598 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



156. Nematus s.-pomum Walsh. Ihid.^ p. 255. 



157. Nematics s.-desmodioides Walsh. 



158. Nematus s.-pisum Walsh. Proc. Ent. Soc. Phila., vi, 1866, p. 250. 



159. NemaUis trilineatas Nortou. Ou weeping willow. Packard's 



Guide to Study of Insects, p. 220 ; foot note. 



The following iuquiliues 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. 



162. Nematus mendicus Walsh. Ibid., p. 261. 



163. Nematus fur Walsh. Ibid., p. 263. 



164. Pristiphora sycophanta Walsh. Ibid., p. 263. 



Order Diptera. 



165. Gecidomyia salieis-brassicoides Walsh. Proc. Ent. Soc. Phila., vi, 



1866., p. 577. 



166. Gecidomyia s.-strobiloides Walsh. Ibid., p. 582. 



167. Cecidomyias.-strobilisGus Walsh. Ibid., ]}.5S2. (Gall only known). 



168. Gecidomyia s.-gnaphalioides Walsh. Ibid., p. 585. 



169. Gecidomyia s.-rhodoides Walsh. Ibid., p. 587. 



170. Gecido7nyia s.-coryloides W'dlsh. Ibid., p. 5S8. (Gall only known.) 



171. Gecidomyia s.-cornu Walsh. Ibid., p. 590. (Gall only known.) 



172. Gecidomyia s.-siliqua Walsh. Ibid., p. 594. 



173. Gecidomyia s.-triticoides Walsh. Ibid., p. 599. 



174. Gecidomyia s.-batatas Walsh. Ibid., 606, 



175. Gecidomyia s.-verruca Walsh. 



176. Gecidomyia s.-hordeoides W?i\sh. J&i<?., p. 599. (Gall only known.) 



177. Gecidomyia albovittataVi alsh. Ibid., ]). G20 ; vi, p. 227. luquiliue 



in willow galls. 



178. Gecidomyia cornuta Walsh. Ibid., p. 625. Inquiline in willow 



galls. 



179. Gecidomyia orbitalis Walsh. 



180. Gecidomyia s.-nodulus Walsh. i&i<?., p. 601-604. 



181. Gecidomyia salicis Fitch (= rigidai O. S.) Maine. Ibid., p. 598. 



182. Diplosis atrocularis Walsh. Ibid., p. 626. 



183. Diplosis atricornis Walsh. Ibid., p. 628. 



184. Diplosis annulipes Walsh. Ibid., p. 629. 



185. Diplosis 10-maculata Walsh. Ibid., p. 631. 



186. Diplosis 1-maculata Walsh. Ibid., p. 630 ; vi, p. 228. 



187. Lonchwa f sp. 1 have observed the larva, pupa-case, and fly of 



this species, which was referred with doubt by Baron Osten- 

 Sacken to the genus Lonchiea. The larva was common at Bruns- 

 wick, Me., raising large blisters on the twigs of the willow. It 

 was figured and briefly described in my Guide to the Study of 

 Insects, p. 412. 



