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Show 1881.] MR. KIRBY ON HYMENOPTERA FROM SOCOTRA. 649 rieures du corps est beaucoup moins jaumitre. Dans l'adulte et dans le jeune les plus longues moustaches n'atteignent pas l'oreille. Monsieur Stolzmann annonce dans sa derniere lettre la capture d'une Belette dilferente de toutes ces especes, plus grande que la M. macroura et distincte par quelques details de la coloration, ce qui confirme l'opinion de M . Tschudi, exprimee dans sa * Fauna Peruana,' sur l'existence de plusieures especes de cet genre dans les Andes de l'Amerique meridionale. 5. On the Hymenoptera collected by Prof. I. Bayley Balfour in Socotra. By W . F. K I R B Y , Assistant in the Zoological Department, British M u s e u m. [Received April 23, 1881.] The small collection of insects lately made in Socotra by Prof. Balfour, and deposited in the British Museum, contained only six specimens of Hymenoptera, belonging to four species. Of these, two are apparently new to science, and the others are well-known and wide-ranging species, the occurrence of which in the island is in nowise remarkable. I proceed to enumerate the species as follows :- APID^E. 1. XYLOCOPA iESTUANS. Apis a?stuans, Linn. Syst. Nat. i. p. 579. no. 37 (1758). A well-known and widely distributed East-Indian species. VESPIDJE. 2. B E L E N O G A S T E R SAUSSUREI, sp. n. Exp. al. 1| in. ; long. corp. 11 lines. Not closely allied to any known species. Head, antennae, prothorax, scutellum, postscutellum, legs, and abdomen of a lively chestnut colour; meso- and metathorax, sides of pectus, and segments 2 and 3 of the abdomen black. The pro-thorax is indistinctly and narrowly bordered with yellowish; and the mouth-parts are more or less yellow in the male. The first segment of the abdomen is distinctly bordered behind with yellow, most broadly on the upper part of the sides. The thorax, scutellum, &c. are finely punctured ; and there are three very shallow longitudinal grooves on the mesothorax, and a more distinct groove in the middle of the metathorax. Wings smoky brown, with iridescent reflections ; nervures brown or reddish brown ; yellowish towards the base and along the costa and inner margin of the fore wings. PoMPILIJXE. 3. MYGNIMIA EXTRANEA, sp. n. Exp. al. 2 in. 1 line to 2 in. 6 lines ; long. corp. 1 in. to 1 in. 5 lines. PROC ZOOL. Soc-1881, No. XLII. 42 |