32 THE ENTOMOLOGIST. 



Larva. — Length 7 lines, moderately stout. Head shining black, and 

 but little smaller than 2nd segment, the upper part of which segment is 

 also shining black. Ground colour whitish, with a broad dorsal and narrower 

 subdorsal stripe rosy brown. Several small black warts, from which short 

 black hairs are emitted, are scattered over the dorsal and subdorsal areas ; 

 these are rather larger on the 3rd segment. There is also a row of larger 

 black warts along the spiracle line. 



The larva feeds in flower-heads of Tussilago farfara during April 

 and May. 



Pupa. — Upper part like the larva in coloration, but paler, and not 

 hairy. Wing-cases light brown, more or less streaked with darker. May 

 bo found among seed-down, in heads of food-plant, in May. 



It will be observed that the description 1 have given of the 

 imago is not that of the ordinary form of P. trigonodactylus. 

 Again, compare my description of the larva with that given by 

 Mr. Peers (Entom. ii. 38), and it will be found that a very material 

 difference exists. Mr. Peers says of the larva he describes, " dorsal 

 line light brown; subdorsal line broader, lighter brown; head and 

 2nd segment fulvous." Here, then, is either discrepancy or descrip- 

 tions of the larvae of two very closely -allied species, sufficiently 

 distinct as larvse, but not easily separated as imagines. I have 

 no reason to doubt the accuracy of Mr. Peers's observations, as 

 recorded, more especially as all the imagines bred from my larvse 

 were of the same pale colour, and uniform in the character of the 

 apex of anterior wings, in both respects differing from the examples 

 of P. trigonodactylus which I had usually taken in the imago state 

 in other parts of England. 



I have before me just now my bred series, and a set of cap- 

 tured specimens from Kent and elsewhere, including one or two 

 taken in North Devon, quite a month after my last pupa had 

 disclosed its imago. The best comparison I can make between 

 the two sets is to say that the bred insects look bleached and 

 worn by the side of the captured specimens. 



Mr. Doubleday would appear to have had some doubt as to 

 whether P. gonodactyla, W. V., was synonymous with the P. tri- 

 gonodactylus of Haworth ; at least I take this to be the meaning 

 of the ? after P. gonodactyla in his synonymic list. 



I believe my North Devon insects to be identical with the 

 P. gonodactyla of the Continent, and I think it may be found 

 that we have two species in our cabinets under the name of 



