174 MESSRS. RILEY AND GODFREY ON 



towards costa ; between this white band and the two red-brown 

 ocelli (of which that in area 5 is almost obsolete) is a diffuse band of 

 same colour as the base of the wing ; beyond this the general 

 colouration is pale buffy, the upperside markings faintly showing 

 through, darker towards margin. In the hindwing the ground- 

 colour is more uniform, the same shade as base of forewing, the 

 transverse white band and the area immediately external to it 

 almost completely suffused with blackish, the distal half of wing 

 rather redder than basal half. Markings as in ca/ffibodia. 

 The female differs from the typical female in being lighter, 

 clearer and more of a chestnut-brown in general colouration, 

 in having the transverse white band of both wings con- 

 siderably broader and in the hindwing hardly at all 

 suffused with black, and the outer area of forewing considerably 

 lighter than that of hindwing. The ocelli in both sexes are more 

 narrowly ringed with black than in t}qjical eambodia and have an 

 additional outer narrow ring of light grey. 



Length of forewing — d 1 61 mm; $ 65 mm. 



B. M. Type No. Rh. 119, 6 ; 120, $, Khao Sebap, near Chan- 

 tabun, S. E. Siam, Mareh 1916. 



S. eambodia was described by Hewitson in 1862 from the 

 single female which is now in the British Museum, and which is still 

 unique. Fruhstorfer in Seitz Macro-lep., ix, p. 425, suggests that 

 it may be only a form of S lou'isa Wood-M>son. However, the occur- 

 rence in Siam of 8. louisa siamensis, recently described by Lord 

 Rothschild (Nov. Zool. xxiii, p. 308, 1916), together with the above 

 described race of S. eambodia, establishes beyond doubt the validity 

 of the species. 



In describing the subspecies we have had no male of typical 

 eambodia for comparison, the female alone being known, but the 

 females before us, as explained above, are so sufficiently distinct from 

 the female Type of eambodia as to •warrant our belief that editha 

 will prove to be a good subspecies. 



JOUKX. NAT. HIST. SOC. SIAM. 



