246 GEOMETRIC. 



inwards on vein 1 ; an indistinct whitish submarginal sinuous line, 

 Hind wing whitish, with subbasal line and postmedial sinuous line 

 angled outwards on vein 4. 



The form porphyria has the thorax brown ; the wings much 

 browner, with hardly a trace of white areas and with indistinct 

 sinuous medial line. 



Hah. Japan ; N.W. Himalayas ; Khasis. Exp., <$ 66-74, $ 

 108 millim. 



3353. Biston cognataria, Guen. Phal. i, p. 208. 



Differs from regalis in being grey thickly irrorated with fuscous, 

 the vertex of head and collar whitish ; fore wing with the ante- 

 medial line more angled on median nervure ; the postmedial line 

 prominently angled between veins 4 and 6 ; the medial sinuous 

 line of both wings more prominent. 



Hob. N. America; ]S T .W. Himalayas. Exp., tf 36, 62 

 millim. 



B. (Eubyjodonta). Both wings with the outer margin crenulate and 

 more or less produced at vein 4. 



3354. Biston sinuata, n. sp. 



d . Pale brown, irrorated with fuscous ; collar fringed with 

 black : abdomen ringed with black. Fore wing with an obliquely 

 curved antemedial black line with a brown band inside it ; both 

 wings with indistinct medial line ; a postmedial black line with 

 two brown lines beyond it, excurved between veins 4 and 7 of fore 

 wing and angled at vein 6 of hind wing ; outer area reddish brown, 

 except at apex of fore wing. 



ffab. Sikhirn. Exp. 72 millim. Type in B.M. 



3355. Biston falcata, Warr. P. Z. S. 1893, p. 416. 



c? . White, irrorated with black spots ; head fulvous ; thorax 

 barred with black ; abdomen yellowish. Fore wing with sinuous 

 antemedial fulvous band ; both wings with similar submarginal 

 band and some large and small fulvous spots on margin. 



Bab. Sikhim. Exp. 62 millim. 



SECT. II. Proboscis more developed ; frons less hairy ; hind tibiae 

 with the first pair of spurs medial ; wings with the outer 

 margins non-crenulate. 



A. ( Amraica). Antenna; of male ivith very long uniseriate 

 pectinations. 



3356. Biston recursaria, Wlk. Cat. xxi, p. 374; C. $ S. no. 333o. 

 Boarmia ferrolavata, Wlk. Cat. xxvi, p. 1536 ; C. fy S. no. 332:1 

 r...:u-tnia solivagaria, Wlk. Cat. xxxv, p. 1586. 

 Aniphidasys auperans, Butl. III. Het. ii. p. 48, pi. 35, fig. 3. 

 Amraica fortissiina, Moore, Lep. Atk. p. 245 ; C. 8f S. no. 836i 



