in some or feeble, and almost 

 obliterated in others. The elytra are punctato-striate with punc- 

 tures of variable size according to si)ecies, the intervals rarely wider 

 than the striie and with a single row of finer punctures from which 

 the seriate hairs arise. 



The sexual characters are rather feeble ; the male has the first 

 joint of the anterior tarsus bi'oader than in the female, the last ven- 

 tral segment shorter and subtruncate, while the surface of the ab- 

 domen is less distinctly punctate than in the female. 



The species are not numerous ; those of Europe live on plants of 

 the order Solanacese. Harris states that cucumeris injures cucumber 

 vines. It is probable that the natural food plants of our species are 

 of the same order as those of Europe. 



The following table will assist in the recognition of the species : 



Species of piceous surface. 



Thorax very densely and coarsely punctate; ante-basal impression feeble 



fuse Ilia. 

 Thorax not densely punctate, the punctures well separated. 

 Ante basal impression well marked. 



Elytral striae rather deep, the punctures coarse, close and quadrate; punc- 

 tures of thorax close, thoujih separated lobata. 



Elytral strife, especially those nearest the suture, very feeble; the punc- 

 tures round and not crowded ciiciiiiieris. 



Ante-basal impression very feeble. 



Species quite small ; thoracic punctures close, but not crowded. ..brevis. 



