PIEBIN'JE. 
187 
concave near the base. Hindwing broadly oval; exterior margin uneven; basal 
area from the subcostal to internal vein very hairy ; precostal vein curved; costal 
vein arched ; first subcostal emitted at one-lialf before end of the cell; discocellulars 
very long and outwardly oblique, upper slightly concave, radial from their angle; 
cell extending to two-thirds length of the wing; middle median at nearly one-fourtli 
and lower at one-half before end of the cell; submedian vein straight, internal 
recurved. Body stout; abdomen compactly scaled above, fmely hairy basally, 
beneath finely hairy from base to claspers; thorax and head hairy; palpi long, 
very laxly hairy beneath ; legs long; antennae long, with a gradually thickened 
club. 
Type. —P. Thestylis. 
Mimioby. —Mr. A. R. Wallace writes, “The species of Prioneris , in several cases, 
seem to mimic those of the genus Thyca. The male of P. Thestylis , on the underside, 
most strikingly imitates Thyca Belladonna , while the female resembles it on the 
upperside as well. P. Sita is a perfect representation of T. Eucharis. The species of 
Thyca are very abundant and are weak, slow-flying insects, while the species of 
Prioneris that mimic them are rare, and the pairs which resemble each other inhabit 
the same district” ( l.c . 383). Mr. L. de ISficeville says that the P. Sita of Ceylon 
“ is a splendid mimic in both sexes, of the highly protected Delias Eucharis , but its 
more rapid and somewhat darting flight makes it easily distinguishable when on the 
wing” (Journ. As. Soc. Bengal, 1899, 210). 
The species of this genus, according to the examinations made by Mr. J. Watson 
( l c. 1867, 259) do not possess androconial scales. 
PRIOHERIS THESTYLIS. 
Wet-season form (Plate 538, fig. 1, la, $, lb, c, d, e, g; 539, 1, la, 9 ). 
Pieris Thestylis , Doubleday, Gray’s Zool. Misc. p. 76, (1842); icl. Gen. D. Lep. i p. 44 , pi. 6 , 
%• 2, c? (1847). Moore, Catal. Lep. Mus. E. I. Company, 1. p. 78 (1857); id. Proe. Zool. Soc. 
Lond. 1865, p. 759. 
Prioneris Thestylis , Wallace, Trans. Ent, Soc. Lond. 1867, p. 384, ?. Butler, Cistula Entom. i. 
p. 39 (1870) ; id. Proc. Zool. Soc. 1872, p. 27. Staudinger and Shatz, Exot, Schmett. ii. p. 64, 
pi. 6 (1886). Elvves, Trans. Ent. Soc. Lond. 1888, p. 410, ^ ? • Swinhoe, id. l.c. 1893, p. 310 
de Niceville, Sikkim Gaz. 1894, p. 166. Ivirby, Allen’s Hat. Libr. Butt. ii. p. 171 (1896). 
Adamson, List Bunn. Butt. p. 41 (1897). Watson, Journ. Bombay Nat. Hist. Soc. 1»97, p. 669. 
Fruhstorfer, Berl. Ent. Zeit. 1899, p. 107. 
Pieris Seta, Moore, Catal. Lep. Mus. E. I. Company, i. p. 78, g (1857) ; id. Proc. Zool. Soc. Lond. 
1857, p. 102, pi. 44, fig. 3, g . Fruhstorfer, l.c. p. 108 (1899). 
Imago. —Male. Upperside greyish-white. Forewing with the median vein and 
its branches basally black-lined ; the costal border black, the black curving obliquely 
outward across end of the cell, thence broadly bordering the outer veins to the 
1 b 2 
