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Show 56 MR. A. G. BUTLER ON LEPIDOPTERA [Jan. 1/? 12. UNIO ^EGYPTIACUS, Caillaud. Hab. Various parts of the Nile; Albert Nyanza (Baker). 13. UNIO CAILLAUDI, Ferussac Hub. Same as preceding. 14. UNIO BAKERI. Cnio bakeri, H. Adams, Proc. Zool. Soc. 1866, p. 376. Hab. Albert Nyanza (Baker and Emin). Only one fresh and two dead valves without the epidermis were obtained by Sir Samuel Bak. r. Five odd valves, which have been presented by Mr. Waller to the Mi^eum and are in good condition, show that this species, like most others of the genus, is very variable in form, and that the extent and coarseness of the zigzag wrinkling of the surface is very inconstant. A number of so-called species of Unio described by Bourguignatl from the Victoria Nyanza approach very closely to U. bakeri, and indeed I should be surprised if several of them on comparison might not satisfactorily be classed with it. 15. UNIO ACUMINATUS. Unio acuminatus, H. Adams, Proc. Zool. Soc. 1866, p. 376. The two valves collected by Sir S. Baker are all that is known of this species. It is of a more slender form than the preceding, and has down the posterior dor-al area two subparallel shallow grooves or impressed ravs with a raised space between them. This feature is represented in U. bakeri by two divergent colour-rays in the same part, but rather more remote from one another. 5. O n the Lepidoptera received from Dr. E m i n Pasha. By A R T H U R G. BUTLER, F.L.S., F.Z.S., &c [Eeceived December 5, 1887.] The Lepidoptera received from Dr. Emin Pasha are referable to no less than 156 species, of which thirteen Butterflies and two Moths are new to science ; one or two of these are extremely variable and, had the extremes only been obtained, might fairly have been regarded as distinct species. The collection contains a combination of South-western and North-eastern forms, by far the greater number, especially of those obtained at Wadelai in 1887, being identical with Abyssinian species; a few more southerly forms, identical with species from Kilma-njaro, crop up here and there, such as Junonia infracta, Teracolus aurigineus, and others. 1 Moll. fluy. du Nyanza Oukerewe (Victoria Nyanza), Paris, 1883, pp. 3-15. |
