202 



A A' ECOXOMIC EXTOMOLOGY. 



will prove effective, as they do not fly much after nine o'clock, 

 except on unusually warm and sultry nights. 



Frequently we find on grape and Virginia-creeper, during 

 midsummer, a small chafer with clay-yellow, rather shining, and 

 striated wing-covers, feeding upon the leaves. This is the 

 Anomala iucicola, which varies also to a shining black. It is 

 occasionally numerous enough to cause notable injury, but 



Fig. 191. Fig. 192. 



Anomala Iucicola.— a, b, larva; c, pupa in Goldsmith beetle, 



lar\-al skin ; d, e,f, adult beetles. Cotalpa lajiigera. 



yields readily to any of the arsenites. The larvae live in light 

 soil, feed upon the roots of grasses, and pupate in late fall, the 

 adult forming soon after and remaining Avithin the cast larval 

 skin until ready to emerge in early summer. 



Also found during the day on grape foliage, or flying toward 

 it during early evening, is a large, shining, tan-yellow chafer, 

 with eight black spots, two on the thorax and six on the wing- 

 covers. This is the Pelidnota punctata, or ' ' spotted vine-chafer, ' ' 

 which feeds upon the leaves, but rarely does noticeable injury. 

 The lar^-se feed upon decaying roots and stumps, and I have 

 taken both larva and pupa out of a rotten cedar trunk. 



Swamp-willow in the East is the food of Cotalpa lanige?^a, a 

 beetle very similar in size and shape to the preceding, but of a 

 beautiful shining, lemon yellow, the head glittering with a golden 

 sheen, hence known as the "goldsmith beetle." Beneath it is 

 of a burnished copper color, densely clothed with white woolly 

 hair. It is not injurious, and mentioned here only because of its 

 beauty. Some of its allies in the Southwest and in the tropics 

 are of the most brilliant golden and silvery tints. 



