339 



defined, but it exists as a comparatively narrow border to the 

 white patch in both fore- and hindwing. The scales composing 

 the white patch are in each case of a specialised kind. In the 

 hindwing they are elongate oval, much like those of A. virgo. 

 In the forewing the proximal part of the patch is entirely com- 

 posed of scales of this character, but distally these become 

 mingled with other scales of the same general type as the club- 

 shaped scales in A. virgo, but shorter, less gradually tapering, 

 and with the distal margin simply rounded and not bifid. As in 

 A. virgo, scales of this latter kind are continued over the surface 

 of the wing to some distance bev'ond the edge of the scent- 

 patch. In both species they appear to be absent from the 

 hindwing, where the scales of the white patch are of one uni- 

 form appearance. The scales peculiar to the scent-patch are 

 in D. praxinoe very heavily loaded with white pigment ; appar- 

 ently much more so than in .-1. virgo. In both species the club- 

 shaped scales are comparatively devoid of pigment, and show 

 a coarsely-meshed chitinous reticulum. 



In Dismorphia fortúnala Luc, the conspicuous white patch 

 on the undersurface of the forewing in the male occurs chiefiy 

 on the inner side of the median, and is traversed by the three 

 branches of that vein. It consists almost entirely of a dense 

 mass of long, cur\-ing hairs closely matted together, and inter- 

 mixed with a few oval scales of a type intermediate between 

 the ordinary form and the full}' developed hair. These hairs 

 are absent from tlir liiiuKving, but tlu' wliitish, opaque area of 

 the costal portion upper surface shows a pavement-like assem- 

 blage of elongated oval scales, somewhat similar to those of 

 the scent-patches in A. virgo. 



In Dismorphia pallidula Butl. & Druce the scent-patches 

 are well defined. The}' form oval marks of a brown colour 

 in the usual situation on the fore- and hindwing. The scales 

 composing tliem are very closely packed, set up on the wing 

 at a considerable angle, and well furnished with pigment. It 

 is noticeable that though they are all of the elongated oval 

 type, those of the forewing are mostly somewhat narrowed 

 towards the proximal extremity, while those of the hindwing 

 have the sides nearly parallel. 



In no species of Dismorphia or Acmcptcron, so far as I am 



