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, Rhop. Malay., p. 301 (1885). 

 Udaiana androides, Hagen, Iris, vol. vii, p. 32 (1894). 



Hewitson. Wallace. Butler. Kirby. Distant. Hagen as cynis 

 and androides. Originally described from Sumatra. I have 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 TJ. pryeri of Distant, 

 described from North Boimeo. The females vary greatly in the extent 

 of the development of the fuscous coloration on the npperside of both 

 wrings, in the palest form, which has been named TJ. 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 TJ. cynis, TJ. pryeri, and 

 TJ. 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. 

 TJ. 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. TJ. 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 haeina, 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 libtthea, Fabricius. 



Snellen as brigitta. Hagen as brigitta, var. drona, and drona. The 

 "Papilio" brigitta of Cramer was described from " La Cote de Gruinde." 



