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Show 54 LORD WALSINGHAM ON [Jan. 19, 4. Revision of the West-Indian Micro-Lepidoptera, with Descriptions of n e w Species. By the Rt. H o n . Lord WALSINGHAM, M.A., LL.D., F.R.S. [Received November 5, 1896.] About two years ago I received a communication from Baron W . von Hedemann asking m e to examine and determine a collection of Micro-Lepidoptera which he had made in the Danish West Indies. Although at first very unwilling to undertake the task, anticipating, not without reason, that there would be a large amount of new material, and that it would involve a very difficult study of the synonymy of described species aud of general classification, I felt that such a study must necessarily be very instructive, and that the opportunity should not be lost to enlarge my limited acquaintance with the West-Indian fauna. Moreover, as the Danish Islands lie to the north of those which supplied the material for m y previous paper [Proc. Zool. Soc. Lond. 1891, pp. 492-549 (1892)], they promised to afford some connecting links with the rich fauna of North America, already somewhat known to me. As to the instruction to be derived, and as to the difficulty of the work undertaken, m y calculations were not at fault; moreover, the rediscovery of Clemens's genus Cgcloplasis, with some other decidedly North-American forms, has been of special interest in connexion with the subject of distribution. The amount of material to be dealt with was largely increased bv the reception of a further collection from the same islands made by Mr. F. Gudmann. These, together with the Micros collected by Mr. H . H . Smith in Grenada (from the Godman and Salvin collection), and others received from Dr. Rendall, M r . T. D. A. Cockerell, Mr. W . Schaus, Mr. F. W . Urich, and the late Monsieur E. Ragonot, form the materials of this paper. It is in fact a second edition of the former one, bringing the West-Indian catalogue of Micro-Lepidoptera up to date, on the lines of the new system of classification put forward by Mr. E. Meyrick in his ' Handbook of British Lepidoptera,' which marks an epoch in the study of these small and often obscure forms. W h e n the paper was commenced I was working upon the old lines, with such modifications only as had become obviouslv necessary as the general study of the subject has advanced; but the publication of Mr. Meyrick's book supplied a want, and his system seemed to be so near at least to that which I was already working up to by an independent course of study and reasoning, that no effort was required to induce m e to accept in the main his sequence of the different families and genera; this has been adopted so far as possible, with the one notable exception of the position and value of the Tortrlclclce, which cannot, in m y opinion be rightly separated from the Tineina, and should take a place |