1172 



FAMILY LIII. CIIRYSOMELmE. 



c. Head and legs in part piceous ; elytra black. ATRIPENNIS. 



cr. Ik-ad and legs pale; elytra green nr yellow. 2170. LONCJICORNIS. 



(id. Tibht' not carinate along the outer edge; elytra yellow with black 



stripes. -171. VITTATA. 



:.MC.<) (Cssi). lMAi:i:oTKA 11! i-i ,\< TATA Falir.. Syst. Ent.. 17i.~, 1t:i. 



oblong-oval, narrower in front, moderately convex. Pale greenish-yel- 

 low; head and prestermini black; elytra each with six black spots, as 

 shown in Fig. .".11; antenna- dark, with three basal joints pale, the second 

 and third together about as long as fourth; legs except base of femora 

 piceous. Thorax wider than long, surface smooth; disk convex with a 

 rather deep pit each side of middle. Elytra sparsely and very finely punc- 

 tate. Length 0-7.5 mm. (Fig. ."til.) 



Throughout tin- State; common. May 30-October 21. Occurs 

 on tin- foliage of cucumber, melon and allied plants, but is much 

 less injurious to them than is I), rilltita: found also on goldenrod, 

 corn and many plants. The larva- feed oil the roots of corn and 

 grasses. 



I). <ih-i{)<'>iiii:< Say, entirely black, or with thorax and abdomen 

 in part or wholly yellow, length 4-.") mm., is said to occur from 

 Massachusetts to Kansas and Dakota, but no specimens have as yet 

 been noted in Indiana. 



2170 (<>8SX). 



DIABROTICA LONtiicoitMs Say. Journ. Phil. A cad. Nat. Sci., 

 III. 1824, 4<;o; ibid. 11. -':!. 



Elongate-oblong, (ireenish or 

 greenish-yellow; antenna 1 , and 

 sometimes the head and thorax, 

 pale reddish-brown. Thorax near- 

 ly quadrate, sides curved in 

 front, slightly sinuate behind; 

 disk convex, smooth, with a rather 

 deep fovea each side. Antenna- 

 two-thirds the length of body. 

 Elytra distinctly wider behind 

 the middle, surface vaguely sub- 

 sulcate. rather coarsely and close- 

 ly punctate and with a raised line 

 from umbone two-thirds to apex. 

 Length 5-5.5 mm. (Fig. 512.) 



Throiighout the State, fre- 



Fii?. 512. < 10. (After Forbes.) (MM 111; more SO ill tile SOlltll- 



ei n counties. June 22-Oetoher 5. Most abundant in early autumn 

 on the silk and leaves of ripening corn and on the -flowers of wild 

 sunflower and goldenrod. 



