OF THE STATE ENTOMOLOGIST. 



39 



The second or more oval form (Fig. 5, e) is destined to become 

 winged. Its .tubercles, when once acquired, are always conspicuous; 



[Fig. G ] 



Type Radicicola:— n, shows a hfalthy root; b, ouc on which the lice are working-, repre-sentiug the 

 knots and swellings caused bv tlieir jmuctures; c, a root that has been deserted by them, and where 

 the rootlets have CO ninienced 'to decay; el, d, d. show how the lice are found on the larger roots; e, 

 female pupa, dorsal view; /, same, ventral view; f/, winged female, dorsal view; h, same, ventral 

 view; J, magnified antenna of winged insect; ./, side view of the wingless female, laying eggs ou 

 roots; k, shows how the punctures of the lice cause the larger roots to rot. 



it is more active than the other, and its eyes increase rather than di- 

 minish in complexity with age. From the time it is one-third grown, 

 the little dusky wing-pads may be discovered, though less conspicu- 

 ous than in the pupa state, which is soon after assumed. Tlie pupae 

 (Fig. 6, e, f) are still more active, and, after feeding a short time, they 

 make their way to the light of day, crawl over the ground and over 

 the vines, and finally shed their last skin and assume the winged etate. 

 In this last molt the tubercled skin splits on the back, and is soon 

 worked off, the body in the winged insect having neither tubercles, 

 nor granulations. 



