101-4 



FAMILY LII. CERAMBYCIDzE. 



KEY TO TRIBES OF CALLIDIOIDES. 



a. Ligula horn-like ; eyes variable ; second joint of antennae more than one- 

 third as long as third. Tribe I. Asemini, p. 1014. 

 aa. Ligula membranous; eyes finely granulate; second joint of antennae not 

 more than one-third as long as third. 



Tribe IT. Callidiini, p. 1010. 

 Tribe I. ASEMINI. 



In this tribe the antenna? are densely punctured and pubescent, 

 with the second joint nearly half the length of third and the 11th 

 simple ; front coxa- transverse, with distinct trochantin, the cavities 

 open behind; scutellum rounded behind; males with fifth ventral 

 segment transverse and sixth segment visible; females with fifth 

 segment prolonged, sixth invisible. In this and many of the fol- 

 lowing tribes the character of the granulation of the eyes is much 

 used in separating the genera, In those which are "coarsely gran- 

 ulate" the lines between the facets are deeply impressed. In the 

 second group the granulations are much finer, the lines feebly im- 

 pressed, the surface of the eye appearing almost plane. Repre- 

 sentatives of three of the seven genera comprising the tribe have 

 been taken in the State, while those of another probably occur. 



KEY TO INDIANA GENERA OF ASEMINI. 



a. Color black or dark brown; form cylindrical, scarcely depressed; epi- 

 mera of mesothorax truncate at inner end. 

 h. Eyes not wholly divided, often deeply emarginate. 



a Eyes moderate in size, transverse, finely granulated and hairy ; an- 

 tennae finely pubescent. Asemum. 

 cc, Eyes large, coarsely granulated, not hairy. IV. Criocephalfs. 

 hb. Eyes divided, apparently four in number, rather finely granulated. 



V. Tetropifm. 



aa. Color pale yellowish; form depressed; epimera of mesothorax narrowed 

 and acutely pointed at inner end. VI. Smodicum. 



Asemum mmstum HaJd., black, opaque, thorax rounded at sides, 

 length 12-15 mm., ranges from "Lake Superior to Florida and 

 eastward. " 



IV. Criocephalus Mtils. 1839. (Gr., "a ram + head.") 



This genus comprises seven rather large, subcylindrical species, 

 having the eyes coarsely granulated, not hairy and the thorax with 

 two to four large and shallow depressions on the disk. One of the 

 seven has been taken in Indiana and another may occur. 



