308 
Mr. G. F. Hampson's 
to inner margin near base ; a postmedial oblique fine brown line ; 
a subapical black spot and another on inner margin near outer 
angle. Hindwing with speck in cell ; fine oblique medial brown 
line ; two obscure yellowish lunulate spots with fuscous inner 
edge between veins 2 and 4 above a waved fuscous line from anal 
angle to vein 5 ; both wings with traces of brown marginal line. 
Underside with traces of curved dark medial line and submarginal 
specks to forewiug; hindwing with a dark spot on costa towards apex. 
Hob. Donaut Eange, Tenasserim (De Niceville). 
Ex/p. 44 mm. Type in B. M. 
Genus Ptyorhyncbta, nov. 
Type. P. argyresthis, Hmpsn. 
$ . Palpi with the 2nd joint straight oblique and fringed with 
hair above, the 3rd upturned with a very large tuft on inner side ; 
a slight frontal tuft ; antennai nearly simple ; tibiae hairy. Fore- 
wing with the costa much arched ; the outer margin excised below 
apex, produced to a hook at vein 4, then excised to outer angle. 
Hindwing with the anal angle truncate ; vein 5 from lower angle 
of cell. 
Ptyorhyncha argyresthis , n. sp. 
5 deep chestnut. Fore wing thickly covered with fine strige ; 
f f j fh. Ptyorhyncha argyresthis, $ , y. 
the basal two-thirds with a silvery sheen except the costal area 
