OAK GALL-FLIES. 107 



NEUROTERUS, Hartig. 



14;"). batata, Bass. (Cynips) Proc. Ent. Soc. Phil, iii, p. 684; Fitch, Fifth Rep. No. 

 311. 



146. noxiosus, Bass. {Cy^iips) Cau. Eut. xiii, p. 108. 



147. vesiculus, Bass. (Cynips) Proc. Eut. Soc. Phil, iii, p. 683. 



148. irregularis, O. S. (Cynips) 1. c. i, p. 65. 



149. verrucarum, O. S. (Cynips) 1. c. p. 62. 



150. minutus, Bass. (Cynips) Can. Ent. vol. xiii, p. 96. 



151. floccosus, Bass. (Cynips) 1. c. p. 111. 



152. affiiiis, Bass. (Cynips) 1. c. p. 103. 



153. piger, Bass. (Cynips) 1. c. p. 105. 



154. corrugis, Bass. (Cynijjs)!. c. p. 109. 



155. majalis, Bass. (Cynips) Proc. Ent. Soc. Phila. iii, p. 683. 



156. rileyi, Bass. (Cynips) Am. Nat. 1881, p. 149; Am. Ent. vol. iii, p. 153 (figure 



of gall). 



157. crassitelus, Prov. Le Nat. Can. vol. xii, p. 232. 



158. minutissimus, Ashm. (Cynips) Proc. Ent. Soc. 1885, p. vii. 



159. confusus, Ashm. (Cynips) 1. c. 1881, p. xviii. 



160. coniferus, Ashm. (Cynips) I. c. p. xxvii. 



The following species were characterized from the galls alone and their ge- 

 neric position is uncertain : 



161. Cynips pilulae, Walsh Proc. Ent. Soc, Phila. vol. iii, p. 481. 



162. Cynips juglaijs, Osten Sacken 1. c. vol. ii, p. 256. 



183. Cynips cicatricula, Bassett, Can. Eut. vol. xii, p. 105. 



Division II.— Inquilix^, or Guest Gall-flies.* 



PERICLISTIS, Forster. 



sylvestris, O. S. (Aulax) Proc. Ent. Soc. Phila. vol. iii, p. 37. 

 pirata, O. S (Aulax) 1. c. vol. i, p. 64. 

 futilis, O. S. (Aulax) 1. c. vol. i, p. 64. 

 semipiceus, Harris (Cynips) Ins. Inj. Veg. p. 549. 



CEROPTRES, Hartig. 



ficus, Fitch (Cynips) Fifth Rep. No. 314. 



petiolicola, O. S. (Amblynotus) 1. c. vol. i, p. 67 ; vol. v, p. 380, 



Amblynotus ensiger Walsh, 1. c. vol. ii, p. 496. 

 inermis, Walsh (Amblynotus) 1. c. vol. ii, p, 598; (Ceroptres) 1. c. vol, v, p, 380. 

 arbos, Fitch (Cynips) Fifth Rep. No. 310. 

 tuber, Fitch (Cynips) 1. c. No. 309, 

 obtusilobae, Ashm. Trans. Am. Ent. Soc, xii, p, 301. 

 citriformis, Ashm. 1. c. p. 300. 

 pomiformis, Ashm. 1. c. p. 300. 

 virentis, Ashm. 1. c. p, .300, 

 succinipedis, Ashm. 1. c. p. 300. 

 lanigerae, Ashm. 1. c. p. 301. 

 minutissimi, Ashm. 1. c. p. 301. 

 catesbaei, Ashm. 1. c. 301. 



SYNERGUS, Hartig. 



lignicola, O. S. Proc. Ent. Soc. vol. ii, p. 252; rhoditiformis Walsh 1. c, p. 499. 

 oneratus, Harris (Cynips) Ins. Inj. Veg. 3d ed. p. 548; Fitch Second Rep. No, 

 313; (Synerffus) Osten Sacken 1. c. ante vol. v, p. 380. 



*A8 these are parasites on the other gall-flies, they are not numbered as injurious 

 to the oak. 



