PERGANDE — NORTH AMERICAN PHYLLOXERIN^. 189 



8. Size medium ; slightly convex above and beneath, with a short 



nipple, having a round orifice, surrounded by a burr-like • 

 fringe of many filaments Ph. depressa (Shimer). 



9. Size medium ; quite flat above, with a dimpled depression, the 



opening beneath round and with a downy orifice. 



Ph. Joveata (Shimer). 



10. Size medium; convex and considerably elevated above and 



more prominent than beneath ; quite hard, smooth and shin- 

 ing. Orifice beneath round and closed. Resembling the galls 

 of Ph. c.-semen Ph. minima (Shimer). 



11. Minute ; red, more convex and more prominent above than 



beneath, with a dimpled depression, The nipple short and 

 surrounded by short, hairy bracts Ph. c.-semen Walsh. 



12. Size medium ; conical above and much more prominent than 



beneath; convex beneath, the nipple short, with an oval 

 orifice, fringed with short hairs Ph. c. -fallax Riley. 



[Proc. D. A. S., Vol. IX.] 2J [July 7, 1903.] 



