C 345 ) 



Underside yellowish ochreons, dark leaden grej' towards the hindmargins. 



Face and jjalpi, tips of patagia, metathorax and abdomen black-brown; shoulders 

 and patagia rufous ochreons ; vertex and antennae snow-white ; abdomen beneath 

 and legs ochreons ; forelegs in front brown-black. 



Expanse of wings : 19 mm. 



1 ?. 



The whole surface of the wings is somewhat glossy, and the dark shades in 

 certain lights have a plumbeous reflection. 



4. Phazaca erosioides ^Vlk. 



In Nov. ZooL. iii. ]). 278, I described an Epiplema undalata from Fergusson 

 Island, the specimen being a ? , remarking that it was much like Walker's Bornean 

 species Phazaca erosioides, except that this had an almost white hind wing. Among 

 the Epipleminae lately received from A. S. Meek collected on the Upper Aroa 

 River, British New Guinea, I find 2 ? ? of /?. undalata and 1 c? of Phazaca 

 erosioides, the latter a very strongly marked dark example ; and there can be small 

 doubt that, different as the sexes appear, they yet belong to one and the same 

 species. In neuration Phazaca agrees with Epiplema, vein 5 of the forewing 

 rising from the upper end of the cell at the same point as the stalk of G and 7, and 

 veins 10 and 11 both rising from the cell ; but the S to a certain extent simulates 

 the cJ(? of Dirades, the hindwing being rounded, with a small insignificant tooth 

 at vein 7 only, and the space between veins 1 and 2 devoid of colour and pattern, 

 though without any pencil of hairs ; the- ? ¥ likewise have only a slight projection 

 at veins 4 and 7. In both sexes the apex of forewing is rounded, and the 

 hindmargin nearly straight, while their style and pattern of markings is strongly 

 suggestive of Dirades. The S antennae have closely placed clavate teeth. The 

 ? ? have been redescribed by Swinhoe as Epiplema kohistaria from Port Blair, 

 Andaman Islands, cf. Ann. Mag. X. II. (7). ii. p. 307 (1900), though by a mis2)rint 

 they are recorded as S $. The full synonymy will be as follows : — 



Phazaca erosioides Wlk., xxvii. p. 21 (cJ) (1863). 



Epiplema iindidata Warr., Nov. Zool. iii. p. 278 (?) (1896). 



Epiplema hohi.staria Swinh., I.e. (1900). 



Pterotosoma gen. no v. 



The S is like Epiplema in the neuration and general shape of forewing ; the 

 hindmargin quite as long as the inner margin, slightly protuberant in middle and 

 faintly indented beyond cell ; but the hindwings agree with the S of Dirades in 

 neuration and in the possession of an inner marginal fold and pencil of hairs ; the 

 inner margin is shortened, and the hindmargin irregularly crenulate throughout, with 

 a more prominent tooth at vein 7, as in Monobolodes. The pencil of hairs rises 

 from the extreme base of wing, and is as long and conspicuous as in the 6 of D. onusta 

 Warr. The main characteristic is an appendage of rough scales enveloi)ing the 

 basal segments of the abdomen beneath, and produced on each side in the form of 

 a tuft of hairs reaching nearly to apex ; the costa of hindwing is evenly curved 

 throughout, and the iimer margin of forewing straight. 



Type : Pterotosoma bilineata spec. uov. 



