ESF 105) 
XXIX. New South American Butterflies. By W. ¥F. H. 
RosEnBERG, F.Z.S., F.E.S., and G. Ta.sort, 
F.E.S. 
[Read December 3rd, 1913.] 
THE types of the species here described are in the collection 
of W. F. H. Rosenberg. 
PIERIDAE. 
Dismorphia orise denigrata, subsp. nov. 
Much lighter in colour than the typical form from Cayenne. The 
margin and black bands are narrower and the vitreous areas larger. 
This form is more common in collections than typical orise, and 
inhabits the Upper Amazons, Peru, Bolivia and Ecuador. 
ITHOMIIDAE. 
Aprotopos ceto cetoides, subsp. nov. 
Similar to ceto, Feld., but without the reddish-brown ground- 
colour of that species, the vitreous areas being tinged with yellowish- 
brown. 
3 upperside, fore-wing. Differs from cefo in the more broadly 
black apex and smaller apical spots. The distal edge of the spot 
in 6 is not level with that of the other spots as in ceto. The proximal 
edge of this band of spots is sharply defined and not invaded by 
black at vein 4, as in ceto. The space between the median and 
fifth apical spot is broader than it is in ceto. The distal edge of the 
cell-spot is straight and not rounded. The median spot is narrower 
distally owing to abbreviation of the lower part separated by vein 2. 
The streak bordering the median below the cell is faint or absent. 
On the hind-wing the spot outside the cell is smaller and more 
rounded proximally. The band separating this spot from the 
basal area is narrower, being narrowest at vein 3. 
Underside similar to the upper. 
A 9 in the British Museum from Colombia agrees with the above 
male in colour and in the absence of the streak below the median 
of the fore-wing. Agrees with ceto female in having less black 
except that the black distal band on the hind-wing is much wider. 
Type, a § from Pozuzo, E. Peru, 800 m. Length of 
fore-wing 40mm. 3 ¢ 4 from Pozuzo, E. Peru, 800 m. 
TRANS. ENT. SOC: LOND. 1913.—PaRTiv. (MAR. 1914) 
