494 L. de Niceville & Dr. L. Martin— Butterflies of Sumatra. [No. 3, 
536. Udaiana cynis, Hewitson. 
Pieris cynis, Hewitson, Ex. Butt., vol. iii, pi. Pieris viii, fig. 54, male (1866). 
Udaiana pryeri, Distant, Kliop. Malay., p. 301 (1885). 
Udaiana androides, Hagen, Iris, vol. vii, p. 32 (1894). 
Hewitsoa. Wallace. Butler. Kirby. Distant. Hagen as cynis 
and androides. Originally described from Sumatra. I bave a large 
series of both sexes of this species in my collection from three 
distinct localities, the Malay Peninsula, Sumatra and Borneo. In 
all of these they present exactly similar and parallel variations. The 
males have the underside of the hindwing (1) entirely pure white, 
(2) with the base sprinkled with greenish-fuscous scales, (3) with the 
base heavily marked with a broad black band, beyond which, crossing 
the disc of the wing but not reaching the costa or abdominal margin, is 
a fuscous rather broad line or fascia, and every gradation exists be¬ 
tween these three forms. The latter form is the 27. pryeri of Distant, 
described from North Borneo. The females vary greatly in the extent 
of the development of the fuscous coloration on the upperside of both 
wings, in the palest form, which has been named Z7. androides by Hagen, 
this is hardly more extensive than in the male, while every gradation 
exists until the darkest form figured by Distant in Rhop. Malay., 
pi. xxvi, fig. 6, is reached. In the case of 27. cynis, TJ. pryeri , and 
27. androides I am sure we have to do with one protean species only. In 
this Dr. Martin entirely agrees with me for the reason that he has 
caught all three forms at the same time in the forest near Selesseh. 
27. cynis is found exclusively in the forest and throughout the year, but 
only at low elevations not higher than Namoe Oekor. The males some¬ 
times come to wet spots on roads together with Catopsilia catilla , 
Cramer, and species of Terias ; the females are captured on the green 
flowers of a low creeper in the forest. 27. cynis never occurs in the 
black-soil-forests of Deli, but as soon as the red-soil-forests of Langkat 
and Serdang are entered there it appears at once. 
537. Terias harina, Horsfield. 
Hagen. Wallace. This is the true Terias of the forest, where it is 
found somewhat rarely frequenting flowers together with species of 
Zemeros and females of Lycsenidse. It is found throughout our area, 
with perhaps the exception of the Central Plateau, and flies throughout 
the year. 
538. Terias libythea, Fabricius. 
Snellen as brigitta. Hagen as brigitta, var. drona, and drona. The 
“ Papilio ” brigitta of Cramer was described from “ La Cote de GuirnSe.” 
