of Lepidoptera Heterocera from Japan. 309 
245. 
Lycia betularia. 
Geometra betularia, Linn., Syst. Nat., x, p. 521 (1758); 
Staud., Cat. Lep. pal., p. 336 (1901). 
Amphidasis doubledayaria (ab.), Millére, Icones, ii, p. 228, 
pl. Ixxv, fig. 7 (1864), and ii, p. 117, pl. in, fig. 1 (1869). 
Amphydasis cognataria (v. et ab. ?), Guen., 1, p. 208 (1857) ; 
Pack., Geom., 413. 
Biston betularia, ab. nigra, Heyl. Tijdschr., xiii, p. 155, 
pl. vi, fig. 3 (1870). 
Biston betularius, var. fumosarius, Alph., Rom. sur Lép., 
ix, p. 140 (1897). 
Biston robustum, var. parva, Leech, Ann. and Mag. Nat. 
Hist. (6), xix, p. 323 (1897). 
Eubyjodonta concinna (v. et ab.?), Warr., Nov. Zool., vi, 
p: 50 (1899). 
Betularva has not been recorded from Japan by Leech, 
but is recorded by Staudinger. Leech, however, describes 
Biston robustum, var. parva, from China, which in the 
National Collection is placed in the series of cognataria, 
Guen. Cognataria from North America is considered by 
Staudinger to be a form of betularia. 
One male specimen of var. parva from Junsai Numa, 
province of Oshima, Yezo, July, 1902. Leech’s f type is 
from Pu-tsu-fong, W. China. 
Local distribution. YEZO; Honpo, Oiwake (Pryer). 
General distribution. KUROPE; N. AMERICA (cognataria) ; 
ARMENIA; W. TURKESTAN; W.and E. SIBERIA; CENTRAL 
and W. CHINA; JAPAN. 
Collection number, 474. 
246. 
Lycia robustum. 
Liston robustwm, Butler, Ann. and Mag. Nat. Hist. (5), iv, 
p. 871 (1879) ; Leech, Ann. and Mag. Nat. Hist. (6), 
XIX, p.\322 (1897). \. 
Hubyja robustum, ab. albicollis, Warr. Nov. Zool., viii, 
p99 (11901). 
A series of fifteen males and two females, the specimens 
measuring in expanse from 50 mm. f to 72'mm. @, all 
taken in the neighbourhood of Tokyo from March 19 
