204 DAVENPORT ACADEMY OF SCIENCES. 



solid and rather stout at the base. The galls are almost per- 

 fectly white on the inside and semi-transparent. 



Stem-mother. — Length about o.8"""-. Shape broadly oval, 

 the last two or three segments quite slender. Color pale dull 

 yellowish, with a faintly dusky tinge. Head, antennae and legs 

 dusky. Eyes brown. Surface of body apparently without 

 granulation. There are two small blackish median punctures on 

 the head, between the eyes ; six stiff hairs along its front edge, a 

 transverse row of four such hairs back of the anterior margin, 

 one each side of the black punctures, and one close to the inner 

 edge of the eyes. Two similar hairs, arising from lateral tuber- 

 cles of each of the thoracic segments and one each side, also on 

 tubercles, on the abdominal segments. The dorsum is marked 

 with six rows of pale dusk}- tubercles, each bearing a hair, with 

 two deep subdorsal punctures each side of the prothorax, and 

 two similar puncture's each side in the following three sutures. 

 Antennae rather short; the first joint very much swollen and 

 almost globular. The second slightly longer than wide, rounded 

 and somewhat stoutest at apex. The third not much longer 

 than the two basal joints together, of equal diameter througout 

 and quite scaly. Legs rather longer than usual, the tarsi very 

 stout, conical, with the knobs of the terminal hairs larger than 

 usual. 



The stem-mother of this species is more active than that of an},- 

 of the other observed species. 



Eggs. — Pure white, ovoid, highly polished and with a faint 

 trace of hexagonal reticulations. 



Larva and youngest pupae white, the older ones pale orange ; 

 mesothorax and wing-cases white. Eyes and ocelli red. 

 Antennae and legs white. Surface of body densely and quite 

 coarsely granulate. 



Migratory Femai^e.— Length of body about 1.2™"'-. Expanse 

 of wings 2.8-3"""-. Color orange, the prothorax darkest. Head 

 blackish, its anterior margin darker. Eyes brown, ocelli clear, 

 bordered with black at inner margin. Antennae and legs pale 

 dusky. Mesothorax, scutellum and sternal plate black. The 

 prothorax is marked at its anterior margin with a median, some- 

 what elongated, triangular, pale dusky spot and a short trans- 



