Pomona College Journal of Entomology 735 



Hosts 

 Feeds on the leaves of Populus trem- Feeds on the hark of Willow (Salix 



uloides. Iiirviirata Bchh.), and is a subterranean 



form, or nearly so. 



Williams' description of the speeifie characters including the Iciigtiis of the 

 antennal articles is deficient and a more extensive comparison is impossible. True 

 that in many ways the descrij)tions agree very well, but from the differences given 

 above and especially its habits, it seems to be a new species. 



FULLAWAYA n. sen. 

 Type F. saliciradicis n. sp. 



Body — Robust forms, the body of the winged female narrow at head, but 

 mesothorax, metathorax and abdomen nearly the same width. The body of the 

 apterous female widest at the middle and tapering to a point posteriorly and to a 

 rather broad front anteriorly. Covered with short fine hair and may or may not 

 be slightly pruinose. Large species. 



Head — Considerably narrower than the thorax, slightly pointed or straight 

 across the front, with very indistinct frontal tubercles, especi.illy so in the apter- 

 ous forms. Covered with fine hairs. Nearly quadrangular in shape with the 

 antennae arising from the sides near the front. 



Eyes — Large, with terete tubercles on the back margin. 



Antennae — In the winged form a little over half the length of the body, not 

 half so long as the body in the apterous form ; not reaching beyond the third 

 abdominal segment. Arising from the front sides of the head on very indistinct 

 tubercles, or no tubercles at all. Covered witli long hairs, each on a large tubercle. 

 Slightly imbricated and rough because of the hair tubercles. Article I usually 

 shorter than II, never longer than II, though they may be coequal, I always 

 wider. III much longer than either IV or V, though not nearly so long as the 

 two together, not so long as VI, but longer than the spur, IV and V nearly sub- 

 equal, the former usually a little shorter; VI the longest article, the spur nearly 

 twice as long as the base and nearly coequal with articles IV and V, but usually 

 a little shorter that either. The transition from the base of VI to the spur is not 

 so great as in most aphids, the spur is nearly as wide as the base. 



Rostrum — Reaching nearly to the tip of the abdomen, to the tip or even 

 beyond the tip (in the winged and young forms the rostrum may project beyond 

 the tip of the abdomen) , but in tlie robust apterous forms it does not quite reach 

 to the tip. Hairy along margins of the last joint. 



Prothorax — Wider than the head, nearly rectangular in shape, with large, 

 semi-globular, lateral tubercles near tlie middle. 



Abdomen — With lateral smaller semi-globular and rather pointed tubercles 

 on each side. Practically all semi-globular in the apterous forms and two semi- 

 globular ones near the middle on each side of the winged forms, the remainder 

 rather pointed. Smooth, covered with fine hair, shiny or pruinose. 



Cornicles — Entirely wanting. 



