294 
SYSTEMATIC ARRANGEMENT 
genera, we present as an example a new species of 
Nemoptera, a group of very remarkable aspect, owing 
to the extroardinary elongation and narrowness of 
the posterior wings. The specific name refers to 
the shape of the anterior wings, which are more 
acutely angular at the tips than in any other known 
species. It is closely allied to N. Africana of Leach, 
but differs in the form of the w'ings, black stigma, 
spotted anterior margin of the fore wings, and brown 
base of the posterior pair. It is figured of the natural 
size. It is from the Cape of Good Hope. 
STILBOPTERYX COSTALIS. 
Plate XXVIII. Fig. 2. 
Newman ; Ent. Mag. No. 24, p. 400. 
This insect was first described by Mr. Newman in 
the work mentioned above, to which we must refer 
for a detailed account. It belongs to the family 
Myrmeleonidee, and differs from the typical genus 
Myrmeleon chiefly in the very short palpi, (the maxil- 
lary pair having only four joints,) and in the neura- 
tion of the posterior wings, the fourth longitudinal 
nerve not being furcate, and the fifth extending con- 
siderably beyond the same nerve in the anterior 
wings, as though it had united w'ith the lower fork 
of the fourth nerve, and thus supplied its place. 
The insect is a native of Australia ; the specimen 
figured is in the Rev. Mr. Hope’s collection. 
Order V. — Trichopteua. 
This order, which is not adopted by all entomolo- 
