4l8 LÉPIDOPTÉROLOGIE COAIPARÉE 



4th INSTAR. 



Length at the end 2,3 cm. 



Breadth of head 1,7 mm. 



Greatest breadth 2,6 mm. 



Head. The head is now a délicate pearly grey in colour and 

 bears a few scattered black dots, emitting the primary setas 

 which are brownish as in pomonaria. Although smalier, it is very 

 like the head of zonaria. The mouth parts are slightly suffused 

 with blackish; the antennae are pale at the base, but the club, 

 bearing a long sensory bristle, is black. 



Body. The ground colour is grey, not the délicate smooth 

 grey of zonaria, nor the deader grey of pomonaria, but between 

 the two. The longitudinal stripes, which are fairly regular on 

 the thorax, are now more like those of pomonaria but, dominated 

 by zonaria, the edging of the subdorsal and supra spiracular ones 

 is degraded and dotted. The filling in of the mediodorsal stripes 

 is yellow as in zonaria. 



The yellow bars now become weaker, and instcad of being 

 obsolète, as in zonaria, or white, linear and ridged like those of 

 pomonaria, they are yellowish and heart-shaped with the point 

 turncd outward. 



As is the case in many zonaria larva?, the space between the 

 upper edging of the supraspiracular stripe and that of the spi- 

 racular stripe, is suffused with black, curiously interrupted by 

 two lines of detached white dots, one representing the fillmg in 

 of the supraspiracular stripe and the other the ground colour 

 above the spiracular line. The black suffusion before the yellow 

 pomonaria spot on the spiracular line, which is so conspicuous in 

 pomonaria, is présent, but is fainter; the spiracles may be 

 surrounded by a yellow ring but this varies even with the diffé- 

 rent spiracles of the same spécimen. The spiracles are not so 

 round as those of zonaria. 



The black suffusion found before the white bars in pomonaria^ 



