KEY TO AMERICAN INSECT GALLS 



43 



Greenish, hairy, length 5 mm, beaked, on C. alba 



Caryomyia sp., ^2526 



Conical leaf galls, without a distinct orifice 



Base subglobular, a long, slender apical process, greenish to reddish brown, 

 length 3 to 4 mm, occurs in groups on midrib of bitternut hickory. PI. 6, 

 fig. 2, 3. Osten Sacken '62, p. 192 



Itonid. Hickory seed gall, Caryomyia caryaecola O. S.^ 

 Conical, nearly symmetrical, thin-walled, small, green or red tinted, length 2 

 mm. Felt 'oge, p. 293 



Itonid. Conical hickory gall, Caryomyia sanguinolenta O. S. 

 Narrowly conical, light green midrib or vein gall, length 5 mm, diameter i mm. 



Itonid. Caryomyia sp. 



Conical or globose leaf galls with distinct orifice and containing aphids 

 Galls more or less conical above and beneath, opening on the upper surface, 

 both nipples surrounded at the apex by a fringe of long filaments, walls thin. 



Fig. 46. Hickory tube gall, Caryomyia 

 t u b i c o 1 a O. S. Group of galls on under 

 side of leaf and several stages shown below in 

 profile. (Original) 



more or less transparent, diameter 5 to 12 mm, height 4 to 6 mm. Perg. '04, 

 p. 190 



Aphid. Phylloxera caryaeseptem Shim. 



Similar to the preceding, with both cones very much elongated, slender and 



_ toothlike, length of cones 3 to 8 mm, diameter 2 to 4 mm. Perg. '04, p. 190 



Aphid. Phylloxera caryaeseptem vShim. var. perforans 



Perg. 

 Galls conical above, opening on the upper surface, flat beneath, splitting into 

 several bracts when mature, with slender filaments at the center beneath, 

 walls papery, more or less transparent, diameter 5 mm. Perg. '04, p. 194 



Aphid. Phylloxera caryaefoliae Fitch 



Galls similar to P. caryaeseptem, opening on upper surface, smaller, 



more flattened but slightly convex above and beneath, opening round or 



oval, surrounded by short, recurved, pubescent bracts, a minute, closed nipple 



beneath, diameter 3 to 6 mm, height 2 to 3 mm. Perg. '04, p. 197 



Aphid. Ph ylloxera picta Perg. 



'Schizomyia caryaecola Felt was supposed to have been reared from this gall. 

 The one or two specimens obtained were probably accidental. 



