980 



FAMILY L . S C A B ABM1BM . 



border; last segment with the front margin elevated and a ridge pro- 

 longed backward at middle. Length 11.5-14.5 mm. (Fig. 375 and PI t 

 fig. 381.) 



Throughout the State; common. April 8 June 9. Readily 

 known by the small size, pale color and erect hairs of thorax, taken 

 in connection with the other characters mentioned in key. 



L. inept a Horn, oblong, subcylindrical, reddish-yellow, length 15 

 mm., was described from Ohio. L. guercus Knock, oblong, cylin- 

 drical, reddish-yellow, head darker, elytra paler, length 14.5-16 

 mm., occurs from the Middle States southward to Georgia. 



Subfamily III. PLEUROSTICTL 



The members of this subfamily are mainly distinguished by the 

 position of the abdominal spiracles, the second pair being located in 

 the membrane connecting the dorsal and ventral segments, the third 

 on the outer limit of the membrane and the others in the upper or 

 dorsal portion of the ventral segments. The last two pairs diverge 

 strongly and are usually visible on the sides of the abdomen below 

 the elytra, which do not cover the last dorsal segment or pygidium. 

 They are more closely and heavily built insects than the Melolonthi- 

 nse, and like them are. for the most part, vegetable feeders or "leaf 

 chafers.*' The general color is lighter and often variegated; the 

 antenna? 9- or 10-jointed, with the club three-jointed and rarely 

 elongated in the males, and the ligula is always horn-like and firmly 

 united with the mentum. For convenience the subfamily is sub- 

 divided into three tribes, all of which are represented in Indiana. 



KEY TO TKIBES OF PLEUKOSTICTI. 



a. Claws of the tarsi unequal in size, the inner one usually much more 

 slender than the outer. Tribe I. Rutelixi. p. 980. 



a a. Claws of the tarsi equal in size. 



1). Front coxie transverse, not prominent: body above convex (except 

 in Phileurus) . Tribe II. Dyxastixi. p. 98S. 



1)1). Front cox« conical, prominent: body above somewhat flattened or 

 nearly level. Tribe III. Cetoniini. p. 995. 



Tribe I. RUTELINI. 



Oblong, convex, usually robust species, having the labrum short, 

 horizontal and sinuate; mentum quadrate; scutellum usually 

 rounded behind; tarsi short, with cylindrical joints; side pieces of 

 metathorax narrow with the epimera visible. They live for the 

 most part on the leaves of trees and vines and some of them are very 

 injurious, especially to the foliage of the grape. 



