384 LÉPIDOPTÉROLOGIE COMPARÉE 



and, being regular, stand out more clearly, in spite of the pale 

 character of harrisoni ground colour. In practically ail spéci- 

 mens of denhami the second line and the subterminal band with 

 its su ff usions, are very clear, but in most spécimens of harrisoni, 

 only the second line is at ail continuously marked, the subter- 

 minal band being very weak and the suffusions obsolescent. As 

 in the forewings, the veins in (Icnhanii throughout are very clearly 

 outlined in black, but in harrisoni the definite outlining of tho 

 veins is restricted to the area beforc the second line. The only 

 other point of différence is m the thorax, in which harrisoni 

 approaches zonaria more closely than denhami does in the appea- 

 rance of the markings of the patagia. 



Wings expanse as in denhami. 



b) Females. In this harrisoni differs greatly from denhami 

 inasmuschas it does possess a female, and that a very curious 

 one, as one might expect, for the insect has to combine the normal 

 wing of hirtaria with the rudimentary one of zonaria. The wings 

 of zonaria Q in shape, are narrow, and short and pass to a some- 

 what rounded tip directly from the base, as the termen is sup- 

 pressed. Ail four wings are the same except that the length of 

 the forewings is 2 mm. and that of the hindwings 1,5 mm. 



The shape of harrisoni wings is generally that of the spécimen 

 figured on PI. CLXI, fig. 1574, but there is grea.t variation m 

 this respect. Frequently, the wings are narrower and more 

 pointed, and the wing outline passes directly from the apex to 

 the base with one bold curve. The costa then has a gentle convex 

 curve instead of a slight hollow near the tip. Rarely, in other 

 spécimens, the wings hâve an area one third of the normal but 

 the proportions remain the same. The hindwings may, inde- 

 pendent of the shape of the forewings, become long and narrow 

 while, on the contrary, they may assume the same shape as in 

 hirtaria, of course, on a smaller scale. It is noteworthy that in the 

 shorter-winged examples, the wings are more thickly haired and 

 the fringes become longer and more bristle-like. 



