198 DAVENPORT ACADEMY OF SCIENCES. 



It occurs on Hicoria tomentosa and matures by the end of May 

 or early June. • 



To separate this gall from many of the forms of Ph. interm.edia 

 is often very difficult, especially after they have burst open, when 

 they resemble each other quite closely, though a comparison of 

 tlje winged forms of both will show them to be unmistakably 

 good species. 



Stem-mother. — I^ength o. s"""- . Almost globular, pale-yellow, 

 the oldest ones darker and with a faintly dusky tinge. I^egs and 

 antennae pale-dusky and rather stout. Eyes purplish-black. 

 Antennae short and rather stout ; the third joint somewhat 

 clavate, slightly curved, quite pointed beyond the minute thumb 

 and but sparsely annulate. The surface of the whole body is 

 closely covered with large, round tubercles. 



Pupa. — Varying from nearly white to various shades of yellow. 

 Antennae and legs faintly dusky; the wingpads whitish with a 

 dusky external margin. Eyes and ocellar spots reddish. The 

 whole surface of the body is distinctly and densely granulate. 

 Antennae slender; the third joint of about uniform thickness and 

 with scarcely a trace of annulation. 



Migratory Female. — lycngth of body 0.8-1.3"""-. Expanse 

 of wings 2-2. 6"""'. Color pale orange. Head, mesothorax, 

 scutellum and sternal plate varying from dusky, to almost black. 

 Antennae and legs faintly dusky. Ocelli clear, margined at inner 

 side with black. Form rather slender, the abdomen often 

 considerably elongated. Head and prothorax finely rugose, the 

 sculpturing much finer than in c. -septum. Abdomen indistinctly 

 granulate. Antennae slender and very similar in shape to those' 

 of c. -septum ; joint 2 somewhat longer than the first, thinnest at 

 base, rounded at apex and divided by 3-4 apparently scaly 

 annulations ; joint 3 of almost uniform thickness, slightly con- 

 stricted just above the lower sensorial membrane, its basal 

 section being about the length of joint 2, and sharply and 

 coarsely annulate; the upper sensorial membrane attains almost 

 one-half the length of the joint, whereas the lower one is incon- 

 spicuous, small and round. The whole appearance of this joint, 

 in the main, is very similar to that of c.-scptwn. Wings delicate 

 and pale dusky, the veins slightly darker though often almost 



