THE LEAF BEETLES. 



1231 



Throughout the State ; common. February 8-December 22. Hi- 

 bernates beneath mullein leaves and rubbish. Occurs on sweet po- 

 tatoes and wild members of the Convolvulus family, often doing 

 much injury to the former. The leaves only of young plants should 

 be dipped in a strong solution of arsenate of lead. 



C. thoracica 111., length 7 mm., is known from Illinois. 

 *22S0 (7100). Cassida pallidula Boh., Mon. Cass., II, 1858, 457. 



Oblong-ovate, sides nearly parallel. Uniform dull green or greenish- 

 yellow ; antennae with last three joints piceous. Thorax twice as wide as 

 long, the angles all broadly rounded; margin very broad, flat and translu- 

 cent. Elytra with humeral angles prominent, margins broadly flattened, 

 punctures very coarse and close-set; intervals narrow. Length 5-5.5 mm.' 



Vigo and Perry counties; scarce. February 11-December 29. 

 Riley records it as attacking egg-plant, the horse-nettle and other 

 species of Solanacew* 



LXXIX. Coptocycla Chev. 1834. (G-r., "cut + circle. ") 



The members of this genus are known from those of Cassida by 

 their longer antennae and more depressed form, with broader and 

 more flattened margins of thorax and elytra. 



KEY TO INDIANA SPECIES OF COPTOCYCLA. 



a. Elytra without black spots or dark markings. 



&, Elytra wholly golden yellow (dull reddish-yellow after death), not 

 alutaceous. 2281. bicolor. 



bb. Elytra brownish-red, very finely granulate or alutaceous. 



2282. PURPURA TA. 



aa. Elytra with black spots or marks, sometimes wholly black, except the 

 margins. 



c. Disk of elytra with numerous tubercles or elevations, the margins 

 pale at middle and apex. 2283. clavata. 



cg. Disk of elytra without distinct tubercles, the margins pale from near 

 humeral angles to apex. 

 (I. Dark discal space of elytra broken by numerous yellow or pale 

 s P° ts - 2284. SIGNIFERA. 



(Id. Dark discal space without spots, black, shining. 2285. plicata. 



2281 (7102). Coptocycla bicolor Fabr., Syst. Eleut, I, 1801, 369. 



Broadly oval, subdepressed. Above brilliant brassy or 

 greenish-golden in life ; dull reddish-yellow after death ; un- 

 der surface and last four joints of antenna! black. Margins 

 of thorax and elytra broadly expanded, very thin and trans- 

 lucent. Elytra each with a small, rounded, depressed space 

 on disk, a large oblong one (often interrupted at middle) 

 near margin, and with about ten rows of small, feebly im- Fig. 551. 

 pressed punctures. Length 5.5-6 mm. (Fig. 551.) 



*Amer. Nat. XVI, 1882, 679. 

 [78—23402] 



