( 97 ) VI. On some neglected points in the structure of the pupte of Heterocerous Lepidoptera, and their pro-bable value in classification ; with some associated observations on larval prolegs. By Dr. Thomas Algernon Chapman, M.D., F.E.S. [Read February 22ncl, 1893.J Desultory and unrecorded observations of many years on pupae were recently thrown into order and invested with a meaning by a study of the earher stages of the Adelidce, and I have since taken more accurate notes of the structure of the pupae of many species. Such accu-rate record, however, is a tedious and laborious process, and to go over the whole ground, or even a large fraction of it, will involve many years' work, and require the combined energies of a number of observers. I have therefore thought it better to bring the subject forward in its present imperfect state, in order to direct atten-tion to it, rather than wait an indefinite time for the comparatively small additions I should myself be able to make; and, whilst apologising for the want of a larger mass of material, I may say that the indefinite and unnoted work of many years enables me to handle the material I have with more confidence than its own amount might appear to justify. Descriptions of pupae are often very minute in various particulars, but it is curious that they are usually silent on the points that I desire to draw attention to. One consequence of this is, that almost every fact that I here report has had to be observed by myself, with no assist-ance from any published description. The reference to the pupa of Nascia cilialis, described by Mr. W. H. B. Fletcher, is, indeed, almost the only exception, though I am indebted to various correspondents for materials for observation. This is one excuse for calling attention to the subject as early as possible. It is very desirable that these omissions may in the future be supplied, and TRANS. ENT. 800. LOND. 1893. — PARTI. (MARCH.) H
VI. On some neglected points in the structure of the pupæ of Heterocerous Lepidoptera, and their probable value in classification; with some associated observations on larval prolegs
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