( cxxv ) 



of the American species. The lamina, however, is broader in 

 proportion and the apex somewhat blunter. The base is less 

 rounded, and has a well-marked clear area. The fimbriae, 

 somewhat shorter than in G. driis'dla, are distinct ; the disc 

 moderate in size and cylindrical. 



The plumules of Phrissura lasti, which are numerous, are 

 much like those of Glutophrissa. The lamina is longer in 

 proportion than in G. saha, bearing in this respect a greater 

 resemblance to the American species. The disc, as in the forms 

 above described, is moderate in size and cylindrical. 



Phrissura sylvia has fairly numerous scent- scales. They are 

 not unlike those of P. lasti, but broader in proportion. The 

 fimbriae show a lyriform arrangement at the apex of the 

 lamina ; this is also visible in P. lasti, to some extent in 

 G. saha, and occasionally in G. drusilla. 



The scent-scales in Phrissura phaola and P. nagare are of a 

 somewhat different character from those in the rest of the 

 genus. In P. phaola they vary a little in breadth, but are 

 always slightly goblet-shaped ; with the base rounded, the 

 sides diverging slightly towards the distal aspect, and a well- 

 defined clear area at the base. The fimbriae are very short ; 

 the footstalk is usually bent ; the disc is large and oval, 

 showing often a distinct proximal aperture. 



Phrisswra nagare has plumules like the last, but generally 

 broader. The base of the lamina is less rounded and some- 

 what tapering ; the basal clear area is less well-defined. The 

 sides, as before, diverge distally ; the fimbriae are not quite 

 so short. The disc is large, and may be oval or spheroidal. 



Phrissura aegis from the Philippines presents us with a 

 scent-scale having a long, narrow lamina, with slight lateral 

 compression and rounded base. There is a well-defined clear 

 basal area ; the fimbriae are long, the disc small and oval. 

 The scale is not much like that of an African PJirissura, but 

 rather recalls that of a Tachyris of the hippo group. 



In Appias libythea the sides of the lamina are nearly parallel ; 

 the base almost squared, or with a slight indication of cornua. 

 The disc is oval, moderately large, and generally shows a very 

 distinct orifice, not always terminal. The lamina in Apjnas 

 zelmira is a little shorter and broader than in its congener. 



