CHORODNA.—BISTON. 245 
Szor. III. Hind wing with the outer margin evenly curved. 
3351. Chorodna erebusaria, Wk. Cat. xxi, p. 814; Butl. Ill. Het. vi, 
pl. 115, fig. 9; C § S. no. 3122. 
$. Whitish, suffused with pale brown and irrorated with black. 
Fore wing with a line from middle of costa angled at each angle of 
cell, then oblique to near base of inner margin; a large chocolate 
reniform spot beyond discocellulars extending to the costa ; a post- 
medial double line highly excurved below costa and incurved below 
middle ; the area between the medial and postmedial lines whiter ; 
a pale patch on outer area below middle. Hind wing whiter, with 
a blackish spot at end of cell; a postmedial series of specks; two 
black striz above middle of outer margin and a pale patch below 
middle. 
Hab. Sikhim; Shillong. Zep. 88 millim. 
Genus BISTON. 
Biston, Leach, Edinb. Encycl. ix, p. 134 (1815). 
Eubyja, Hiibn. Verz. p. 318 (? 1818). 
Lycia, Hiibn. Verz. p. 319. 
Amphidasis, Zreitschke, Eur. Schmett. vi, i, p. 229 (1827). 
Buzura, Wilk. Cat. xxvi, p. 1531 (1862). 
Cusiala, Moore, Lep. Ceyl. iii, p. 407 (1887). 
Amraica, Moore, Lep. Atk. p. 245 (1888). 
Kubyjodonta, Warr. P. Z. S. 1893, p. 416. 
Blepharoctenia, Warr. Nev. Zool. p. 428 (1894). 
Type, B. stratiaria, Hiibn., from Europe. 
Range. Nearctic and Palearctic regions; throughout India, 
Ceylon, and Burma; Java. 
Palpi short and hairy ; thorax stout and clothed with thick pile ; 
legs hairy; hind tihiz not dilated and with the spurs slight. Fore 
wing with the apex rounded; the outer margin oblique; vein 3 
from near angle of cell; 7, 8,9 stalked from near upper angle; 
10 and 11 stalked, 10 often connected with 8 and 9. Hind wing 
with the cell long ; vein 3 from the angle. 
Sect. I. Proboscis weak; frons densely hairy; antenne of male 
bipectinated to near apex with stiff branches ; hind tibiz with 
the 1st pair of spurs near the extremity. 
A. (Biston). Both wings with the outer margins non-crenulate. 
3352. Biston regalis, Moore, Lep. Atk. p. 234; C. & 8. no. 3253. 
Amphidasys porphyria, Buti. Ill, Het. vii, p. 102, pl. 186, fig. 1. 
Head and thorax irrorated with brown and black ; palpi black ; 
abdomen brown, irrorated with black and white, and with white 
spots on vertex. Fore wing brown, irrorated with black ; the basal, 
medial, and apical areas whitish ; an antemedial black line shghtly 
angled in cell and bent inwards below vein 2; a postmedial line 
excurved from yeins 7 to 4, incurved from veins 4 to 2, and angled 
