4l6 LÉPIDOPTÉROLOGIE COMPARÉE 



appears and overpovvers the weak spot of pomonaria. Similarly 

 the influence of sonaria now stroiigly affects the longitudinal 

 stripes, that is to say, instead of being at the best, indistinct and 

 only clearly marked after a yellow bar, they are as clear or almost 

 so, as those of zonaria. A very curious development is seen in the 

 two mediodorsal stripes, which expand to enclose the yellow bars. 

 The other stripes, of course, are weaker than thèse. 



The collar is very well marked, and is very like that of pomo- 

 naria, as are also the yellow spots before the anal plate. The 

 anal plate itself, is the same as in the larvas of the two parents 

 in shape, etc., but is heavily white spotted, as in zonaria. 



The spiracular stripe is broad and yellow and is very like 

 that of zonaria, but is not so broad. In fact, it is most like that 

 of denhami, although the spotting mentioned in the description 

 of that hybrid is weaker, and the lined appearance, when viewed 

 under a lens, is more confused. 



The spiracles are black and are situated just above the spira- 

 cular line. 



Beneath, the larva is of a blackish colour, interrupted only by 

 the pale yellow spot of the spiracular stripe, as in hirtaria, and by 

 the medioventral stripes which, owing to the différence in cha- 

 racter between those of the two parents, are rather indistinct. They 

 form a séries of " beads " in appearance, rather than the séries of 

 " barrels " seen in zonaria. 



The legs and prolegs are blackish but at the base of the legs 

 can be observed the white spot common to zonaria and pomonaria 

 in this instar. 



3rd INSTAR. 



Length at the end 11,7 mm. 



Breadth of head 0,7 mm. 



Greatest breadth 1,2 mm. 



Head. The head is black, marbled with white to a much 

 greater extent than in pomonaria, but the shape shows more traces 



