1907.] ON THE MICROLEPIDOPTERA OF TENERIFE. 911 This mascle in the Pelobatidae has retained its embryonic rela-tions to the larynx, and has only in a very slight degree acquired the secondary relation to the thyrohyal. Precisely the same thing is figured by Ridewood for Xenopics and Fipa. The long ■extension backwards of the cesophageal muscle, universally charac-teristic of the Pelobatidpe (as far as our information goes), and its relation to the pelvis is possibly to be conipared with the also very lai'gely developed and apparently corresponding muscle in the Aa'iossa. 5. Microlepidoptera of Tenerife. By the Eight Hon. Lord Walsingham, M.A., LL.D., F.H.S., F.Z.S. [Received November 12, 1907.] (Plates LI-LIU. and Text-figures 241-243.) In the Annalen of the K.-k. Naturhistorische Hofmuseum (Vienna) Professor Dr. H. Rebel has published a series of very interesting and instructive papers on the Lepidopterous Fauna of the Canary Islands ; I desire now to record the result of a short visit to Tenerife, during which I was able to devote a good deal of attention to the Microlepidoptera of the island : a large proportion of these having been bred, it is satisfactory to be able to add some information upon their food-plants and larval habits. In the last of the papers above referred to, published in Vienna in 1906, Prof. Rebel gives a revised sj^stematic cata-logue and enumerates 87 species of Alicrolepidoptera (10 of which are merely indicated without special nanies under the genera to which they belong), 4 out of the remaining 77 not being recorded from Tenerife; we have therefore a residue of 73 species, to which the additions following in this paper may now be made, raising the total to 173 species (of which 70 are here described) distri-buted among 84 genera (seven of which are new). It is proposed to add some critical notes upon Rebel's List, where these seem to be required thi'ough the acquisition of additional information : the species not met with are merely inserted to facilitate reference. I desire to express my very grateful thanks to Dr. George Perez, and to Dr. 0. Burchard, for the great assistance they gave me in naming many plants which I should otherwise have been at a loss to determine ; as also to the Rev. A. E. Eaton for numerous additions to my cabinet included in this paper. I had moreover the great advantage of being allov/ed to examine Mr. W. W. White's collection at Guimar, enabling me more fully to appreciate the value of Dr. Rebel's work ; nor can I forget that that author had already most kindly dealt with some material originally submitted to him from my collection. Without the encouragement offered by the complete and systematic manner in
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