1020 



FAMILY LII. — CERAMBYClDiE. 



Division II. CERAMBYCOIDES. 



This division, distinguished only by the characters given in the 

 key, is divided into 12 tribes, seven of which are represented in 

 Indiana. 



KEY TO INDIANA TRIBES OF CERAMBYCOIDES. 



a. Eyes coarsely granulated. 



b. Front coxal cavities open behind. Tribe I. Cerambycini, p. 1020. 

 bl). Front coxal cavities angulated, closed behind ; length less than 7 mm. 



Tribe II. Obettni, p. 1027. 



aa. Eyes finely granulated. 



c. Elytra either only about as loug as thorax or elongated and awl- 



shaped. Tribe III. Stenoptini. p. 1028. 



cc. Elytra normal, not abbreviated nor awl-shaped. 



d. Scutellmn either rounded behind or broadly triangular. 



e. Tibial spurs small ; legs long and slender ; thighs very slender at 

 base, strongly and suddenly club-shaped at apex; front coxal 

 cavities open behind. Tribe IV. Rhopalophorini. p. 1029. 

 ee. Tibial spurs large; thorax never with tubercles or spines. 



f. Tibiae strongly carinated ; form slender ; punctuation sparse 

 and coarse. Tribe VI. Stenosphenini, p. 1031. 



//. Tibiae not carinated ; form usually stouter ; punctuation fine. 



Tribe VII. Clytini, p. 1032. 

 dd. Scutellum acutely triangular; front coxal cavities open behind. 



Tribe V. Trachyderini, p. 1029. 



Tribe I. CERAMBYCINI. 



This tribe embraces all genera of the subfamily having the eyes 

 strongly granulated ; front coxal cavities open ; abdomen normal in 

 .both sexes ; antennae with the second joint small. The scutellum is 

 rounded behind, except in Chion; antennae long without distinctive 

 sensitive spaces; mandibles acute at tip; elytra not abbreviated; 

 eyes not divided, though always deeply emarginate. About 25 

 genera belong to the tribe, seven of which are known to be repre- 

 sented in Indiana, while four others may occur. 



KEY TO INDIANA GENERA OF CERAMBYCINI. 



a. Body with six cross-bands of yellow pubescence; ligula more or less 

 horn-like ; palpi unequal, dilated. XI. Dryobius. 



aa. Body with not more than one yellow cross-band. 

 1). Ligula more or less horn-like. 



c. Epimera of mesosternum large ; front trochantins not visible : 



length 16 mm. Achryson. 



cc. Epimera of mesosternum small ; length 6-S mm. Gracilia. 

 1)1). Ligula membranous. 



d. Front coxal cavities angulated; antennae, thighs and elytra not 



spinose ; length 14.5 mm. Stromatium. 

 dd. Front coxal cavities rounded. 



