380 Wood-Mason & de Nicevllle — Oti the Bhopaloceroiis [No. 4, 



third taken in the Sikkim Tarai by Mr. Otto Moller on 14th September, 

 1881. 



B. septentrionum is nearly allied to B. suhditus, Moore (Proc. Zool. 

 ^^c. Lond., 1883, p. 634), but it differs therefrom in its considerably 

 larger size, in the spots on the upperside of the forewing being of a 

 brighter ochreous, in the shade of the ochreous of the underside gene- 

 rally, and in lacking the conspicuously broad very pale yellow discal streak 

 which extends from the base to near the outer margin of the hindwing 

 and forms so mark.ed a feature both in B. suhditus from the Nilgiri and 

 Pulni Hills and in B. vittatus (Felder) from Ceylon. 



204. ASTICTOPTERUS SUBFASCIATUS, PI. XVIII, FigS. 1, 1(X, <J . 

 A. suhfasciatus, Moore, Proc. Zool. Soc. Lond., 1878, p. 842. 

 A male and a female from forest near Silcuri, 6th June and 20th 

 July. The male of this species has a curious impressed elongated oval 

 brand on the forewing, placed so immediately behind as to touch the 

 median nervure, and extending for one-third of its length along the first 

 median nervule. This species probably has no real connection with the 

 genus Astiotopterus. 



205. ASTICTOPTEEUS BUTLERI. 



<y . Closely allied to A. xanites, Butler, from the Malay Peninsula, 

 Java, and Borneo. Upperside, both wings dark fuliginous-brown, 

 strongly suffused with purple and glossed with dark bronzy-brown 

 according to the play of light. Foreiving entirely lacking the broad 

 orange band so conspicuous in A. xanites. Underside, forewing paler 

 and less strongly suffused with purple, paling from the middle of the 

 interno-median area to the posterior margin. Hindwing plum- coloured, 

 with the anterior margin fringed at the base with black bristles forming 

 a tuft, which is lodged in, aud nipped by the lips of, an elongated 

 sac-like fold in the cell of the forewing. 



$ . Larger than the male. Upperside, forewing with an obsolete 

 oblique discal red band, which is sometimes quite absent, but distinct 

 traces of which are always to be seen on the underside, which is rather 

 lighter everywhere and less strongly suffused with purple than in the 

 male. The hindwing of course lacks the tuft of black bristles present 

 in the opposite sex. 



Expanse : cf» 1'^ 5 ?» ^'-^ inches. 



Three males and four females in forest near Silcuri, 8th to 19th July. 



A preliminary notice and figure of this species appeared in Journ. 

 A. S. B., vol. lii, pt. 2, p. 98, n. 260, pi. x, fig. 3, ^ (1883). It is by 



