158 



FAMILY IT. OABABLD/E. 



Conte table. They were in all probability revised by Dr. Horn 

 without publishing the result." 



The following table is based largely upon that of LeConte. and 

 was drawn up for the specimens as named by Mr. Liebeek and 

 afterward reviewed by Mr. Fall. Comparison was also made with 

 those in the LeConte collection at Cambridge. 



KEY TO INDIANA SPECIES OF BRAC'HYNUS. 



(/. Larger species, 10 to 15 mm. 



I). Elytra gradually but distinctly widened behind, costate or subcostate. 

 c- Elytral humeri distinct but rounded; thorax widest just in front 

 of middle. 



(7. Thorax not longer than wide, the sides in front much rounded. 

 e. Abdomen fuscous r antennse with the fourth and following 

 joints darker. 278. alternans. 



ee. Abdomen and antennae pale. 279. tobmentaeius. 



dd. Thorax distinctly longer than wide, its sides less rounded. 



280. DEYBOLLEI. 



cc. Humeri of elytra narrow, indistinct; thorax widest one-fourth 

 from apex. 281. ameeicanus. 



hi). Elytra but slightly widened behind, the sides parallel or nearly so. 

 the humeri distinct. 

 f. Thorax very wide in front, suddenly narrowed behind the middle; 



elytra blackish-blue. 282. ballistabius. 



ff. Thorax much narrower in front, more gradually narrowed behind: 

 elytra paler blue. 283. fumans. 



aa. Medium sized or small species, not over 9.5 mm. 



g. Thorax wider than long, strongly constricted behind the middle. 

 h. Form slender; elytra smooth, feebly widened behind, their sides 

 almost parallel. 284. geacilis. 



hh, Form broader, the elytra gradually but distinctly widened from 

 base to apex. 



i. Elytra together subquadrate. distinctly costate. 



285. QUADBIPENNIS. 



ii. Elytra but faintly or obsoletely costate. 



j. Hind angles of thorax prominent; antennse and abdomen in 

 part or wholly dark. 286. cobdicollts. 



jj. Hind angles of thorax very slightly prominent; antennae and 

 abdomen wholly reddish-yellow. 287. cyanipennis. 



gg. Thorax as long or longer than wide, the base much less strongly con- 

 stricted. 



1c. Joints 3 and 4 of antenme almost black, joints 5 to apex more or 

 less fuscous ; abdomen wholly dark. 288. pulcheleus. 



Tck. Joints 3 and 4 of antenme not darker than those which follow. 

 I. Hind angles of thorax not at all prominent ; humeri indistinct. 

 m. Abdomen with the sides dark ; thorax broadly rounded on the 

 sides in front; larger, 7-9 mm. 289. peeplexus. 



mm. Abdomen wholly pale ; thorax more strongly rounded on the 

 sides in front; smaller, not over 6 mm, 290. minutus. 



