EBERHART8 OUTLINES OF 



undistinguishable, in all essential characters, from those 

 hatched in the galls; but in due time they shed the smooth 

 larval skin, and acquire raised warts or tubercles which at 

 once distinguish them from gallicola. In the development 

 from this point the two forms are separable with sufficient 

 ease: one of a more dingy greenish yellow, with more 

 swollen fore- body, and more tapering abdomen; the other 

 of a brighter yellow, with the lateral outline more perfectly 

 oval, and with the abdomen more truncated at tip. The 

 first or mother form is the analogue of gallicola, as it never 

 acquires wings, and is occupied, from adolescence till death, 



Fig. 66. Somewhat Mature Larva of the Root-inhabiting Type. (Very highly 

 magnified.) 



with the laying of eggs, which are less numerous and some- 

 what larger than those found in the galls. We have counted 

 in the spring as many as two hundred and sixty-five eggs in 

 a cluster, and all evidently from one mother, who was yet 

 very plump, and still occupied in laying. As a rule, how- 

 ever, they are less numerous. With pregnancy this form 

 becomes quite tumid and more less pyriform, and is content 

 to remain with scarcely any motion in the more secluded 

 parts of the roots, such as creases, sutures, and depressions, 

 which the knots afford. The skin is distinctly shagreened 

 as in Gallicola. The warts, though usually quite visible 



