( cxxxi ) 



in llyposcrltia, of great brightness by reflected, combined with 

 opacity by transmitted light. It is occasionally notched, or 

 otherwise irregular in outline. On the hindwing the lamina 

 is usually longer. 



The scent-scales in Catofhaga are not widely different from 

 those in Ilyposcritia. A specimen of Catojihaija paidina from 

 Ceylon has the sides of the lamina parallel, the base slightly 

 rounded, the disc moderate in size and oval. In a specimen 

 from Bengal the lamina is broader, the sides slightly con- 

 vergent towards the apex, the disc small and elongated. 

 Gatophaga agave shows on the forewing a rather small plume- 

 scale ; the sides of the lamina are laterally compressed, the 

 base rounded, the disc small and oval. On the hindwing the 

 scent-scales ai'e similar in shape, but longer. 



In Catophaga melania the latei-al compi'ession is better 

 marked, and the base shows signs of cornuation. The disc, as 

 before, is small and rather narrowly oval. 



Udaiana cynis has a scent-scale which is very much like 

 that of a Cato])haga or a Hyposcritia. The lamina shows a 

 lateral compression, the proximal being broader than the distal 

 dilatation. The ba<e is rounded, the disc rather small, circular 

 or oval. 



We now come to the well-marked genus Ilnphina, Oriental 

 and Australian in distribution, which offers in many of its 

 members so curious a parallelism in aspect with forms of the 

 genus Delias. A compai'ison of the scent-scales shows that the 

 resemblances between the genera are more than superficial. 

 The scent-scales in Hupldna at once recall those of Delias, 

 from which they can scarcely be distinguished except by the 

 comparative smallness of their accessory discs. Their likeness 

 also to the pilialoe group of Fieris is remarkable. A character- 

 istic feature of the special scales in Hujjhina is their great 

 relative abundance. In this respect likewise they resemble 

 both Delias and the phaloe section of Pieris. 



Ilaphina hoisduvaliana presents a scale with lamina of the 

 elongated pear-shape so frequently met with in the two genera 

 just mentioned. The base is rounded ; the disc small, circular 

 or triangular. On the hindwing the special scales are 

 similar, but the lamina is broader at the base and a little 



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