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 wings, 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 

 Myrmeleonidse, 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 with 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. TRICHOPTERA. 

 THIS order, which is not adopted by all entomolo- 



