132 
MISS STAVELEY ON THE NEURATION 
And in a double or treble row in 
Uroceridjs. 
Sirex has 46, i. e. 
Tenthredinid^e. 
Tenthredo viridis (fig. 9 a), 15 (-^). 
Tenthredo viridis ??j 16, growing too irregu- 
larly to divide. 
TfiNTHREDINIDiE. 
Abia sericea, 16, 
Hylotoma ccerulea, 13. 
Hylotoma cyan, croc.^ 11. 
Hylotoma ustulata (fig. 5), 15 or 16. 
Hylotoma Rosce, 12? 
Hylotoma (England), A. (fig. 3 a), 15. 
Hylotoma femoralis, 12, 13? 
Hylotoma (England), B. (fig. 4), 15 ? 
Sciapteryx costalis, 13. 
Tenthredo Nothus, 13 (f). 
Allantus (N. America) (fig. 1 a), 16. 
Allantus scrophularius, 18 ( T %). 
Cephus pygmceus has a single row of 6, beyond the branching of the costal nerve. 
CHALCiDiE, fig. 24 a. I have only one species of this family; it has three hooks on the termination of 
the only nerve. 
Chrysidid^e. 
Chrysis ignita, 1 3 $ , 1 2 <? ? 
Chrysis bidentata, 13. 
Chrysis (England), 11. 
Sub-basal hooks are found in the families of Ichkettmonid^e, Sphegid^e, CHRYSiDiDiE, 
Pompilid^:, Larrid^:, Crabronid^:, Andrenid^, NYSsoxiDiE. Tenthredineue, and 
Thynnid 
In some families, as Ichneumonid^, I have seen no species without 
In 
others, as Pompilid^e, they 
sometimes present or ahsent in different species of the 
same genus ; and I have found no trace of them in the families Apid.e, Vespid^:, Ettme 
nid^e, Scoliad^e, Doryliime, Mtjtillule, Eormicidje, and Chalcidid^e. Of these, how 
I have (with the 
ption of Vespiile and. Apid^e) seen very few 
some 
only one species. 
The sub-basal hooks vary much in situation, arrangement 
sometimes on the nerve and sometimes on the membrane of the wing. They occur at the 
form and number, being 
of the wing, or midway between the base and the distal hooks 
long row begms 
midway between the base and the distal hooks, ending only at the commencement of the 
row. Sometimes (as in some species of Hylotoma) there are one or two at the com- 
distal 
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, being sometimes quite 
fine and straight (though still, in most families, quite distinguishable from the hairs, 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 Ichnettmonid.e they are strong, curved at the 
end, and situated on the upper division of the costal nerve, near its termination. 
Ophion obscurus (fig. 17 b) has 2. 
I 
Ophion combustus (fig. 18) has 3 
