108 GEO. H. HORN, M. D. 



Closely resembles ventricnhis and is distinguished by the sexual 

 characters of the male only, the characters of sculpture and color 

 are evanescent. 



Occurs at Camp Grant, Arizona, under Cottonwood bark. 



E. Tentriciilus, Say. — The description of the preceding species applies 

 equally well to this. The only permanent difference being in the male sexual 

 characters as shown in the table. I do not notice the fine longitudinal strigse 

 on the elytra of the specimens before ine, they are however very feeble in the 

 preceding. 



Male. — Last ventral semicircularly emarginate at middle. Last dorsal as in 

 punctipennis, (fig. 29). 



Female. — As in punctipennis. 



Occurs everywhere east of the Rocky Mountains, and varies in 

 color from varying degrees of maturity. 



IS,. Isevis, Lee. 



This also agrees with punctipennis in all its characters, sexual and 

 otherwise, except that the head, thorax and elytra, are entirely smooth 

 and devoid of sculpture. 



Occurs in the Gulf States. 



C01V0S0;»I.4 Kraatz. 



This genus is especially distinguished from all others of the group 

 by the immarginate abdomen, the other characters being those of 

 I'dchi/porua. 



In the endeavor to find some rational basis for the separation of 

 the species some hitherto unobserved characters have been noticed. 

 The feeble carination of the mesosternuin has already been mentioned 

 by Erichsou as occurring in several species, in these the mesosternum 

 is merely obtusely elevated without acute summit, and the body is 

 more depressed in form. One species only has on each elyiron a 

 marginal row of setigerous punctures. Those in which the elytra are 

 red at base have long rather stout seta) arising from punctures at the 

 sides of the abdominal segments, the unicolored species have short 

 hairs merely which might readily escape notice. The anterior and 

 posterior tibiae have each one terminal spur, slender and delicate, and 

 very short on the anterior tibiae. The middle tibiae may have either 

 one or, as in the majority, two spurs. The tips of the middle and 

 hind tibiae arc fimbriate with short equal spinulos which in one species 

 ascend a short distance along the inner margin of the tibiie as is seen 

 in many Curculionidae. On the outer side of each femur near the 

 knee there is always a moderately long stiff, bristly hair directed 

 downwards and iu those species with but one middle tibial spur there 



