236b DAVENPORT ACADEMY OF SCIENCES. 



is minute, near the apex of the joint, and bordered at one side by 

 about four circular pores. 



The wings are rather long and broad and of a brownish 

 shade, with the veins and stigma still darker or dusky; both 

 the branch of the discoidal and the stigmal vein are obliterated 

 at base. 



The antennal characters of this species are more remark- 

 able'^ than those thus far observed in any of the other Phyllox- 

 erini. 



Sexual generation. — Both sexes are yellow, though the 

 male is somewhat paler and smaller. The"'eyes are. reddish- 

 brown to black ;'_the head, antennae, legs and_ pronotum dusky, 

 the rest of_the thorax and interrupted band across the abdominal 

 segments still darker. 



The sexualfemale is about 0.4™'"- in length and slightly over 

 o. i'"""in diameter about the middle. It is elongated and con- 

 tains but one egg. The third antennal joint is clavate and quite 

 sharply serrate ; the sensorial nipple is small and placed near the 

 apex, bordered at one side by one to three circular pores. The 

 body is provided with rows of small hairs. 



The male is about one-third smaller and more tapering poster- 

 iorly and the., genital armature elongate conical. The^antennze 

 are identical with those of the female, except that there is a 

 rather long bristle about the terminal third of joint three. The 

 hairs of the body are also much longer and slightly dilated or 

 capitate at the apex. 



Phylloxera globosum Shimer. 



PI. XIII., figs. 91, 92;'?!. XIII.,;;figs. 93, 94, var. coniferiiiit. 



Dactylosphcera globosum Shimer. Proc. Acad. Nat. Sci. Phila. 

 Vol. 19, p. 2. 



Dadylosphara globosum Shimer. Trans. Am. Ent. Soc, 2, p. 

 392. 



