On nexo Genera o/Tclmeumonidte, 275 Key to the Species. A. Uiiderparts grey. rt'. Tail with black tip and no hoary ends to hairs. a-. Back deep orange Sc. caniceps (winter). h'^. Back uniformly grizzled. (i^. Sides of neck of same colour as the back Sc. caniceps (summer). b^. Sides of neck with patch of colour. «*. Patch on the neck deep chestnut. . Sc. epomophortis. b*. Patch on the neck pale rufous .... Sc. e. Davisoni. f>\ Tail with black tip and hoary ends to the hairs Sc. concolor. B. Underparts buff or yellow. «'. Tail with black tip. «-. Colour of underparts not bordered by a dark stripe on flanks Sc. pyyerythruA. li' . Colour of underparts bordered by a dark stripe on flnnks Sc. p. Phayrei. h\ 'I'ail M'ith no black tip Sc. griseimanus. XXXVI. — Descriptions of Seventeen nexo Genera of Ichneu-nionidje from India and One from Australia. By P. Cameron. In tliis paper I have described a number of well-marked genera of Ichneunionidos, mostly belonging to the Joppini and the Heresia.rachini. Very little has been published upon the Joppini occurring in India, but in all probability they will prove to be quite as numerous there as in the Neotropical Zoological Region, which has iiitherto been looked upon as the headquarters of the group. Two genera of Indian Joppini have been described by Dr. Kriechbaumer in Ent.Nachtr. xxiv. 1898, where he also revises the genera ; and there is a further revision of them by Mr. W. H. Ashmead in Bull. U.S. Nat, Mus. xxiii. 1900. The Heresiarachini are easily known by their toothless mandibles. This tribe appears to be well represented in India, but no species has hitherto been recorded, therefrom. The species are in the collection of IMr, G. A. J. Kothney. Gathetus, gen. nov. Wings with an apical cloud. Areolet five-angled, nar-rowed at tlie top, Antennse short, thickened and compressed beyond the middle. Cheeks swollen. Labrum hidden. Scutellum flat, the sides not margined, the apex incised in the
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