[nsect Galls. 21 



Dryoplianta lanata Gillette. Fig. 2.~>. 



Dryophanta lanata Gillette, Bull. 111. stale lab. rial . hist., 1891, v. 3, p. 198, pi. 9, fig. 5. 



A cluster of several lighl In-own. wooly galls, sometimes pink-tinted, 

 found on the under side of the leaf. Individual galls cone-shaped, mono- 

 thalamous, attached by tip of cone to common center. About 5 nun. 

 wide. ")-7 mm. high. The galls fall from the leaf in early autumn. The 

 flies emerge the following spring. Common on scarlet oak, Quercus 

 coffined. Figured on red oak, Q. rubra. 



Holcaspis fasciata Bassett. Fig. 43. 



Holcaspis fasciata Bassett, Trans. Amer. ent. soc, 1900, v. 26, p. 328-329. 



Spherical, smooth galls arranged in lines near the tips of the year's 

 growth. In the fall full of a fleshy mass with no distinct organism. 5-15 

 mm. in diameter. Banded with irregular red and green spots. Turning 

 dark and falling to the ground, where, during the next summer, the larva 

 develops and emerges the succeeding fall. Common on scrub oak, 

 Quercus nana; also found on Q. coccinea, (J. velutina -and Q. rubra. 



Quercus palustris. 

 Cecidomyia foliora Russell and Hooker. Fig. 30. 



Cecidomyia foliora Russell and Hooker. Ent. news, 1908, v. 19, p. 349-352, pi. 14. 



Kelt, 23d rept. ins. N. Y. f. 1907, 1908, p. 384, 415. 

 Cecidomyia erubescens <>sten Sacken, who described the gall only, in Loew'sMon. dipt. X. 

 A., 1862, pt. 1, p. 200. 

 This gall consists of a rolling of the edge of the leaf over to the upper 

 surface. Occasionally the larva begins eating at a hole in the leaf, caus- 

 ing the roll at that place. Color more or less red. One or more larvae. 

 May. Common on scarlet oak, Quercus coccinea. Sometimes on black 

 oak, (J. velutina, and pin oak, (J. palustris. 



Cecidomyia majalis Bassett. See. p. 17. 



Callirhytis cornigera Osten Sacken. Horned-knot oak-gall. 



Cynips quercus-cornigera Osten Sacken, Proc. Ent. soc. Phil., 180'.', v. 1, p. 251. 

 Cynips cornigera Osten Sacken, Proc. Ent. soc. Phil.. 1865, v. 4, p. 358. 

 Andricus (Callirhytis) cornigera Bassett, Amer. nat., 1882, v. It;, p. 246. 



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



Gillette, Psyche, 1889, v. 5, p. 185, 221. 



Packard, 5th rept. r. s. ent. comm., 1890, p. 10.">. 



Beutenmuller, Bull. Amer. urns. nat. hist., 1892, v. 4, p. 253, pi. 

 10, lig. 3. 



Cook, Ohio nat., 1904, v. 4, p. 122-123, 143-144, tig. 130. 



Irregularly spherical, indented at union with stem, rough with protub- 

 erances from which the insect emerges. Polythalamous. Hard, woody, 

 2-5 cm. in diameter. Color of the branch of pin oak, Quercus palustris, 

 on which it is found. Not common. Insects emerge in September; two 

 sexes. 



Callirhytis palustris Osten Sacken. Succulent oak gall. Fig. 37. 



c>/iiil>x quercus palustris Osten Sacken, Proc. Ent. soc. Phil., 1861, v. 1, p. 51, 62-63; lSti."), v. 4, p. 

 359; Trans. Amer. ent. soc, 1870, v. 3, p. 54-55. 

 Bassett, Croc Ent. soc. Phil., 1863, v. 2, p. 329. 

 Walsh, Proc. Eut. soc. Phil., 1864, v. 2, p. 488. 



