212 



GENUINE SNOUT-BEETLES. 



black spots at the base of the wing-covers (Fig. 226). The ash- 

 gray color is produced by the numerous scales of that color, which 

 uniformly cover the beetle, and the black spots, sometimes very 

 plainly marked but in other cases entirely absent, seem to be pro- 

 duced by the removal of such scales. Western species are mostly 

 unicolored, eastern possess three larger or smaller spots. This 

 beetle deposits eggs in the stems and larger branches of the po- 

 tato, Jimpson weed, and perhaps other Solanaceae; the resulting 

 white larva? feed there until midsummer, when, at the time the 



Fig. 226.— Trichobaris 3. tiotata, Say. After Smith. 



plant matures, they change to pupa? and beetles, the latter remain- 

 ing in the burrows until spring. Knowing their life-history it is 

 of course very simple to suggest the proper remedy, i. e., to burn 

 the dead potato-vines as soon as the crop is harvested. 



Many other and similar snout-beetles are found, which, as a 

 rather general rule, are polished black, with numerous fine stria? 

 upon their wing-covers. 



THE GRAPE-VINE GALL-BEETLE. 



{Ampeloglyhtcr Scsostris Lee). 



This, as well as A. (iter, produces curious gall-like swellings 

 on the stems of the grape-vine, which have received the name 

 Vitis vulnus Ril. Such galls are not uncommon on the wild and 



