[nsect Galls. 27 



Cynips? cristata, n. s. See p. 24. 

 Holcaspis fascial a .Bassett; Seep. 21. 



Quercus alba 



Eriophyes querci Garnian. See p. 24. 



Cecidomyia? poculum Osten Sacken. Oak spangles. 



Cecidomyia poculum Osten Sacken, in Loew's Mon. dipt., N. A., 1862, pt. 1, p. -201. 



Beutenmiiller, Bull. Amer. mus. nat. hi.st., 1892, v. 4, p. 271, pi. 15, llfi'. 4; 

 Ins. galls vicin. N. V., 1904, p. 30, fitf- 



Jarvis, 37th ann. rept. Ent. soc. Ontario, 1906, p. 69. 



Small, saucer-shaped galls on under side of leaf. 2-3 nun. in diameter. 

 Red or violet with white bloom. On white oak, Quercus alba. Common. 

 August and September. 



Andricus fiocci Walsh. See p. 25. 



Andricus petiolicola Bassett. Oak petiole-gall. Fig. 55. 



Cynips quercus-petiolicola Bassett, Proc. Ent. soc. Phil., 1863, v. 2, p. 325. 



Walsh, Proc. Ent. soc. Phil., 1864, v. 2, p. 487. 

 Cynips petiolicola Osten Sacken, Proc. Ent. soc. Phil., 186.5, v. 4, p. 339, 351, 379. 

 Andricus petiolicola Bassett, Amer. nat., 1882, v. 16, p. 246. 



Ashmead, Trans. Amer. ent. soc, 1885, v. 12, p. 295. 



Gillette, Psyche, 1889, v. 5, p. 186. 



Packard, 5th rept. D". S. ent. coinin., 1890, p. 105. 



Beutenmiiller, Bull. Amer. mus. nat. hist., 1892, v. 4, p. 257, pi. 13, fig. 2. 



Cook, Ohio nat., 1904, v. 4, p. 120, 126, 142, fig. 83, 103, 124. 



Jarvis, 37th ann. rept. Ent. soc. Ontario, 1906, p. 70. 



A woody, club-shaped gall on petiole or midrib of leaf. Polythala- 

 mous. About 15 mm. in diameter. Green becoming brown. Common 

 on white oak, Quercus alba, chestnut oak, Q. prinus and dwarf chestnut 

 oak, Q. prinoides. 



CaUirhyUs clavula Osten Sacken. White-oak club-gall. 



Cynips quercus-tuber Bassett, Proc. Ent. soc Phil., 1864, v. 3, p 685-687; 1885, v. 4, p. 351. 

 Cynips clavula Osten Sacken, Proc. Ent. soc. Phil., 1865, v. 4, p. 351, 379. 

 Andricus (Callirhyiis) clavula Bassett, Amer. nat., 1882, v. 16, p. 246. 



Ashmead, Trans. Amer. ent. soc , 1885, v. 12, p. 294. 



Packard, 5th rept. U. S. ent. comm., 1890, p. 105, 113. 



Beutenmiiller, Bull. Amer. mus. nat. hist., 1892, v. 4, p. 255-256, 

 pi. 11, fig. 3. 



Cook, Ohio nat., 1902, v. 2, p. 272, fig. 33; 1903, v. 3, p. 419. 



Jarvis, 38th ann. rept. Ent. soc. Ontario, 1907, p, 91, pi. C, fig. 3. 



Club-shaped woody gall at end of twigs. Sometimes leaves develop 

 from the bud of which this gall is a malformation. Polythalamous, 2-4 

 cm. long. Green occasionally faintly marked with red, turning brown. 

 Common on white oak, Quercus alba. Insects from April to July. 



Callirhytis futilis Osten Sacken. Oak wart-gall. 



Cynips guercus-futilis Osten Sacken, Proc. Ent. soc. Phil., 1861, v. 1, p. 63-64. 

 Cynips futilis Osten Sacken, Proc. Ent. soc. Phil., 1865, v. 4, p. 339, 352. 

 Andricus futilis Osten Sacken, Proc. Ent. soc. Phil., 1865, v. 4, p. 379. 

 Andricus (Callirhytis) futilis Bassett, Amer. nat., 1882, v. 16, p. 246. 



Ashmead, Trans. Amer. ent. soc, 1885, v. 12, p. 294. 



Gillette, Psyche, 1889, v. 5, p. 185. 



Packard, 5th rept. U. S. ent. comm., 1890, p. 105. 



