176 MESSRS. RILEY AND GODFREY ON 



nearly equal in length to the terminal spike of the uncus ; in 

 mimetica, on the other hand, they are decided^ more delicate and 

 only about 2 ( 3rds the length of the terminal spike. In each species 

 also the clasp ends in a spike-like process which in melema, in 

 proportion, is quite twice the size of that in mimetica, and also less 

 clearly differentiated from the broad upward -curving anteterminal 

 part of the clasp from which it arises. This latter part 

 as well exhibits a difference in that it is broader and stumpier in 

 mimetica, evenly tapering in me 1 emu. As a corollary to this it 

 seems reasonable to suppose that typical binghami and darlisa are 

 similarly distinct species; and, occuring together as they undoubtedly 

 do, that they stand in the same relationship to each other in Burma 

 as do mimetica and melema in Siam. 



8. Cirrochroa chione, sp. now 

 (Plate V, fig. 3.) 

 6 Upperzide, forewing. — Basal two-fifths brown, bounded 

 by a slightly darker irregular line running from near costa, 2 mm. 

 beyond cell-apex, to just beyond centre of vein 1, gently angled in 

 area 2 (in another specimen the course of this line is rather more 

 even). Costal area of same colour as base, the colour extending 

 beyond edge of basal brown are.x, a darker shade across end of cell. 

 Apex very broadly, and hind-margin (towards anal angle more 

 narrowly) black, the inner edge of this black border curving roughly 

 parallel to .the outer edge of the basal brown area and just reaching 

 to middle of costa. The intermediate discal area is golden-brown in 

 the form of a wide even band cut off" from the costa only by the 

 narrow strip of apical black which reaches to middle of the costa. 

 There are traces of. an antemarginal series of darker spots in areas 

 lrt and 2, and of a submarginal line in area la. Hindwing. — Of the 

 same colour as the base of forewing, rather brighter towards 

 hind-margin. There is a subquadrate white spot centrally in area 

 7, inwardly edged with black, from the outer edge of which runs a 

 very fine direct irregular black line finishing at vein la about 

 5 mm. above margin. Between this and the marginal black border, 

 which throughout is about 1.5 mm. wide, are, firstly, a series of six 



JOURN. NAT. HIST. SOC. SIAM. 



