ON NEW AND LITTLE-KNOWN BUTTERFLIES. 377 



40. IDMON UNICOLOR, Distant, PI. Q, Fig. 53, $. 



Baoris unicolor, Distant, Rhop. Malay., p. 381, n. 5, pi. xxxv, fig. 11, female (188G). 



Habitat : Malacca {Distant) ; Perak. 



Expanse : $, 1-35 ; 9, 1*35 to 1*45 inches. 



Description : " Upperside and underside, both wings unicolorous 

 rufous-brown. Body dark brown. Legs pale brown." 



" This obscure, and to me unique, Baoris is contained in the 

 collection of Dr. Staudinger, to whom I am indebted for the opportunity 

 of figuring and describing it." (Distant, I.e.) 



Mr. Distant's choice of a name for this species was a little unfortunate, 

 as in 1883 Mr. Moore had used the same for an extreme form of the 

 very variable Baoris oceia, Hewitson. My identification of the species 

 is also a little dubious ; all that Mr. Distant says about it is given 

 above, and if my identification of the unique specimen he figured and 

 described is correct, the sex of which is not even stated, it has nothing 

 in common with the genus Baoris, Moore, as that genus comes into 

 Section B, while my specimens come into Section A, of Captain 

 Watson's subfamily Pamphilince. I possess a single male and two 

 females all from Perak, of 7. unicolor, and find by comparing the female 

 examples with Mn Distant's figure of the species that they agree very 

 closely; 



Genus ITYS, nov. 



Male. Forewing, triangular, rather lengthened; costa very straight; 

 apex acute ; outer margin convex ; inner angle rather acute ; inner 

 margin straight, considerably longer than the outer margin ; costal 

 nervure terminating on the costa well before the apex of the discoidal 

 cell ; subcostal nervules arising at decreasing distances apart ; discoidal 

 cell long, more than half, less than two-thirds, the length of the wing^ 

 narrow ; upper disco-cellular nervule stout, short, strongly outwardly 

 oblique ; middle and lower disco-cellulars sub-erect (slightly inwardly 

 oblique), straight, thin, the middle rather longer than the lower ; 

 second median nervule arising well before the lower end of the cell ; 

 first median arising a little nearer to the lower end of the cell than 

 to the base of the wing ; submedian nervure straight ; a long sexual 

 tuft of hairs attached to the inner margin of the wing towards the base 



5 



