44 NEW YORK STATE MUSEUM 



Galls smaller though similar to P. p i c t a, opening on upper surface, more 

 convex and often with a slight depression above, no opening above before 

 maturity, a minute, closed nipple beneath, diameter 3 to 6 mm, height 2 to 3 

 mm. Perg. '04, p. 189 



Aphid. Phylloxera intermedia Perg. 

 Gall convex, opening on the under surface, the walls papery, more elevated 

 above than beneath, with a reddish or crimson fovea or dimple above, varying 

 in depth; the orifice beneath small and surrounded by a fringe of short, flar- 

 ing bracts, diameter 3 to 5 mm, height i to 3 mm. Perg. '04, p. 200 



Aphid. Hickory button gall, Phylloxera foveola Perg. 



Gall concave above, with orifice on under surface, the walls papery, convex 



beneath, the nipple formed of rather long, slender filaments, the depression 



above as well as the surface beneath, including the filaments, with long, white 



hairs, diameter 3 to 6 mm, height 2 to 3 mm. Perg. '04, p. 203 



Aphid. Phylloxera pilosula Perg. 



Gall small, the walls papery, slightly convex above, more prominent beneath, 



usually with a small, shallow depression toward one side, above, nipple short, 



without bracts, the orifice beneath, more or less oval and fringed with short 



pubescence, diameter 1.5 mm. Perg. '04, p. 205 



^ Aphid. Phylloxera deplanata Perg. 



Gall medium, the walls papery, slightly convex above and beneath with a short 

 nipple, having a rounded orifice surrounded by a burlike fringe of many 

 filaments, diameter 3.8 to 6.2 min, height 3 mm. Perg. '04, p. 208 



Aphid. Phylloxera depressa Shim. 

 Gall medium, opening on the under surface, walls papery, quite flat, above, 

 with a dimpled depression, the opening beneath round and with a downy 

 orifice, diameter 1.5 mm, height 3 to 4 mm. Perg. '04, p. 209 



Aphid. Phylloxera foveata Shim. 



Gall medium, walls papery, convex and considerably elevated above and more 



prominent than beneath, rather hard, smooth and shining, the orifice beneath 



round and closed; resembles the gall of P. caryaesemen, diameter 



.6 to 2 mm. Perg. '04, p. 210 



Aphid. Phylloxera minima Shim. 



Gall minute, walls papery, red, more convex and more prominent above than 



beneath, with a dimpled depression, the nipple short and the orifice beneath 



surrounded by short, hairy bracts, diameter .3 to 2 mm, height .2 to 5 mm. 



PI. 14, fig. 8. Perg. '04, p. 211 



Aphid. Phylloxera caryaesemen Walsh 

 Gall medium, walls papery, conical above and much more prominent than the 

 convex under surface, the nipple short with the oval orifice beneath, fringe 

 with short hairs, diameter 1.5 mm. PI. 14, fig. 5. Perg. '04, p. 214 



Aphid. Phylloxera caryaefallax Ril. 

 Gall large, fleshy, convex on both surfaces, more prominent on the lower, the 

 circumference above buttonlike, with a more or less sharply defined edge 

 either above or sunken beneath the surface of the leaf, nipple short, surrounded 

 by short bracts, the orifice beneath round, diameter 3 to 11 mm, height 1.6 

 to 3.4 mm. PI. 14, fig. 7. Perg. '04, p. 217 



Aphid. Phylloxera rimosalis Perg. 

 Gall subglobose, walls fleshy, about equally prominent above and beneath, 



