no NEW YORK STATE MUSEUM 



Tubular, monothalamous, yellowish red vein gall, truncate and deeply excavated 

 apically, the walls of the cavity contracted near the top, larval cell just beneath 

 and an empty tavity below, height 7 mm, diameter 5 mm. Wash. Trotter 

 '11, p. 107 



Cynipid. ? Trigonaspis vaccinioides Trott 



(15) Small, fleshy galls, clustered on leaves 

 (a) Split midvein in their growth 



Clusters of seedlike bodies, often 30 to 40 together, occur on the under side of 

 the midvein of red oak leaves, the larger cells smooth, greenish white with 

 an enlarged apex and about the size of grains of wheat, on Q. b i c o 1 o r , 

 Q. ilicifolia, Q. rubra and Q. c o c c i n e a . PI. 3, fig. i . Bassett 

 '64, p. 689 



Cynipid. Oak leaf seed gall, Cynips decidua Bass. 



Clustered, pubescent, globular, drab or brownish red midvein galls, frequently 

 splitting and extending along the vein 4 to 8 cm, diameter 3 to 9 mm, occur 

 in clusters of 10 to 100 or more on a leaf, on Q. rubra. PI. i , fig. 6. Bassett 

 '00, p. 314 



Cynipid. Andricus piperoides Bass. 



Pyriform, usually clustered, reddish brown leaf gall with a minute, whitish 

 pubescence and arising from a slit in the basal two-thirds of the midvein, 

 height 5 to 8 mm. Cal. Trotter '11, p. 117 



Cynipid. ? Andricus sp. 



(6) Do not split midvein in growing 



Galls in rounded masses, a few to 30 in each, closely packed, clustered on the 

 under side of the midrib or petiole, monothalamous, globose, pointed basally, 

 greenish, tinged with pink when fresh, grayish when old, individual galls, 

 diameter 2.5 mm to 3 mm, diameter of masses from 6 to 15 mm, on burr oak, 

 dwarf chestnut oak and white oak. Beutm. 'i3e, p. 245 



Cynipid. Cynips dimorphus Gill. 

 Clustered, bell-shaped, monothalamous, greenish or reddish leaf vein gall, shaped 

 somewhat like a huckleberry blossom, length 3 to 4 mm, on Q. minor. 

 Fig. 84, 6. Beutm. '09, p. 255 



Cynipid. Bell-shaped oak gall, Zopheroteras vaccinii 



Ashm. 

 Conical, clustered leaf gall attached to the under surface of the midrib, on Q. 

 bicblor. Gill. '89, p. 217 



Cynipid. Cynips nigricens Gill. 



(16) Galls attached to leaves and covered with woolly fibers 

 (o) Small ceils, each with a separate crown of wool 



Globose leaf gall, densely covered with coarse, brown, mosslike wool, diamete 

 1.25 to 2.50 mm, on under side of leaf, on Q. v i r g i n i a n a . Fig. 107, 4. 

 Beutm. 'loc, p. 123 



Cynipid. Neuroterus minixtissimus Ashm. 

 Globose leaf gall, smooth above, thickly covered with white wool below, single 

 or confluent, diameter 1.5 to 3.5 mm, on Q. alba, Q. blatanoides. 

 Fig. 107, 1-3. Beutm. 'loc, p. 123 



Cynipid. Oak flake gall, Neuroterus floccosus Bass. 



