( Ixxi ) 



The Cocoon of Dicranura vinula. — Dr. Chapman ex- 

 hibited some cocoons of Dicranura vinula that happened to 

 show much more plainly than is usually the case the different 

 and thinner texture where the moth is to emerge. In de- 

 scribing them he observed that Mr. Latter, Ent. Trans., 1895, 

 p. 399, says : " If a cocoon is examined from the inner side 

 while held towards the light, it will at once be seen that the 

 walls are not of uniform thickness, but that thinner patches 

 occur here and there. I have examined over a hundred 

 cocoons in this way and invariably found one of these thinner 

 areas at the anterior end opposite the head of the pupa." 

 As viewed from the outside the thin portion of the cocoon 

 is seldom very evident. Of those exhibited, six, made on 

 the inner surface of the cork, show these thin places most 

 obviously as darker patches — darker owing to having less of 

 the cork material used in them — and these correspond in form 

 and position to the portion of cocoon that the imago makes 

 use of for emergence. Two cocoons on the outer surface of 

 the cork show similar patches, but they are not seen till 

 looked for. Other cocoons made by the same lot of larvae 

 are equally different, only those on the inner surface of the 

 cork showing with such marked distinctness the thin places. 

 There seem to be no thin places at any other part of these 

 cocoons. As I have never noted these patches before to be 

 so evident, it seems that this particular cork surface leads to 

 the structure being so visibly differentiated." 



The Generic Name Tinea. — Mr. Stanley Edwards 

 asked the following questions : — ■ 



" Is the President aware that in the Collections at South 

 Kensington the generic name Tinea of Linnaeus is employed 

 for two different genera in two different families of the 

 Lepidoptera ? " 



" What steps does he propose to take as to this second 

 usage in a new and unfamiliar sense of an ancient and well- 

 known name whose application has been undoubted for 

 generations ? " 



The President, Mr. Bethune-Baker and Mr. Neave 

 spoke on the subject, and eventually it was resolved, on the 

 motion of Mr. Bethune-Baker, seconded by Mr. Durrant, 



