598 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
156. Nematus s.-pomum Walsh. Ibid., p. 265, 
157. Nematus s.-desmodioidcs Walsh. 
L58. Nematus s.pisum Walsh. Proc. Ent. Soc. Phila., vi, 1866, p. 250. 
159. Nematus trilineatas Norton. On weeping willow. Packard's 
Guide to Study of Insects, p. 220; foot note. 
The following inqnilines or guest-gall saw-flies occur in willow galls: 
160. Nematus inquilinus Walsh. Proc, Ent Soc. Phila., vi, 1866., p. 260. 
161. Nematus hospes Walsh. Ibid., p. 261. 
102. Nematus mendicus Walsh. Ibid., p. 261. 
163. Nematus fur Walsh. Ibid, p. 263. 
164. Pristiphora sycophanta Walsh. Ibid., p. 263. 
Order Diptera. 
165. Cecidomyia saUcis-brassicoides Walsh. Proc. Ent. Soc. Phila., vi, 
1866., p. 577. 
166. Cecidomyia s.-strobiloides Walsh. Ibid., p. 582. 
167. Cecidomyia s.-strobiliscus Walsh. Ibid., p. 582. (Gall only known). 
168. Cecidomyia s.-gnaphalioides Walsh. Ibid., p. 585. 
169. Cecidomyia s.-rhodoides Walsh. Ibid., p. 587. 
170. Cecidomyia s.-coryloides Walsh. Ibid., p. 588. (Gall only known.) 
171. Cecidomyia s.-cornu Walsh. Ibid., p. 590. (Gall only known.) 
172. Cecidomyia s.-siliqua Walsh. Ibid., p. 594. 
173. Cecidomyia s.-triticoidcs Walsh. Ibid., p. 599. 
174. Cecidomyia s.-batatas Walsh. Ibid., 606. 
175. Cecidomyia s.-verruca Walsh. 
176. Cecidomyia s.-hordeoides Walsh. Ibid., p. 599. (Gall only known.) 
177. Cecidomyia albovittata Vf&ish. Ibid., p. 620; vi, p. 227. Iuquiline 
in willow galls. 
178. Cecidomyia cornuta Walsh. Ibid., p. 625. Iuquiline in willow 
galls. 
179. Cecidomyia orbitalis Walsh. 
180. Cec ido my ia s. -nod ulus Walsh. 1 bid., p. 601-604. 
181. Cecidomyia salicis Fitch (= rigidae O. S.) Maine. Ibid., p. 598. 
182. Diplosis atrocularis Walsh. Ibid., p. 626. 
183. Diplosis atricomis Walsh. Ibid., p. 628. 
184. Diplosis annulipes Walsh. Ibid., p. 629. 
185. Diplosis 10-maculata Walsh. Ibid., p. 631. 
186. Dijylosis 7-maeulata Walsh. Ibid., p. 630 ; vi, p. 228. 
187. LoncJuva ? sp. 1 have observed the larva, pupa-case, aud fly of 
this species, which was referred with doubt by Baron Osten- 
Sacken to the genus Lonchoea. The larva was common at Bruns- 
wick, Me., raising large blisters on the twigs of the willow. It 
was figured and briefly described iu nay Guide to the Study of 
Insects, p. 412. 
