]226 FAMILY IJII. CHRVSOMELIU^E. 



LXXV. rriALEiTs Thniih. IbT).'). (Gr.. "difficult.") 



The moinbcrs of this gcinis i-esenihle those of the preceding in 

 form, hut differ 1)\' having all the joints of the antenntp distinct, the 

 elytra with tlie alternate intervals nsnally costatc and the middle 

 tihia^ straight. Six species have been taken in the State, while an- 

 other prohahly occnrs. They were listed l)y Henshaw under Odon- 

 fota. 



KEY TO INDIANA SPECIES OF CHAI.EPUS. 



(I. Elytra witli tfii rows of imuctnres. 



1). Elytra not costate; f(u-iii uarmw. ]iiii-alU'l : thorax red, elytra blue. 



t'OLLARIS. 



hi). Elytra costate. 



r. Elytra with three entire costfe only. 



(1. Elytra black, or at most with reddish hnraeri. 



c. Body beneath black; thorax red with discal dark space; hu- 

 meri of elytra red. 2l'G0. scapularis. 

 cc. liody beneath red; thorax wholly red; elytra wholly black. 



2270. BICOLOK. 



(hi. Elytra mostly red. 



/. Elytra with a very narrow Idack sntnral line, which does not 

 reach apex. 2271. hornii. 



ff. Elytra with a black sntnral stripe which liroadens gradually 

 from base to apex. 2272. dorsaus. 



cc. Elytra with three entire costse. and a fourth represented at base 

 and aiiex between the second and tliird; color reddish-yellow, 

 with darker spaces on elytra ; len,iith 0(15 mm. 2273. ri^bra. 

 (III. Elytra with eight rows of punctures; color reddish with dark mark- 

 ings; length 3.5-4 mm. 2274. nervosa. 



C. conari.^- Say, length 5.5-6 mm., is known from Colorado and 



Illinois. 



22G9 (7075). Chalepus scapularis Oliv., Ent., VI, 1808, 766. 



Wedge-shaped, robust. Black, feebly shining ; a broad stripe each side 

 of thorax, humeral angles of elytra, and sometimes the base of femora, dull 

 red. Thorax widest at base, sides subangulate at middle; disk depressed 

 near base, coarsely and doeiily ]iunctured. Elytra each with three costa\ 

 the second and third separated by four rows of lunictures; aitex serrulate. 

 Length 5..5-7 nun. 



Steuben, Starke, ^lai-shall aud Vigo coinities ; scarce. June 15- 

 September IS. Occurs on the hog-peanut, Falcata conio.sa L. 



2270 (7077). CiiArEPrs incor.oR Oliv., Eiicyc. Method., VII, 1702, 06. 



Elongate. n(>:ir]y i)arallel, r.lack. sulioiiacpie ; thorax, scutellum, under 

 surface, and often tln^ base of femora. Itrighf red. Vertex snlcate. Thorax 

 very little wider at base, sides obtusely juigul.ale; disk very coarsely, dense- 

 ly and deeply punctured Elytra with sides and apex serrulate; disk punc- 

 tured and costate as in scapularis, except that the four rows of punctures 



