10;iO FAMILY Lll. — CEKA-MBYCID.E. 



16 liavintr boon taken in the State. They are distinuuislied by the 

 finely granulated eyes, acutely triangular seutolluui, and by having 

 the front coxal cavities open l^ehind. 



KEY TO INDIANA GENERA OF TRACHYDERINI. 



(/. Tlidi-nx oicKiue, its sides with a spine or large tuliercle; size larger, 13- 

 25 mm. 

 ft. Body pubescent. XXIII. Tragidion. 



hi). Body not pubescent. XXIV. Purpuricenus. 



uu. Thorax shining, sides unarmed ; size much smaller, not over S mm. 



XXV. Batyle. 



XXIII. T\\V(iii)i()N Scrv. 1S;)4. (dr., "a young goat.") 



Largo or iHodiuiii-sizcd species having the scntolluiu small, 

 l)roadly triangidar: thoi-ax densely ])unctnred, both it and elytra 

 with black pul)escence concealing the punctures; antennjo filiform, 

 joints 5-11 cnrinate on outer side. 



1005 (((1127). TRA(iii)ioN coQi IS Linu.. Syst. Nat.. Ed. X. .'{OS. 



Elongate, robust, sulicylindrical. Black; elytra each with a large, 

 rounded orange spot near base; antenn.-e wholly black. Thorax as wide as 

 long, sides rounded, armed with a small spine behind middle. Elytra each 

 with three raised lines on disk. Length 10-25 mm. 



One specimen in each of the Webster and Field Museum collec- 

 tions labelled "Iiid. " Occurs in the "Atlantic and Southern States." 



XXIV. PuRPTTRiCENus Serv. 1883. (L., "purple.") 



Medium-sized, handsome black and scarlet or black and yellow 

 species, having the thorax with a small spine each side, the scutel- 

 lum broadly triangular and acute at tip. and the elytra not pubes- 

 cent. Two of the throe species occur in Indiana. 



1006 (6120). Purpuricenus humerai.is Fal>.. Ent. Syst.. Supp., 1708. 14.''.. 

 Elongate, robust, subeylindrical. Black, opaque, the legs alone feebly 



shining; elytra each with a large, triangular, scarlet humeral spot, defined 

 by au oblique line, running from scutellum to middle of outer margin. An- 

 tenna:' of male two-thirds longer than budy; of female about the length of 

 Ixxly. Thorax coarsely, densely and roughly inmctured. Elytra deeply and 

 ratlier coarsely i>unctured on bas;il half, more finely and densely toward the 

 apex. Lcnglli 14-lS mm. 



Taken ordy in Lake County in the wash-uji along the beach of 

 Lake ^Michigan Avhoro, at times, it is frequent. June 15-July 18. 

 Said to occur elsewhere on oalc and hickory. 



