3i6 



ECONOMIC ENTOMOLOGY 



Adult. — Bluish-black, 3-^ inch long. Natural hosts are smartweed 

 and dock. 



Eggs. — ^Laid in autumn. 



Pale-striped Flea Beetle (Systena blanda Mels.).^ — This Flea beetle 

 attacks a large number of vegetable crops in June- July. 



Grapevine Flea Beetle {Haltica chalyhea 111.).- — (Consult Bull. 157, 

 Cornell Ag. Exp. Stn., 1898.) The early adults injure the buds of grapes 



Fig. 206. — The grapevine flea beetle {Haltica chalybea): a, adult beetle; b, 

 larva or grub; c, beetles and larvae on foliage — natural size; d, beetle feeding on 

 bud; e, diseased beetles. {After Marlatt, U. S. Bur. Ent.) 



and Virginia creeper while the larvae and late adults riddle the leaves. 

 A native insect (Fig. 206). 



Adult. — A polished steel-blue, or sometimes purplish, flea beetle, \q 

 inch long; antennae and legs brownish black or piceous; thorax distinctly 

 wider at base. Hibernates. 



Eggs. — Orange-colored, long-oval; laid in crevices of the bark near 

 base of buds, or on the leaves. One-thirtieth inch long. 



Larva. — ^Lightish-brown, jiQ inch long; head and thoracic shield 

 black; 6-8 shining black dots on each segment, a brown hair on each dot; 



