CHOEODIVA. BISTON. 245 



SECT. III. Hind wing with the outer margin evenly curved. 



3351. Chorodna erebusaria, Wlk. Cat. xxi, p. 314; Butl. III. Het. vi, 



pi. 115, fig. 9 ; C. 8f 8. no. 3122. 



3 . 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 stria3 above middle of outer margin and a pale patch below 

 middle. 



Hob. Sikhim ; Shillong. Exp. 88 millim. 



Genus BISTON. 



Biston, Leach, Edinb. Encycl. ix, p. 134 (1815). 



Eubyja, Hiibn. Verz. p. 318 (? 1818). 



Lycia, Hiibn. Verz. p. 319. 



Amphidasis, Treitschke, Eur. Schmett. vi, i, p. 229 (1827). 



Buzura, Wlk. Cat. xxvi, p. 1531 (1862). 



Cusiala, Moore, Lep. Ceyl. iii, p. 407 (1887). 



Amraica, Moore, Lep. Atk. p. 245 (1888). 



Eubyjodonta, Warr. P. Z. S. 1893, p. 416. 



Blepharoctenia, Warr. M,v. Zool. p. 428 (1894). 



Type, B. stratiaria, Hiibn., from Europe. 



lianye. Nearctic and Palaarctic regions; throughout India,. 

 Ceylon, and Burma ; Java. 



Palpi short and hairy ; thorax stout and clothed with thick pile ; 

 legs hairy ; hind tibia3 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 ; antennae of male 

 bipectinated to near apex with stiff branches ; hind tibiae with 

 the 1st pair of spurs near the extremity. 



A. (Biston). Both wings luith the outer margins non-crenulate. 



3352. Biston regalis, Moore, Lep. Atk. p. 234 ; C. 8> S. no. 3253. 

 Amphidasys porphyria, Butl. III. Bet. vii, p. 102, pi. 136, 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. Pore wing brown, irrorated with black ; the basal, 

 medial, and apical areas whitish ; an autemedial black line slightly 

 angled in cell and bent inwards below vein 2 ; a postmedial line 

 excurved from veins 7 to 4, incurved from veins 4 to 2, and angled 



