132 MISS STAVELEY ON THE NEURATION 



And in a double or treble row in 



Tenthredinid^. 



Abia sericea, 16. 

 Hylotoma ccerulea, 13. 

 Hylotoma cyan, croc, 11. 

 Hylotoma ustulata (fig. 5), 15 or 16. 

 Hylotoma Ros<2, 12? 

 Hylotoma (England), A. (fig. 3a), 15. 

 Hylotoma femor alls, 12, 13? 

 Hylotoma (England), B. (fig. 4), 15 ? 

 Sciapteryx cost alls, 13. 



Urocerid^e. 



SireiV has 46, i. e.< 3 



Tenth REDiNiD^. 



Tenthredo viridis (fig. 9 a), 15 {-^f}. 



Tenthredo viridis ? ?, 16, growing too irregu- 

 larly to divide. 



Tenthredo Nothus, 13 (|). 



Allanius (N. America) (fig. 1 a), 16. 



Allantus sarophularius, 18 (xV). 



Cephus pyymceus has a single row of 6, beyond the branching of the costal nerve. 

 Chalcid^, fig. 24 a. I have onlv one species of this family; it has three hooks on the termination of 



the only nerve. 

 Chrysidid^. 



Chrysis ignita, 13 ?, 12 cJ ? 



Chrysis bidentata, 13. 



Chrysis (England), 11. 



Sub-basal hooks are found in the families of IcHNEXiMONiDiE, SPHEGiDiE, Chrysidid^e, 

 PompilidtE, LARRiDiE, CrabronidyE, ANDREKiDiE, Nyssonid^, Tenthrebinid^, and 

 THYNNiDiE. In some families, as Ichneumonid^, I have seen no species without. In 

 others, as PoMPiLiDiE, they are sometimes present or absent in different species of the 

 same genus ; and I have found no trace of them in the families ApiDiE, Vespid^e, Etjme- 

 NiD^, ScoLiADxE, DoRYLiD^E, MuTiLLiD^, FoRMiciD^, and Chalcidid^. Of these, how- 

 ever, I have (with the exception of Vespid^ and Apid^) seen very few, in some cases 

 only one species. 



The sub-basal hooks vary much in situation, arrangement, form and number, being 

 sometimes on the nerve and sometimes on the membrane of the wing. They occur at the 

 base of the wing, or midway between the base and the distal hooks ; or a long row begins 

 midway between the base and the distal hooks, ending only at the commencement of the 

 distal row. Sometimes (as in some species of Hylotoma) there are one or two at the com- 

 mencement of the row of distal hooks which can only be classed as sub-basal from their 

 slightly differing in form from the distal hooks, while they agree with the sub-basal of 

 other species which do not commence so near the distal. 



They are generally smaller and straighter than the distal hooks, 1)eiug sometimes quite 

 fine and straight (though still, in most families, quite distinguishable from the hau's, which 

 they then resemble), sometimes strong and straight almost to the end, where they curve 

 suddenly — as in Paniscus. 



In the following species of the family IchneumoxidzE they are strong, curved at the 

 end, and situated on the upper division of the costal nerve, near its termination. 



Ophion obscurus (fig. 17 6) has 2. | Ophion combustus (fig. 18) has 3. 



