( exi ) 
developed patches and streaks of thickened scaling on the 
wings. When a scraping from these streaks is examined 
microscopically, it is seen to consist almost entirely of peculi- 
arly-shaped scent-scales, somewhat resembling those of the 
genera Huphina and Delias, and quite distinct from the scent- 
scales of the other three groups of Pieris. There are specific 
differences between these scent-scales which are often of 
service in the determination of specimens. I propose to offer 
a few remarks on some members of this buniae group, and 
especially on some captures lately made in Venezuela by 
Dr. G. B. Longstaff. 
About P. buniae, Hiibn., there is little doubt or difficulty. 
It is a large form from Brazil, white with a black apex and 
posterior margin, more or less indented internally, on the 
fore-wing; a dark spot, sometimes double, at the end of the 
cell on the under surface of the hind-wing; and a black 
discoidal spot, larger in the female, on both surfaces of the 
fore-wing. The hind-wing in the female usually bears dark 
marginal spots. The scent-scales are long, narrow and 
tapering, with rounded base and small accessory disc. They 
vary slightly in size and’shape. Those from the hind-wing 
are shorter and broader than those from the fore-wing. The 
species is well represented in the Burchell Collection at Oxford, 
and both sexes are adequately figured in Seitz’s ‘‘ Macro- 
lepidoptera.”’ 
P. ausia was described by Boisduval from specimens 
captured in the environs of Pernambuco, 7. e. the coast region 
of the extreme east of the South American Continent. The 
male and female from the Hope Collection agree well with 
Boisduval’s description. The extent of the apical dark area 
of the fore-wing is in both sexes less than in P. buniae, and 
the female has a dark curved band passing from the costa 
over the distal end of the discoidal cell. Seitz’s account of 
P. ausia differs in some respects from the above and from 
Boisduval’s description. He does not figure the species. 
The scent-scales closely resemble those of P. buniae, but are 
on an average slightly narrower. 
P. phaloe, Godt., is widely distributed in the north-east of 
S. America, including the island of Trinidad. Its locality 
