268 DAVENPORT ACADEMY OF SCIENCES. 



infests not alone the stems and twigs of willows bttt occasion- 

 ally also the under side of the leaves. Those on the wood are 

 always stationed in some crack, under the delicate loose bark, or 

 are pushed in between the leaf -buds and the twig. All are com- 

 pletely covered with a white wooly secretion which hides the 

 insect from view and recalls in appearance certain coccids of 

 the genera Pseudococcus and Dactylopius. 



PuPiFEROUs FEMALE. — I^ength 0.6-0.9™°-. Shape of younger, 

 most vigorous specimens, elongate-pyriform, and that of the old 

 or almost empty ones quite circular. Color yellow, the older 

 ones brownish-yellow, with head and thorax darkest. Antennae 

 and legs faintly dusky. Eyes brown or blackish. Rostrum very 

 long, reaching almost to the end of the body. Antennae rather 

 slender ; joint 2 longer and more slender than the first, both stout- 

 est near the apex ; joint 3 longer than the two basal ones com- 

 bined, of uniform diameter or faintly stoutest near base and 

 slightly curved ; thumb extremely minute and placed close to 

 apex ; annulation alinost imperceptible, the tip apparently pro- 

 vided with two minute hairs. Surface of the body covered quite 

 densely with minute and somewhat pointed granules. In addi- 

 tion to the general granulation there appear to be six rows of 

 secretary spots or warts on the abdomen, less numerous on the 

 head and thoracic segments, all of which are detected with much 

 difficulty. Each of these warts is again divided into four to six 

 groups, which are composed of three to four still smaller divi- 

 sions or pores. Four short hairs fringe the front of the head, 

 two similar ones each side the thoracic and one each side of the 

 abdominal segments. 



Sexual eggs. — I^ength of egg producing the female about 

 0.2™™-; that producing the male somewhat smaller, the former 

 regularly ovoid, the latter somewhat pointed posteriorly. Color 

 yellow, highly polished, and without sculpturing. 



Male and Female. — I^ength of female scarcely 0.3™™-, the male 

 being about one-fourth less. Color of both pale yellow, though 

 the male is slightly darkest. Antennae and legs faintly dusky, 

 darkest in the male. Eyes reddish or brown. Antennae extremely 

 small and very similar in both sexes ; joint i stoutest and largest ; 

 joint 2 very short, sometimes. scarcely noticeable ; joint 3 scarcely 



