JOURNAL OF ENTOMOLOGY AND ZOOLOGY 199 



with dusky tips, 0.06 mm. long. The wings have a long narrow 

 clouded area extending the full length along the front margins of 

 both pairs as shown in the drawing. These markings are the most 

 noticeable characteristic of the species. The venation is also shown 

 in the drawing. The length of primary wings is about 2.6 mm. 

 and the length of the secondary wings about 1.7 mm. The cauda 

 is the color of the body or slightly dusky, distinctly knobbed and 

 supporting several long hairs. The anal plate is distinctly bilobed 

 and also hairy (Fig. 8). 



Nymphs 



The nymphs of the winged viviparous females are very trans- 

 parent, pale or bright yellow when very young. They are covered 

 with very noticeably long, capitate, glandular hairs which persist 

 until the last moult. The fully-developed nymph is bright-yellow 

 with dark markings on the antennal articles and dark tubercles on 

 the dorsum as shown in Fig. 9. The tubercles are located at the 

 bases of the glandular hairs in somewhat definite rows — at least 

 four rows of large tubercles are noticeable and two rows of smaller 

 ones. Sometimes there is evidence of two more rows of small 

 spines, making 4 rows of large tubercles and 4 rows of small tuber- 

 cles in all. The eyes are red. The legs are pale-yellow with the 

 tarsi of all and the bases and tips of the hind femora dusky. In 

 some individuals the tips of all of the femora appear dusky. 



Food Plants 

 The food plants of this species seem to be limited to various kinds 

 of oak trees. In the eastern states it has been taken on Qtiercus 

 rubra by MonelP and Qistlund", on Q. coccinea by Hunter^ on Q. 

 macrocarpa by Thomas* and on white oak (Q. alba ?) by Morri- 

 son^ It has only been taken on the coast live oak (O. agrifolia) in 

 California. 



1 Monell, J. T., Bui. U. S. Geol. Suiv. V, p. 29, 1879. 

 2CEstlund, O. W., Aphid. Minn., p. 43, 1887. 

 3 Hunter, W. D., Bui. 60, la. Agrcl. Exp. Sta., p. 89, 1904. 

 * Davis, J. J., Bull. 111. State Lab. Nat. Hist. HI, p. 114, 1913. 

 5 Morrison, H., 5th Rept. Ent. Ind., p. 216, 1912. 



