( cxxiv ) 



lamina is much broader. The fimbriae are rather long and 

 distinct ; the footstalk is straight, terminating in a cylindrical 

 disc with a minute proximal orifice. The base of the lamina 

 is rounded ; almost semicircular. The scent-scales in this 

 specimen are not numerous. 



We now come to the large group of Pierines in which the 

 anal valves of the male are furnished with a conspicuous tuft 

 of hairs. This peculiarity was first bi'ought into notice by 

 Mr. A. R. Wallace, who founded upon it his genus Tachyris. 

 At the present time it has been found convenient to sub- 

 divide Wallace's genus ; and the generic or subgeneric names 

 Glutophrissa, Phrissvra, Appias, Saletara, Hyjyosa'itia, and 

 Catophaya, in addition to Tachyris, are all in use. It may be 

 doubted whether each of these sections, though the arrange- 

 ment is serviceable in practice, forms a perfectly natural 

 group ; I much question, for example, whether there is any 

 good distinction between Glutop)hrissa and many species of 

 Phrissura ; while two or three forms of the latter genus appear 

 to stand apart from the rest, Tachyris again, even as at 

 present restricted, is not homogeneous; the ceJeMina group 

 being somewhat sharply marked off from that assemblage of 

 species that centres round Tachyris hippo. 



The genus or subgenus Ghdophrissa is common to Africa 

 and South America with the West Indies ; Phrissura is 

 African and Oriental ; the remaining genera are Oriental and 

 Australian. Glutophrissa in America consists of several sub- 

 species or local races which may all be ranked under the 

 general head of G. drusilla. Similarly, the African species, 

 Glutophrissa saha, occurs under somewhat different forms in 

 different parts of the Ethiopian province, including INIadagascar. 



In Glutophrissa drusilla from Guatemala the scent-scales are 

 numerous. The sides of the lamina are parallel ; the apex 

 moderately sharp ; the base rounded at the cornei's. The 

 fimbriae are distinct ; the footstalk often bent ; the disc some- 

 what elongated and furnished with an orifice. In a specimen 

 from Brazil, the lamina is generally a little longer in propor- 

 tion to its breadth than in the individual just de.scribed from 

 Central America. 



In Glutophrissa saha, the scent-scales arc mucli like those 



