Kinsey : Gall Wasp Genus Cynips 
297 
ber 16, and spotted galls of the normally spotted varieties 
rubrae and strians from September 9 to January 21. Only 
with variety centricola do we regularly find galls of both types, 
and the data do not seem to show whether hereditary or envi- 
ronmental factors are concerned in this instance. 
The galls of centricola superficially resemble those of 
Amphibolips inanis, a black-oak species of the eastern United 
States; but inanis galls are distinguishable by their host and 
by their fewer, coarser fibers, and by numerous other points. 
The galls of centricola even more closely resemble those of the 
Pacific Coast species, Cynips mirabilis, but the galls of mira- 
bilis have denser fibers inside. Mirabilis and centricola belong 
to distinct subgenera. Some of the unspotted galls of Cynips 
centricola clivorum also approach near identity with the galls 
of Cynips bella and Cynips dugesi. 
Centricola is in several respects distinct from the other 
species of the subgenus Atrusca, but these differences are not 
fundamental enough to warrant the establishment of another 
subgenus for one species. 
Cynips centricola variety centricola Osten Sacken 
agamic form 
Figures 47, 271, 284 
Cynips quercus centricola Osten Sacken, 1861, Proc. Ent. Soc. Phila. 
1 : 53, 58. Cresson, 1862, Proc. Ent. Soc. Phila. 1 : 202. 
Cynips q. centricola Osten Sacken, 1862, Proc. Ent. Soc. Phila. 1:246, 
247. Riley, 1871, Canad. Ent. 3: 195. 
Cynips centricola Osten Sacken, 1865, Proc. Ent. Soc. Phila. 4: 339, 345, 
347, 350, 375. Packard, 1881, U.S. Ent. Comm. Bull. 7 : 56. 
Loxaulis centricola Ashmead, 1885, Trans. Amer. Ent. Soc. 12 : 296. 
Holcaspis centricola Ashmead, 1885, Trans. Amer. Ent. Soc. 12: 304. 
Ashmead, 1887, Trans. Amer. Ent. Soc. 14: 127, 202. Cresson, 
1887, Trans. Amer. Ent. Soc. 14: suppl. 179. Ashmead in Packard, 
1890, 5th Rpt. U.S. Ent. Comm.: 106, 110. Dalla Torre, 1893, Cat. 
Hymen. 2: 55. Comstock, 1895, Manual Ins.: 619. Dalla Torre, 
1898, Cat. Hymen. 5: 7. Dalla Torre and Kieffer, 1902, Gen. Ins. 
Hymen. Cynip.: 53. Kellogg, 1904, Amer. Ins.: 471. Felt, 1906, 
Ins. Aff. Pk. & Woodl. Trees 2:711. Beutenmiiller, 1909, Bull. 
Amer. Mus. Nat. Hist. 26: 42, pi. 9 fig. 1. Beutenmiiller in Smith, 
1910, Ins. N. J.: 600. Thompson, 1915, Amer. Ins. Galls: 17, 39. 
Dryophanta centricola Mayr, 1902, Verh. zoo.-bot. Ges. Wien 52: 290. 
Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip. : 82. Beuten- 
muller, 1911, Bull. Amer. Mus. Nat. Hist. 30:352. Felt, 1918, N.Y. 
