APPENDIX. 281 



excepting that the anterior angles of the thorax are sub- 

 acute; striae of the elytra as in the preceding ;yec/ as in the 

 preceding, excepting that the anterior tibiai are gradually 

 very much dilated at tip, and not somewhat abruptly di- 

 lated near the tip, the line of the exterior edge is there- 

 fore nearly rectilinear. 



Length from one-fifth to less than one-fourth of an inch. 



Var. «. thorax dull piceous. 



Var. /3. entirely piceous. 



EPITRAGUS, Lair. 



E. canaliculatus. Thorax with two lines and lateral 

 edge elevated. 



Inhabits United States. 



% Body blackish-brown, more or less bronzed, with 

 very numerous short cinereous hairs; thorax broader be- 

 hind, somewhat lobed at the scutel; angles produced, very 

 acute; lateral edge rectilinear, elevated; anterior edge ab- 

 ruptly undulated ; disk with two elevated lines which be- 

 come obsolete behind and originate each in a flattened and 

 porrect tubercle on the anterior edge; elytra with dilated, 

 slightly impressed grooves. 



Length nine-twentieths of an inch. 



Var. «. grooves of the elytra obsolete. 



The female is very different in appearance from the 

 male, by being entirely destitute of the elevated lines and 

 edges of the thorax, and of the undulated form of the ante- 

 rior edge of the thorax. The elevated lines and lateral 

 edge give the thorax the appearance of having three di- 

 lated grooves. This insect is found in Pennsylvania, but 

 is more frequent in the southern states; I also obtained 

 specimens in Missouri. 



