NATURAL HISTORY SOCIETY OF GLASGOW. ■ 307 



mouth obscure testaceous, covered with a longer pile that the rest 

 of the head ; tips of mandibles black. Thorax black, shining ; 

 mesonotum obscurely punctured, and covered with a microscopic 

 pile ; breast smooth and shining. Teguhe whitish ; abdomen 

 black ; the surface covered with a microscopic brown ; apex 

 angustate, pilose ; anus pale white, pilose ; sheath of the saw 

 largely projecting and pilose. Feet stout; femora stout, for the 

 greater part black; their apical third, knees, tibiae, and tarsi, 

 sordid testaceous; coxse and trochanters paler than the femora; 

 tips of tarsi fuscous; posterior tarsi apparently equal in length to 

 the tibiae. Wings clear hyaline; costa and stigma sordid white ; 

 nervures black ; second recurrent nervure received a short dis- 

 tance in front of the second submarginal. 



The male has the antennae thicker and longer than in the other 

 sex, with the stigma slightly darker ; the anus pale ; otherwise it 

 agrees with the female, mutatis mutandis. 



Judging from the descriptions, this species comes nearest to N. 

 dolichurus and N. crassispimis, Thoms., both of which are only 

 known to me from the descriptions. It cannot be the former, as 

 the cerci are not long ; and from the latter species it differs in 

 having the anus pale-white ; for the rest it agrees well enough 

 with the description of iV. crassispinus (except that the posterior 

 calcaria can scarcely be called " subcurvatis ") ; yet, as we hiive no 

 information regarding the early stages of the last mentioned species, 

 nor authentic types for comparison, I think it better to regard N. 

 herbacece as distinct from it. 



It may be easily known from N. femoralis (ante, p. 295), by its 

 black pronotum and unicolorous stigma ; and the latter peculiarity 

 serves also to distinguish it from N. Vallisnieri. 



The Rev. A. E. Eaton sent me for examination a number of a 

 saw-fly which he took on stunted willows in Spitsbergen. Ail the 

 specimens are males, and have a very close resemblance to N. her- 

 bacece, but the colour of the legs and of the mouth is much darker, 

 and the posterior tibiae are longer than the tarsi. The diff"erence 

 in coloration is not, of course, of much importance, but the other 

 difference, combined with darker coloured wings, and a dissimi- 

 larity in the alar neuration, seems to show that they pertain to 

 another species. They may be either N. dolichurus or N. crass-i- 

 sjnnus. Without types of these two species, I do not-ppl^bw 4^16 

 Spitzbergen insects are to be identified. /vV^^-— -? ^ ^^ 



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