On the ' Challenger ' Neuroptera. 453 The specimen now described, wliilst it agrees in family characteristics with the genera mentioned above, differs consi-derably in those less important peculiarities which constitute their generic features. In each instance the size and orna-mentation of the scales is distinct from this one, and the speci-men now described is also more especially divergent from Thrissonotus and Cosmolepis in the non-extension of the anal fins. There are no intermediate small teeth, as in Centrolepis and others ; and the deeply forked caudal fin, with its long upper lobe invested to its extremity with scales, is a cha-racter which readily distinguishes Oxygnathus^ and separates this specimen from that genus. Hence there appears to be no alternative but to form a new genus under the title Lisso-lepis, with the specific designation serratus. Locality. Lias, Lyme Regis. EXPLANATION OF PLATE XVL Fi(j. \. Lissolepis serratus, Davis. Natural size. Fiy. 1 a. Scales, enlarged. L. — On the Neuroptera collected during the recent Expe-dition of H.2LS. 'Challenger: By W. F. Kirby, Assis-tant in Zoological Department, British Museum. The Neuroptera collected during the voyage of the 'Chal-lenger ' were not very numerous, but included several inter-esting species. With the exception, however, of a small series from the Philijipines, which were sent home in papers, the greater number were destroyed by having been placed in spirit — a means of preserving insects which is just as ill adapted for large-winged insects, like dragonflies, as it is for soft-bodied or hairy insects, which should always be preserved dry. I have only ventured to describe one new species from Tongatabu. NEUROPTERA. ISOPTEEA. Termitidse. 1 . Termes fatal is (?) . Termes fatale, Kou. Schrift. Berl. nat. Freunde, iv. p. 1, pi. i. fi^s 1-9 (1771). Termes fatalis, Hag. Linn. Ent. xii. p. 143 (1858). Philippines.