CNEPHASIDJE—SCIAPHILA. 257 



B-. Ground colour grey or slate colour. S. colquhounanu. 



A". Fore wings elongated and narrow, costa slightly arched, 

 markings confused. 



C. Male soft pale slate-grej"; female white. S. conspcr^ima. 

 C". Sexes alike, grey, markings black and strong. 



S. communiiiiii. 

 C^. Sexes alike, pale grey, markings slender, obscure. 



)S'. suhjcdanu. 

 A''. Fore wing elongated, broad, robust ; female sometimes 

 large. »S'. chrysanthcana. 



A*. Fore wings broad with much arched costa, very silky. 



»S. incanrinc (siiUKiini). 

 A?. Fore wings elongated, somewhat ovate. S. pascindui. 



A**. Fore wings elongated, broad, costa gently arched. 



D. Colour white with black markings. >S'. octomuculuna. 

 D^. Colour grey with dark grey markings. S. virgaureana. 

 AJ. Fore wings short, rather broad ; sexes similar. 



S. nbrasana. 

 A*. Fore wings short, ovate ; sexes slightly differing. 



S. imhilana. 



1. S. bellana, Curt.; penziana, Hub. — Expanse | to 

 I inch (18-22 mm.). Fore wings long, white, with oblique 

 jagged black stripes. 



Antennae whitish-brown ; jialpi, head, and thorax white ; 

 abdomen yellowish-white. Fore wings elongated, rather 

 narrow ; costa nearly straight, without a fold ; apex rounded : 

 snow white dusted with black and the markings black, near 

 the base is a nearly perpendicnlar transverse stripe which 

 throws out a strong elbow with a projecting point ; central 

 baud very oblique, narrow, irregular, and deeply notched, 

 often broken and partially obliterated ; apical area spotted 

 on and belovv the costa with black so as to form a partial 

 third oblique stripe ; cilia smoky-white. Hind wings ample 

 clear white. Female similar. 



VOL. X. R 



