48 Journal New York Entomological Society. [ Vo1 - xxvii. 



many cases the swollen parts include in addition to the gall proper, a 

 portion of the surface of the stem below the petiole base and the entire 

 petiole and even the bases of the main leaf veins. The infested parts 

 of the plant are therefore quite irregular in outline. It was noted 

 that the galls did not occur below one and a half or two feet from 

 the ground, showing that the plant had made some growth before 

 oviposition had taken place. In some cases nothing was noted in 

 the galls, although this could not be due to the fact that oviposition 

 had been too recent. In most cases each gall inhabited contained 

 one larva, but two were not infrequent. In rare cases three were 

 found. Where two larvae occurred, it appeared from the injury that 

 oviposition had taken place on both sides of the petiole. In other 

 cases, where only a single larva was found, it seemed as if develop- 

 ment had not taken place in the unoccupied side of the gall. 



It was observed that the first adults emerged from galls nearest 

 the ground, that further up the steam, including the middle portion, 

 the galls contained pupae, and as the tip was approached, larva were 

 found. From this it would appear that the first eggs were deposited 

 in the lower leaf petioles. It might also be noted that there were 

 sometimes two groupings of galls, several near together, then no galls 

 for a short distance, then more further up the stem. 



The globular portion of the gall, which is at the base of the 

 petiole, contains the larvae and it appears that they bore in the thick- 

 ened bark tissue. In a few instances they continue down the stem 

 of the plant or out into the leaf petiole, but such injuries are infre- 

 quent. The number of galls on a single plant varied from one to 

 fifteen, the average being about eight or ten. The number of blank 

 galls on a stem varied from three to twelve. 



Egg. — 0.35 mm - m diameter, globular, translucent. 



Full Grown Larva. — Length 3 to 3.7 mm. Width of head 0.4 mm. 

 Characteristic curculio-form resting in normal curved position, 

 slightly flattened laterally, skin transversely wrinkled. Apodous. 

 Color yellowish white. Entire surface pilose. Body broadest through 

 middle abdominal segments tapering rather abruptly at anal end. 

 Anal extremity obtusely pointed. Thoracic portion tapering slightly 

 toward anterior end. Outer ventral portions of thoracic segments 

 distinctly rounded. Head smaller than thoracic segments and slightly 

 darker than bodv. Decided constriction between head and thorax. 



