OF THE HIND WINGS OF HYMENOPTEROUS INSECTS. 133 
Ophion (America) has 6. 5 grow together in a row, and 1 about the length of that row distant from 
them, towards the base. There is something; like the scar of a missing: hook in the interval. 
Paniscus inquinatus has 1. 
Paniscus glaucopterus has 1 • 
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from the fringe of hairs which cease when these begin. They 
differing 
between the hooks and hairs. 
> 
Tryphon has 1. 
Pimpla (N. America) has 1, 2 r 
Pimpla (England) has 1. 
Pimpla Turionellce has 1 \ 
r>> , . . , , I nearly straight 
Pimpla vancornis has 1 J J ° 
Rhyssa has 1 (hook lost). 
Ephialtes has 1. 
Osprynchotus has 6. 
In Trogus (fig. 23) there is one ; fine and quite straight, on the margin of the membrane 
of the wing, beyond the end of the upper division of the costal nerve, about midway 
between the base of the wing and the distal hooks. 
In Mesostenus there are 3-4 ? on the membrane as above, but not quite at the margin ; 
rather nearer to the base than to the distal hooks. 
In Cryptus (fig. 14) they are on the membrane, not marginal, midway between the base 
and the distal hooks, slightly curved. In another species there are 4, large and 
strong, with a double curve, nearer the base than the centre of the wing. The mar 
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9 
of the wing is bent (accidentally ?) ; and I cannot tell whether they are on the nerve or 
the membrane. There are strong hairs on either side of the hooks in a line with them. 
In Hemiteles there is one ; fine, straight, and erect, nearly on the margin of the membrane 
of the wing, above the costal nerve, rather nearer to the base than to the distal hook>. 
In the following species of the tribe Fossores they are large, strong, and curved at the 
tip, and situated on the upper branch of the costal nerve. 
In Pompilhle, out of five exotic species of Pompilus, two have sub-basal hooks (2 ?, 7- 
in number) ; but, owing to the darkness of the wings and the dense covering of hair, 
it is not easy to ascertain the number. 
Macro meris violaceus has 14. 
Pepsi* (Brazil). Of six species, four have sub-basal hairs : pretiosa has 1 ; apicalis 8 ; viridisetosa 5 - 
limbata 7? (fig. 325). 
In Sphegid^e they are of the same form as in Pompilid.e. 
Sphex (Brazil) has 7 or more, close together, on the margin of upper branch of costal 
nerve, near base. 
ChloHon (India, 1) has 17, near margin of wing, commencing further from the base than 
in Sphex, growing at irregular intervals. 
CJilarion (India, 2) (fig. 33 b) has 22-23 ? near margin of wing, commencing further from 
the base than in Spkex, at irregular intervals. 
In Astata Boops (Larridjs) (fig. 35 a) they are 7 in number, growing on the costal nerve, at 
rather wide intervals, near the distal hooks. Very strong. Those nearest the base 
almost straight ; those towards the distal hooks sharply curved at the tip. A row 
of strong straight hairs grows in a line with them on either side, and between them. 
