MO L. de Niceville & Dr. L. Martin —Butterflies of Sumatra . [No. 3, 
682. Pirdana hyela, Hewitson. 
Hagen. Originally described from Java, from whence I possess 
both sexes. Found also at Sungei Ujong in the Malay Peninsula. In 
this species the underside of both wings is striped with green along the 
veins, in P. pavona , de Niceville, the underside is not thus marked. We 
possess only four specimens taken in Bekantsclian in July and August. 
683. Pirdana pavona, de Niceville, n. sp. 
Habitat : Perak in the Malay Peninsula ; N.-E. Sumatra ; Java. 
Expanse: cf, 1'85 to 2'25; 9 , 1*90 to 2’30 inches. 
Description: Male. Upperside, both wings glossy hair-brown. 
Forewing unmarked, the cilia brown. Hindwing unmarked, the cilia 
yellow, narrow anteriorly, wide posteriorly, and the yellow colour 
extending on to the wing” membrane broadly at the anal angle. Under¬ 
side, both wings very dark verditer green. Forewing with the inner 
margin broadly as far as the median nervure and second median nervule 
dark ochreous, merging anteriorly into dark brown; the cilia pale 
brown. Hindwing unmarked, except that the anal angle is somewhat 
broadly brown anterior to the broad outer yellow area, which latter, 
together with the cilia, are as on the upperside. Body above dark 
brown. Palpi and body beneath with a small anal tuft yellow. Female. 
Upperside, both wings glossy liair-brown. Forewing with the basal half 
glossed with deep shining steel bluish-green. Hindwing with the 
basal two-thirds glossed with the same colour ; the yellow colour at the 
anal angle twice as broad as in the male. Underside, both icings with 
the green ground-colour of a much paler shade than in the male. 
Hindicing with no brown area at the anal angle, the angle itself even 
more broadly yellow than on the upperside. 
Allied to Hesperia ismene , Felder, from Celebes; Hesperia hyela , 
Hewitson, from the Malay Peninsula, Java and Sumatra; and Pirdana 
rudolphii, Elwes and de Niceville, from Sikhim, the Kha.si Hills and 
Tavoy in Lower Burma, but differing therefrom in the ground-colour of 
the underside being uniformly green, instead of dark brown with the 
green colour arranged in stripes along the veins. 
Described from one male from Perak, a single male from the 
Battak mountains of N.-E. Sumatra taken in January, and a male and 
two females (the types) from Java, received without precise locality 
from Herr H. Fruhstorfer. 
684. Plastingia callineura, Felder. 
Originally described from Java. Hesperia latoia, Hewitson, des¬ 
cribed from Singapore, is a synonym, as is also I believe P. margherita , 
