AMERICAN COLEOPTERA. 41 



KTotes on some genera of €ERA]VIBY€IDi£ of the United 



States. 



BY GEORGE H. HORN, M. D. 



The following notes have been prepared to assist those students in 

 the determination of their species who have not access to large col- 

 lections for comparison. 



A number of the more difficult and large genera have already 

 been tabulated by Dr. Leconte. In those here selected although the 

 species are not numerous in any one there has been almost as much 

 difficulty in determining the species as in Leptura, from the fact 

 that the descriptions are scattered and too many species have been 

 described from the insufficient material in cabinets at the time. 



The number of new species described is necessarily very small from 

 the fact that the field has but recently been so thoroughly gone over 

 by Dr. Leconte. 



In the preparation of the following remarks I have had the same 

 types before me that were used by Haldeman and Leconte while my 

 own cabinet has served to increase the number of specimens and 

 enable specific limits to be better defined. 



BATYIiE Thorns. 

 Having lately had occasion to examine a large number of speci- 

 mens of our smaller red species I became convinced that they were 

 all variations of one form. It is proposed to unite them under Say's 

 name. 



B. SUtnralis Say. (Callidium). 



The form described is that most commonly found in the Western 

 States and Texas. 



" Rufosanguineous, hairy; antennae, suture, postpectus and feet 

 black." (Elytra with coarse, distant punctures.) 



The extent of the sutural black mark varies greatly, sometimes 

 forming a narrow line or again, narrow at base and gradually be- 

 coming wider and even covering the apical third of the elytra. 

 (Fearmlli, Bid.) 



I have lately received from Mr. H. K. Morrison a specimen collected 

 in the southwestern part of Colorado, in which the thorax is entirely 

 black, so that only the abdomen and elytra are red and the suture in 

 the latter is narrowly black. 



TRANS. AMER. ENT. SOC. Til. (6) JANUARY, 1878. 



