CHRYSOMELID2E . 



505 



Fi s- 498 - 



live on the upper surface of the leaves and devour the cuticle 



and parenchyma above, leaving the lower cuticle untouched. 



It is of a dirty yellowish white color, with black tubercles 



bearing white bristles. Length one-fourth of an inch." (Har- 



ris Correspondence, p. 267.) 



We have found Galeruca marginella Kirby (Fig. 498 ; a, 



larva ; 5, pupa) in all its stages of growth on Myrica gale, 



during the middle of August, 



in Northern Maine. The 



larva is shining black, coria- 



ceous above, and the body 



is elongated, flattened, with 



a small orbicular black head. 



The upper side of the body 



is hard, from the close prox- 



imity of the black flattened 



tubercles. Beneath, whitish ; on the side is a row of small 



black brown tubercles, and along the middle of the body is a 

 row f transversely linear brown tu- 

 bercles, on each side of which is a 

 minute dot-like tubercle. It is not 

 hairy, and measures .25 of an inch in 

 length. When about to transform it 

 fastens itself by its tail to the surface 

 of a leaf. The pupa is brown-black. 

 The beetle is umber brown, testaceous 



on the edges of the elytra, the legs being also testaceous, 



while the prothorax is pale, with three dark brown spots, 



of which the central one is T-shaped. 

 The Striped Squash beetle, Diabrotica 



mttata Fabr. (Fig. 499, a, larva ; &, pupa , ., 



seen from underneath; Fig. 500, adult) ap- / < 



pears on squash vines as soon a's they are 



up, and at once devours them unless their attacks are pre- 



vented. Covering the vines with cotton or a box covered with 



muslin or millinet is the only sure remedy, while on a large 



scale powdered charcoal, or lime is used, to be sprinkled on the 



leaves. Mr. Gregory, says the "American Agriculturist," re- 



lies upon plaster, or oyster- shell lime, which may be shaken 



Fig. 499. 



soi. 



Fig. 500. 



