28 
LEPIDOPTERA IN DIG A. 
China and Japan Species. 
Colias maxima (Gonepteryx maxima, Butler, Ann. Nat. Hist. 1885, p. 407. 
Pryer, Rhop. Niplion, p. 7, pi. 2, fig. 5 (1886). G. Rhamni, var. Leech, Butt. China 
and Japan, p. 439, pi. 35, fig. 4 c?? (1893). Habitat . W. and E. China; Korea; 
Japan. 
Colias acuminata (Gonepteryx acuminata, Felder, Wien. Ent. Monat. yi. p. 23 
(1862). Pryer, Rhop. Niphon, p. 7, pi. 2, fig. 6 (1886). Leech, Butt. China, &c., 
p. 443 (1893). 
Colias Amintha (Gonepteryx Amintha, Blanchard, Comp. Rend. 1871, p. 810). 
Habitat . Moupin. 
Colias Alvinda (Gonepteryx Alvinda, Blanchard, lx . p. 810. Habitat . 
Moupin. 
Genus DERCAS. 
Pereas , Doubleday, Gen. D. Lep. i. p. 70 (1847). Moore, Catal. Lep. Mus. E. I. Company, i. p. 59 
(1857). Butler, Cistula Ent. i. p, 54 (1870). Distant, Kliop. Malayana, pp. 287,308 (1885). 
Leech, Butt, of China, Japan, &c. p. 445 (1893). Kirby, Allan’s Nat. Libr. Butt. ii. p. 224 
(1896). de Niecville, Ann. Nat. Hist. 1898, p. 78). 
Male. Forewing subtriangular, short, very broad ; costa very much arched 
from the base, apex with an acute projected point—more prolonged and acute in 
the female; outer margin very slightly oblique and dentated below the apex, 
posterior margin slightly curved from the base and thence almost straight to the 
angle ; cell short, extending to less than half the wing, broad ; costal vein reaching 
to nearly middle of margin ; first subcostal branch emitted at one-fourth, and 
second immediately before the end of the cell, fourth from below the third at half its 
length and ending before the apex, fifth (or upper radial) at one-third beyond the 
cell; upper discocellular short, lower long, each concave, angled above the middle, 
the lower radial from the angle; middle median near end of the cell. Binding short, 
very broad, quadrate; costa broadly lobate at the base, obliquely-convex outward, 
apex obliquely angled, exterior margin broadly produced and angled at end of upper 
median veinlet, its upper and lower edge almost straight, anal angle pointed, both 
angles being more produced in the female ; cell short ; precostal vein bent inward 
at about its middle ; costal vein rather short; first subcostal branch from near upper 
end of the cell; discocellulars very oblique, the upper short, lower long and concave 
at its upper end, the radial from the angle ; middle median from near end of the 
cell; submedian vein straight, ending at anal angle ; internal vein recurved. Body 
stout; thorax above clothed with fine silky hairs; palpi short, compressed, com- 
