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294 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. XXVIII. Fig. 2. Newman; Ent. Mag. No. 24, p. 400. 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 Myrmeleonidæ, and differs from the typical genus Myrmeleon chiefly in the very short palpi, (the maxillary pair having only four joints,) and in the neuration of the posterior wings, the fourth longitudinal nerve not being furcate, and the fifth extending considerably 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, which is not adopted by all