PTERINS. 
189 
Pry-season form (Plate 539, fig. 2, 2a, g, 2b, c, $). 
Prioncris Watsoni , Hewitson, Trans. Ent. Soc. Lond. 1868, p. 100, $ . Butler, Proc. Zool. Soc. 1872, 
p. 28. Moore, Proc. Zool. Soc. 1878, p. 839. Adamson, List Burmese Butt. 1897, p. 41. 
Fruhstorfer, Berl. Ent. Zeit. 1899, p. 110. 
Prioneris Seta , Wallace, Trans. Ent. Soc. Lond. 1867, p. 384, $ . 
Male and Female. Smaller in size than the wet-season foim. Male. Upper- 
side similar. Forewing differs in the black apical portions being narrower, and the 
cell area showing less indications of the dark markings of the underside. Findwing 
with a very slender black marginal border only, or, in some, this border is very 
slightly dentate at the end of the veins ; the yellow colour of the underside being 
indicated by a delicate flush within the cell and outer interspaces. Underside. Fore¬ 
wing similar to the upperside, except that'the dark portion is purplish-brown or pale 
purplish-black, including the upper half of the cell area ; the spots at the apex of 
the wing are smaller and yellow, or sometimes obsolescent. Findwing with the 
basal dark portions purplish-brown, the middle of the cell, the basal spot, and outer 
interspaces being chrome-yellow with white borders, the discal and marginal spots 
being also confluent within each interspace. 
Female. Upperside white, approximating to the male. Fore-wing with the cell 
area and outer veins broadly black bordered ; the cell area with black longitudinal 
streaks and anteriorly-enclosed white spots. Findwing with a narrow black marginal 
dentated band, and a lower discal broad diffused clirome-yellov r patch. Underside. 
Forewing as in the male, except that the cell area is black and enclosing white basal 
streaks and anterior spots. Findwing with the basal dark portions and marginal 
border purple-brown, with chrome-yellow markings, as in the male. 
Expanse, S 2J to 3, ? 3 to 3J inches. 
Larva.—U nknown. 
Habitat. —Sikkim; Bhotan; Assam; Burma; Upper Tenasserim ; Shan 
States. 
Distribution.' —Mr. H. J. Elwes records “the males not uncommon in Sikkim, 
up to 4,000 or 5,000 feet elevation, throughout the season ; the female rarer. I 
have also a male from Buxa, Bhotan” {l.c. 410). Mr. L. de ATiceville says it is “a 
common species in Sikkim at elevations below 5,000 feet all through the warm 
weather. The females are very rare. It is strongly affected by the seasons ; the 
dry-season form found early in the year has been named Watsoni ” (lx. 66). Col. C. 
Swinhoe records it as being “ common in the Khasia Hills ” (l.c. 310). Mr. W. 
Rothschild possesses specimens of both sexes from “ Sadarghat, Assam.” Cob 
C. H. E. Adamson took “ three specimens of Thestylis , in March and April, on the 
Lampha Choung, near Taoo, Middle Tenasserim, and two of Watsoni in February at 
Thounggya Sekkan ” (List Burm. Butt. 1897, 41). Capt. E. Y. Watson obtained “ a 
