' Lepidoptera from Dutch Neio Guinea. 225 



Hob. Wandammen Mtns., 3000-6000 feet, Nov., 2 ^ S- 

 We place this provisionally in Acerhas. The fore wing 

 has vein 2 from near the base, 3^ 4, and 5 all near together. 



BiAKA, gen. nov. 



Allied to Pirdana, Dist. Antennae about three-fourtlis 

 lengtli of fore wing. Fore loing with vein 5 from below 

 middle of discocellular, 3 close to 4 near angle of cell, 2 from 

 below middle of cell ; upper discocellular obsolescent, farther 

 from 10 than in Pirdana. Hind icing with vein 5 from 

 below n)iddle of discocellular, its proximal half obsolescent, 

 4 from the angle, 3 from just below the angle, 2 opposite 6 

 and farther from 3 than in Pirdana. 



Type, albidiscus, J. & T. 



Biaka albidiscus, sp. n. 



? . Upperside black-brown with a strong purple sheen. 

 Fore wing with a pale discal suffusion in areas Ih, 1 c, 2, and 

 3, formed by a reduction of scales ; some yellowish-brown 

 hair below cell and on inner margin. Hind loing with some 

 yellowish-brown hair in cell and in 1 c, and at the bases of 2, 

 3, and 4 ; a pale postcellular suffusion formed by reduced 

 scaling. 



Underside bronzy green. F'ore wing with a small white 

 discal patch formed of three spots in lb,lc, and 2 -, basal 

 and median area bluish purple. Hind loing with a large 

 bluish-white discal patch, extending from base along lower 

 half of cell, anteriorly to vein 6 and posteriorly to the inner 

 margin, its distal edge curved parallel to the outer margin. 



Antennae black, club with white scaling below. Head and 

 palpi black-brown mixed with yellow, tirst and second palpal 

 segments yellow at the side ; thorax black-brown clothed 

 with yellowish-brown hair; abdomen black-brown, with some 

 greyish-brown hair on basal segment, laterally and ventrally 

 with segments edged with white; legs black-brown on out- 

 side, ochreous on inside, femora whitish on inside. 



Length of fore wing 23 mm. 



Hah. Biak, Schouten Islands, June, 1 specimen. 



We are indebted to Ool. C. Swinhoe for kindly giving us 

 his opinion on this very interesting species. 



MiMENE, nom. nov. 

 Mimas, de Niceville, Journ, Bomb. Nat. Hist. Soc. vol.ix. 



