352 PTKROPHOKUS AOANTHODACTYLU.S. 



being less conspicuous in P. acantlwdactylus ; and the 

 head being yellowish-brown marked with black, in 

 place of the " very dark sienna-brown, almost black," 

 in P. cosmodactylus. (George T. Porritt, 8th October, 

 1886; B.M.M., November, 1886, XXIII, 132.) 



Pterofbokus punctidactylus. 

 Plate CLXIII, fig, 6. 



I have to thank most sincerely Mr. Eustace P. 

 Bankes, of Corfe Castle, and Mr. Nelson M. Richard- 

 son, of Llangennech, for the trouble they have taken 

 in helping me to an acauaintance with the larva of 

 Pterophorus cosmodactylas H.-S. = P. punctidactylus 

 Steph. 



On the 8th of August, 1884, I received from Mr. 

 Bankes about a score of larvae which he had collected 

 from Stachys sylvatica as ' Pterophorus acantho- 

 dactylus, 9 and I made careful notes on them for that 

 species. The first two imagos which emerged — on 

 the 17th and 19th of August respectively — were P. 

 ucanthodactylus, but, to my astonishment, the next 

 specimen, on the 21st, and every one following, were 

 P. cosmodactylus ! I had described two distinct 

 varieties of the larva, but as they had so much in 

 common, I had never suspected that they might 

 belong to different species ; and being also quite 

 ignorant as to which larvae had produced P. acantho- 

 dactylus, and which P. cosmodactylus, it became neces- 

 sary to wait for further specimens before anything 

 satisfactory could be ascertained. 



In the middle of September, Mr. Richardson for- 

 warded to me alive two fine females of P. cosmodac- 

 tylus, which he had beaten out of furze bushes at 

 Aberayron, in Cardiganshire, with the information 

 that he almost always took the ? in the autumn in 

 such circumstances, and he had no doubt that they 

 hibernated in the bushes, and deposited their eggs in 



