American Insect Galls: Thompson 61 



154. Cynipidae. Oak. Mass. April. Gall like Amphibolipit inanis but kernel is wholly free. 

 No trace of fibers within. Oval central kernel with one exit. 



161. Cynipidae or Fungus. Q. nigra. Mass. April. Globular elevations on stem of twigs; 



sessile, very rugose and suggests fungoid growth. Lj'coperdon gall, plate 16, 161. 

 162. ^. Petiole gall. Q. alba. R. I., Mass. Aug. Cluster of ovoid cells about 4 



mm. long x 2.5 mm. at greatest diameter, plate 15, 162. 

 Probably Holcaspis globulus Fitch. 



163. Cynipidae. Quercus species. Resembles Holcaspis globulus. Point of attachment small, 

 but not sunk into twigs as in case of Holcaspis fasciata. 



174. . Peach gall. Q. prinoides. Mass. April. On petiole. Globular, fleshy; 



externallj' rugose, ruddy. Wall 1-3 diameter, plate 16, 174. 



Andricus (.■') pcliolicola Bass. 



175. Cynipidae. Q. rubra, Q. ilicifolia. Mass. May 23. Full size, but succulent. June 1st. 



Falls to ground. On twigs, plate 16, 175. 

 (.') Neurotertis sp. 



176. . Q. niger. May. Terminal twigs in center of leaf rosette in size from 1-5 



mm.; glol)ular, dense, with minute central cell, shining and smooth, and very loosely 

 attached. 



183., . Quercus. Mass. June. Ovoid, pointed at apex; 3 mm. long; evidently a 



modified terminal bud. 

 186. Coccidae. Coccid gall. Oak. Mass. June. Heavy swelling on upper side of petiole; 



on mid-rib sometimes. 

 207. Cecidomyia. Q. rubra. Mass. Mid-June. On leaf. 5 mm. long by 2.5 high. Steep- 



- sided crest with wavy, ruddy summit. Cecid. larva within. 

 236. Petiole gall. Oak species. Enlargement of base of petiole. R. I., Mass. June. 1-2 cm. 



x 3 mm. Central cell, plate 17, 236. 

 246. Cynipidae. Q. prinoides.^ Mass. July. On leaf. Perfectly globular but rather strongly 



attached. Whitish with brown pubescence occurring in spots. Solid with small 



central chamber, plate 16, 246. 

 Unknov\Ti, 



249. . Oak twig. New growth. Main twig dwarfed and killed above gall. Lateral 



twig much enlarged and extremely so at the various succeeding points of infection. 



269. . Q. prinoides. Mass. July. Globular, fuzzj', externally like No. 246, but 



has larger cavity, thin walls and seems to be cecidomyious. 

 (?) Cynipid. 



271. . Q. coccinea, Q. ilicifolia. Mass. July. On lateral veins on upper side of leaf, 



a minute grey cell loosely fastened to vein and clothed' with pale crimson, silky 

 hairs. Sort of rosette 3 mm. in diameter. Probably variety of C. verrucarum, t)nly 

 hairs are too regular, plate 16, 271. 

 Neurolerus (?) verrucarum O. S. 



273. Cynipidae. Q. ca.^lanea. Mass. July. On main or lateral veins above leaf. 8 mm. in 

 diameter, globular; surface roughened by minute, conical, red i)oints. Resembles 

 Philonix pezomachoides, but cavity is single and large, wall thin and leathery. 

 Probably Philonix pezamachoides O. S. 



276. . 0. S. '62, p. 255. Q. alba, Mass. Aug. Wedge-shaped with base elevated 



into a point. Small about 1 cm. ovoid, iirismatic with clusters usually on under 

 side of petiole. 6-8 cells closely packed, free surfaces have dense, brown, wool 

 pubescence, plate 16, 276. 



Probably Cynips slrobilana O. S. 



