190 SOME UNDESCRIBED RHOPALOCERA FROM SIAM. 



B. M. Type No. Rh. 135, 9, Nong Yai Boo, S. E. Siam, April 

 1914. 



This species is most readily separable from H. vitta Butler, 

 ( chahroni Plotz) by the absence of the white subapical spot on 

 the forewing, and the much greiter width of the white transverse 

 band of the underside of the hindwing. Butler in his figure and 

 description of H. vitta makes no mention of the presence of this 

 minute subapical spot, and consequently Elwes failed to identify the 

 sj)ecies with chabrona, but nevertheless his Type, which is in the 

 British Museum, most obviously possesses it. A form of vitta, which 

 may prove to be a distinct subspecies of it, also occurs in Siam but 

 has not been obtained yet in sufficient numbers to enable us to 

 judge whether the slight differences from typical vitta exhibited are 

 constant or not. 



JUUKN. NAT. HIST. SOC. SIAM. 



