516 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



oval shape, one-fortieth inch long, and of a dark straw-yellow 

 color. The eggs hatch just as the young leaves are expanding, 

 and upon them the young larva? feed greedily. The larvcc feed 

 on the upper surface of the leaf, eating out irregular holes through 

 the skin and into the soft tissue, and become full grown in three 

 or four weeks. The young larva) are a very dark brown, but 

 when grown they are one-third inch long and a dark yellowish- 

 brown, marked by regular rows of blackish tubercles each of 



C 



FIG. 372. The grapevine flea-beetle (Haltica chalybea 111.): a, adult with 

 hind leg at right further enlarged; 6, larva, much enlarged; c, beetles 

 and larva} on foliage natural size; d, beetle feeding on bud; e, diseased 

 beetles. (After Marlatt, U. S. Dept. Agr.) 



which bears a small hair. The head, anal and prothoracic 

 plates and legs are black. The full-grown larva drops to the 

 ground and an inch or two beneath the surface makes a small 

 cell in which it transforms to a white pupa, from which the adult 

 beetle emerges in one or two weeks. In New York there is but 

 a single generation, but more than one generation may occur in 

 the South. Upon emerging the beetles feed on the grape and 



