130 [June, 



Tortrix burrow, with irilken galleries, and nut in the plant tissue in an 

 interior burrow. 



I am not quite clear how to specify the difference, as the larva 

 makes a burrow right into the flower liead, but what I seem to realize 

 as the difference is that the Tortrix burrow is anywhere, vight into the 

 stem rarely, by preference between two opposed outer surfaces, some- 

 times almost outside, but always with silken protections of various 

 sorts. He correctly says the larva leaves the plant to pupate, he 

 describes the silk as brownish {'' bncndtre''), it is really rather pale. 

 The great hiatus, liowever, that 1 find between Milliere and myself, 

 is that he says they make their cocoon " ef se metamorpliosent tres 

 prompt em ent.'''' " Uetat de chrysalide dure de cinq a six semaims^ 

 Now I find that they do not change to pupa for three or four months 

 and that then the pupal stage only lasts less than three or four 

 weeks. Unfortunately Milliere gives no dates beyond that his visit 

 to Hyeres was in April. As his paper is two years later he probably 

 trusted too much to memory. 



The imago is described by Milliere (Annales Soc. Ent. Fr., 1857, 

 p. 803). He defines the colour as straw-yellow, the base slightly 

 smoky. He notes the silky lustre which is so pronounced, and 

 describes the discal spot as inclined to be divided, and notes a variety 

 in which it had an extension iu the direction of the anal angle. He 

 says that he reared at Lyons from the pupae he took home nearly 

 fifty imagines, so that it is astonishing that he says no more as to 

 variation. My specimens, fifty-six in number, present a good deal of 

 variation. In the first place they divide themselves sharply in two 

 sets, one of a yellow and the other of a leaden-grey colour. These 

 number respective 34 yellow and 22 leaden. In each set there are 

 one or two making some appi'oach to the other, but there is a definite 

 gap, so that none of these ^'wa^^-iutermediate forms are otherwise 

 than definitely belonging to one or other set. There are none that 

 are intermediate in the strict sense of being as much one as the 

 other. 



Plate IV. 



To deal first with the yellow ones. The ground colour varies, some are a very 

 pale straw, most are of a rich creamy-straw, whilst several are rather orange, one 

 quite a pinky-orange. The discal spot varies much, in no instance is a specimen 

 absolutely .without it, but one, and another is very close to it, has it so minute, that 

 if it were in a series of spotless specimens it is doubtful if its possession of the spot 

 would be detected. In more than half the specimens the spot is a definite small 

 rounded dot, from the evanescent form just referred to up to a size nearly that of a 

 full stop on this page. 



