PERGANDE — NORTH AMERICAN PHYLLOXERIN^E. 211 



probable that the winged imago was the mother insect, developed 

 into the winged state, although we have heretofore considered 

 them as males." 



Phylloxera cary^-semen Walsh. 



PI. IX., figs, 50-51. 



Phylloxera carycs-semen Walsh. Proc. Ent. Soc. Phil., VI., p. 



283. 

 .Daktylosphara caryce-semen Walsh. Hirst Ann. Rep. Nox. Ins. 



of Ills., p. 231. 

 Daktylosphcera carycr-semen Shimer. Trans. Am. Knt. Soc, 2, 



P- 392. 

 Phylloxera catyce-semen Riley. Seventh Rep. Nox. and Ben. 



Ins. of Mo., p. 117. 

 Phylloxera caryce-semen Thomas. Eighth Rep. Nox. and Ben. 



Ins. of Ills., p. 163. 



This is evidently closely related to Ph. deplanata. The galls 

 of c.-semen are, however, much smaller, more strongly convex, 

 projecting above, and of much finer and harder texture. They 

 also greatly resemble smaller specimens of Ph. minima notwith- 

 standing the striking difference in the life-history of the two 

 species, viz.: the production of a winged, migratory form in Ph. 

 minima and the absence of such in Ph. c.-semen. 



Walsh (Proc. [Ent. Soc. Phil., 6, pp. 283 and 284) was led from 

 the apterous nature of the species to consider it Coccidous rather 

 than Aphidian, and in discussing the relative generic value of 

 winged and apterous gall-making species, remarks that "Carya 

 possesses at least two Coccidous galls, namely, caryce-vena Fitch, 

 which I find exclusively on the Shell-bark Hickory in August, 

 and which is described by Fitch as Aphidian, and doubtingly 

 referred to the genus Pemphigus, and caryx semen Walsh MS., a 

 gall of the size and shape of a cabbage seed, which I find in pro- 

 digious numbers on the leaflets of the Pig- nut Hickory in July." 

 And further on, in a foot note, he says : ' 'That these two galls are 

 Coccidous, not Aphidian, may be inferred from the fact that the 

 tarsi of the mother-lice are i -jointed, not 2- jointed. And besides, 



