New Butterflies and a Moth from Biak. 183 



marginal row of square -shaped grey-white spots in cellules lc-6. 

 Inner margin faintly scaled with grey- white anteriorly and with 

 dark yellow at the base. 



$. Wings roimded. Upperside black; basal area greyish-white 

 with some yellow scaling, rendered dark by the underlying ground- 

 colour. Forewing with a submarginal row of 6 white spots which 

 are larger towards apex. Hindwing with a similar row of smaller 

 spots of nearly equal size. Inner margin grey-white. 



Underside black. Basal three-quarters of cell to below median 

 yellow. Submarginal spots as above but larger and better defined. 

 A distinct spot touching margin, on first submedian fold. Hind- 

 wing with costa yellow at base and yellow scaling extending to 

 inner margin. A submarginal row of 7 well-defined white spots 

 much larger than those above; those in 6 and 7 tinged with 

 yellow. 



Length of forewing : (J 35*5 mm., ? 32-5 mm. 



A series. 



10. Delias biaka, sp. nov. 

 (Plate XXII, figs. 3, ^, 4, ?.) 



Allied to dorimene. Cram. (J. Upperside. Forewing paler than 

 in the allied species, costa and apex black, outer margin narrowly 

 so to below vein 2. Apical black proximally bordered by 4 well- 

 defined white apical spots, and a dot in 2 and 3 close to margin. 

 Upper edge of cell streaked with grey-white. Hindwing creamy- 

 white with a black outer marginal band which is paler distally and 

 broader than in dorimene ; the veins crossing it are black from their 

 ends to a little proximal of the band. Four marginal white dots, 

 the two first in 5 and 4 the largest. A greyish suffusion at the 

 base. 



Underside of forewing with basal half suffused with grey. Apical 

 spots larger and better defined than above. Hindwing with yellow 

 ground-colour paler than in dorimene. Areas Ic, 2, and 3 shaded 

 with orange. Black marginal band as above and veins only black 

 within it. A marginal row of 4 elongate white spots separated by 

 the veins. The ground-colour invades the band in cellule 5. 



$. Upperside black, greyish at the base. Forewing with 4 white 

 apical spots and a dot before the first. Hindwing with 4 rounded 

 white submarginal spots in 2-5, and an indistinct one in 6. 



Underside ground-colour black. Forewing with a submarginal 

 row of 7 white spots from costa to outer angle, the second and third 

 the largest, the last an indistinct dot. Basal half greyish-white. 

 Hindwing with costa, base, and inner margin yellow. A sub- 



