A REVISION OF THE ORIENTAL HESPERIID^. 223 



PlRDANA. 

 Pirdana, Distant, Rhop. Mai. p. 376 (1886) ; Watson, P. Z. S. 1893, p. 116. Type hyela, Hewitson. 



Wings unspotted. Species plain brown above or with a blue, green, or purple shade 

 from the base of the wings outwards ; tornus of hind wing more or less broadly yellow. 

 Antennae more than half as long as costa ; club slender. Fore wins' with the termen 

 as long as or longer than the dorsum, at least in the male, the former straight from 

 the tornus to vein 5 ; vein 2 from the basal third of the lower edge of the cell, vein 5 

 nearer 4 than 6. Hind wing: termen distinctly produced at vein 1 b ; vein 2 from the 

 apical third of cell. Hind tibiae roughly scaled on the outer side, but not fringed with 

 long hairs. 



We distinguish the species known to us as follows : — 



1 (6). With a sex-mark on the fore wing above in the male; antennae above 



brown. 



2 (5). Sex-mark on upperside of fore wing in the male consisting of a raised 



seam on each side of the basal third of vein 2 and the middle third 

 of vein 1 a. Hind wing below purplish brown with green veins, or 

 washed with green. 



3 (4) . Hind wing below purplish brown, the veins broadly and the dorsum 



pale green hyela, Hew. 



4 (3) . Hind wing below purplish brown washed with green ; veins concolorous ; 



cells 1 a and 1 b purple, shot with green distanti, Stgr. 



5 (2). Sex-mark on the upperside of the fore wing in the male consisting of 



three oblong-oval patches of androconia, a large one near the base 

 of cell 2, and two others much smaller, placed one above the other 

 near the middle of cell 1 a. Hind wing below plain brown . . . celsina, Feld. 

 6(1). No sex-mark on fore wing above in the male ; antennae above in greater 



part white albicornis, n. sp. 



! PlRDANA HYELA. 



Hesperia hyela, Hewitson, Descr. Hesp. p. 23 (1867). 



Pirdana hyela, Distant, Rhop. Mai. p. 376, pi. xxxv. fig. 6, ? (1886). 



Pirdana rudolphii, Elwes & de Niceville, Jour. As. Soc. Beng. 1886, p. 438, pi. xx. fig. 6, £ . 



As the type specimen of P. rudolphii is now in the Calcutta Museum, we only know 

 it from the plate above referred to. The only difference between the figures of 

 rudolphii and hyela from Borneo is the smaller extent of yellow at the anal angle 

 in the former. 



Hab. Perak, Pulo Laut (Doherty) ; Tenasserim (Bingham) ; Java (fide Hew.) ; 

 Khasias (coll. Sivinhoe). 



2o 2 



