American Insect Galls: Thompson 13 



Andricus piger Bass. '81, p. 105-106 (Cynips), 9 , Q. tinctoria, Conn. Autumn. Beut. '04, Q. 

 veluiina, N. Y. ; Q. rubra, Mass. 

 Fly late Sept. Swelling on mid-vein, plate 2, 213. 

 Callirhytis cellae Ash. '87b, p. 141-142, 9 , Q. laurifolia, Fla. Slight swelling. 

 Neuroterus politus Bass. '90, p. 89, (f, Q. undulata (?), Utah. Swelling on mid-vein. 

 N. quercicola D. T. 



Neuroterus flavipes Gill. '90, p. 21-22, cf 9 , Q. macrocarpa, Iowa, July 6. 



Hard swelling of mid-vein or lateral vein. 3-4 x 1-4 in. 

 Neuroterus gillettei Bass. '00, p. 334, d' 9 , Q- obtusiloba, Conn. Pustular swelling. 

 *Neuroterus tectus Bass. '00, p. 331. Cell in mid-vein, distorting leaf. 



(C) The whole leaf (?) is swollen to a fleshy, elongated gall. 



Neuroterus noxiosus Bass. '81, p. 108-109 (Cynips), cf 9', Q. bicolor, Conn. 

 Spring, June (see page 6 for autumnal gall), plate 4, 118. 



3. Galls involving or attached to the lamina of the leaf — • 



(A) Small blister-like or pustular swellings of the leaf-blade. 



Neuroterus howertoni Bass. '90, p. 90, 9 , N. Mex. Blotches, walls thin. 

 Neuroterus perminimus Bass. '00, p. 332, c? 9 , Q. alba, Ohio. June, July. Minute blister. 

 N. nigrum Gill. 



Neuroterus nigrum Gill. '89, p. 218-219, 221, fig. 5, 9 ,Q. alba, Q. macrocarpa, Mich., Iowa. Mid- 

 May. Q. alba, Mass. Mid-May. 

 Over winters, plate 4, 141. 



(B) Bhster above lamina, woolly gall beneath. 



Neuroterus fioccosus Bass. '81, p. 111-112 (Cynips), 9 , Q- bicolor, Conn. 

 Over winters. Spring, Mass., plate 2, 103. 



(C) Rounded galls with several cells imbedded in the lamina of the leaf. 



Callirhytis futilis 0. S. '61, p. 63-64 {Cynips), cf, Q. alba, D. C, spring. Early July, Beut. 'Cat. 

 '04, Q. alba, N. Y., fly, July: Bass. '63, Conn.; Bass. '89, Q. alba. Conn.: Gill. '89, Q. 

 alba, Mich.; Q. alba, Q. stellata, Mass. 

 2-3 cells, plate 5, 49. 

 Callirhytis papillatus 0. S. '61, p. 64-65 (Cynips), cf , Q. prinus, D. C. Late June. Beut. Cat., 

 Q. prinus, N. Y., fly in June: Cook '05, p. 827, Ind.; Q. cocdnea, Mass. 

 2-3 cells, plate 4, 57. 

 Callirhytis modesta O. S. '61, p. 65-66 {Cynips), 9 , Q- rubra, D. C. Late June. 



(D) Galls making a sort of thickened and elevated area in the lamina. 

 (o) The platform is formed of crowded, inonothalamous galls. 



Dryophanta papula Bass. '81, p. 107-108 {Cynips), 9, Q. rubra. Coim., Q. tinctoria, Mass.: Gill. 

 '89, Q. cocdnea, Q. rubra, Mich. Fly, July 12. 

 Conical, confluent, plate 4, 270. 



(6) The platform is made by a single polythalamous gall. 



Neuroterus favosus Bass. '90, p. 87-88, cf 9 , Q. tinctoria, Ohio; Q. palustris, Q. i-ubra, Mass. 

 Irregular, pustular, elevated area, plate 3, 66. 



