338 



over the wing than in A. nemesis, but the boundaries of both 

 area and patch, especially of the hindwing, are less well defined 

 than in that species. This is partly due to the fact that the 

 scales of both patch and area are in the hindwing of nearly the 

 same whitish tint ; while in the forewing the scales of the oval 

 patch are of two kinds, one of which is not confined to the patch 

 itself, but extends beyond the borders of the patch over nearly 

 the whole of that part of the silky area which lies between the 

 first median and the upper radial vein. A result of this arrange- 

 ment is that the distal border of the patch is somewhat less 

 sharply defined than in A . nemesis, and that on a naked-eye 

 view a kind of cloudiness, due to the presence of these widely- 

 dispersed scales, pervades the part of the silky area that has 

 been named. The scales which are common to both patch and 

 silky area may be described as elongate cordate, or club- 

 shaped, tapering regularly towards a narrow proximal extremity, 

 and with the distal border slightly bifid. These are thickly 

 interspersed among the scales proper to the region, which in 

 the scent-patch are elongated elliptical, about five times as long 

 as broad, and smaller in all dimensions than in .4. nemesis. 

 The scales of the hindwing patch are similar, but less elongated 

 and broader in proportion. Those of the silky areas are much 

 like those in A. nemesis, but have the sides more nearh^ parallel. 

 They are larger on the hindwing than on the forewing. The 

 sockets of both kinds of specialised scales are easily distinguish- 

 able microscopically from each other and from those of the 

 ordinary scales clothing the other surface — lower or upper as 

 the case ma}' be. In a denuded wing-membrane the sockets 

 of the ordinary scales appear as simple cups ; those of the 

 specialised scales are ill-defined and somewhat opaque, the 

 latter character seeming to be due to an abundant wrinkling of 

 the wing-membrane in their immediate vicinity. Those of the 

 scales peculiar to the scent-patch are distinguishable by their 

 superior size. Both kinds of specialised scales are altogether 

 absent in the female. 



The male of Dismorphia praxinoe Doubl, has two large 

 white patches, one occupying about two-thirds of the lower 

 surface of the forewing, the other nearly half of the upper surface 

 of the hindwing. The silky area in this species is not well 



