156 INSECT PESTS OF BERRIES AND GRAPES 



Life History. The eggs are probably laid in the spring. The 

 full-grown grub transforms to a pupa within the burrow, the adult 

 escaping by gnawing through the walls of its tunnel. The beetle 

 (Fig. 174) is dark brown, not quite one-half of an inch long, with a 

 head drawn under and below the thorax (Fig. 174). It may pass 

 the winter in the adult stage within the burrow, emerging in the 

 spring, or may issue from the twigs of the grape and hibernate in 

 a tunnel which it makes in fruit trees. 



Control. One should cut out and burn in spring all diseased 

 and dying twigs. By fall pruning of the grape, and burning of all 

 cuttings, affected vines may be relieved. 



FIG. 173. The grape-vine flea-beetle, different stages 



(U. S. Bu. Ent.) 



Hair lines 



The Rose Chafer (Macrodactylus subspinosus Fab.). This 

 small beetle appears at times in swarms and attacks the grapes 

 about blossoming time. It is awkward-appearing, yellowish and 

 brownish, and more or less hairy. The eggs are deposited in the 

 ground during spring and early summer. The larvae (Fig. 175) 

 look somewhat like small white grubs. They feed on grasses; live 

 over winter as larvae; turn into pupae in the spring, and soon 

 appear as adults. 



A Toxic Principle. This beetle is interesting in that for a long 

 time it was supposed that the death of fowls after eating them was 



