TRIFIDJS. 95 



We have eleven species, most of which are easy of recogni- 

 tion : 



A. Fore wings dull brown with two very broad golden 



bands. P. chrysitis. 



A 2 . Fore wings obliquely and alternately striped with 



purplish-pink and olive-green = P. illustris. 



A 3 . Fore wings dark purple-brown with one gold spot. 



B. The gold spot large, rather squared, placed beyond the 



middle. P. chryson. 



B 2 . The gold spot rather pear-shaped, in the middle of the 



wing. P. bractea. 



A 4 . Fore wings rich chocolate, or light purple-brown. 



C. Fore wings almost suffused with pale gold, and having 



a brighter, doubly-ringed central spot. P. moneta. 

 C 2 . Three rich golden elongated spots on the chocolate 



surface. P.festueaz. 



C 3 . A central y-like golden mark, very often broken. 



D. A large squared chocolate cloud on the dorsal margin 

 includes the gold y. P. iota. 



D. The whole surface richly rippled with chocolate and 



golden purple. P. pulchrina. 



A 5 . Fore wings violet-grey, purple-grey, or greyish-brown, 

 with the central mark silvery. 



E. The colour purple-grey to grey-black, very smooth, the 



spot a very perfectly formed y. P. gamma. 



E 2 . The colour violet-grey to violet-black ; the spot U- 



shaped with a round spot beneath. P. interrogationis. 

 E 3 . The colour grey-brown or pale purplish-brown, dull, 



the spot an obscure y, abdomen with ochreous lateral 



tufts. P. ni. 



1. P. chryson, JSsp.j orichalcea, Sub., Stainton. — Ex- 

 panse If inch. Fore wings broad, pointed, rich dark purple- 

 brown with a large somewhat squared golden blotch beyond 

 the middle ; hind wings pale brown with darker nervures. 



Antennee of the male stout, simple, minutely ciliated, 



