LÉPIDOPTÉROLOGIE COMPAREE 433 



of the spiracular stripe, nevertheless reproduces the characters 

 of both parents to a very remarkable extent. Possibly none of 

 the hybrids hitherto described hâve showed in such a perfect 

 manner the détails of the markings of both parents. 



Head. The head, although marked very much as in helenœ, is 

 somewhat smaller but, otherwisc, there is but little différence. 



Body. The body is coloured just the same in the two forms, 

 and is of a clear cool grey. The longitudinal stripes, while in 

 character very like zonaria, are placed just as they are in pomo- 

 naria. They are rather narrow; the filling is a bright yellow 

 and is much more evenly distributed along the stripes than in 

 helenœ. On account of the fineness of the stripes, the medio- 

 dorsal area becomes broader but there is little tendency for this 

 space to be united to the other parts of the ground colour owing 

 to the stripes breaking at the end of a segment as they do in 

 pomonaria. 



The subdorsal stripe is so reduced that the filling in is barely 

 discernible. The lower edging is almost, but not quite, obsolète 

 and the upper one, very irregular. Thèse two stripes are more 

 confused than those of -pomonaria on the last abdominal seg- 

 ments. The supraspiracular stripe is very similar to that of 

 pomonaria and is fairly well indicated on ail of the segments, 

 although it may be interrupted. The whole of the stripes are 

 reasonably regular on the thorax. The yellow bars are présent 

 and, although somewhat weakencd, are very clear. They appear 

 more as bar-like interruptions of the dorsal stripes than as part 

 of it as those of helenœ do. As in pomonaria, thèse bars, in 

 many cases, are reproduced on the metathorax and on the 6th 

 and 7th abdominal segments. There may even be produced 

 beneath thèse yellow bars, on ail the segments bearing them a 

 weak appearance of the whiter pomonaria bars. Ail of the 

 dorsal suffusions seen in pomonaria are clearly indicated. 



The collar is very bright in colour and is clearer than in 

 helenœ. The anal plate, whilst narrower and less rounded termi- 



28 



