CYRESTIS. CHERSONESIA. 353 



than pale grey, and the markings are less blurred. Many Sikhim 

 specimens, however, are very similar to the pale Andaman form. 



367. Cyrestis periander, Fabr. (Papilio) Mant, Ins. ii, 1787, p. 9; 

 de N. Butt. Ind. ii, 1886, p. 255 ; Moore (Apsithra), Lep. Ind. 

 iv, 1899-1900, p. 61, pi. 308, figs. 2, 2 a, <$ $ . 



Upperside white, often more or less irrorated with dusky scales, 

 especially towards the bases of the wings; fore and hind wings 

 crossed by transverse narrow interrupted bands of ochraceous 

 yellow, four across the cell of the fore wing, 

 of which the basal, preapical and apical 

 are short, not continued to the dorsum ; a 

 broader posterior postdiscal transverse ochra- 

 ceous band on the hind wing not extending 

 beyond vein 6 ; apex of fore and termen 

 broadly of both fore and hind wings dull 

 blackish, traversed by a series of more or less 

 hastate jet-black spots, which on the fore 

 wing are minute, placed on the dull blackish 

 margin, and on the hind wing larger, bordering 

 Fig. 66. t Qe black margin ; outwardly circled by very 



Cyrestis periander. \. slender black lunules ; fore and hind wings 

 with a prominent subterminal black line 

 bordered on either side very narrowly with white, tornal lobe 

 often bluish. Underside pearly white with a pink tinge ; markings 

 as on the upperside, but more dull and faint. Antennae ochraceous 

 brown ; head, thorax and abdomen dusky white. 

 Exp. <$ 2 48-54 mm. (1-9-2-1 2"). 



Hab. Tenasserim and Siam, spreading through the Malayan 

 Subregion to Java. 



Genus CHERSONESIA. 



Cyrestis, pt., Westivood, in Dblday., Westiv. fy Heto. Gen. Di. Lep. 



ii, 1850, p. 260 ; de N. Butt. Ind. ii, 1886, p. 248. 

 Chersonesia, Dist. Rhop. Malay. 1883, p. 142. 



Type, C. risa, Doubleday, from India. 



Range. Indo-Malayan Region. 



<$ 2 • Fore wing : costa arched, apex obtusely pointed, termen 

 straight or convex, tornus angular obtuse, dorsum slightly bi- 

 sinuate ; cell short, about one-third length of wing ; upper disco- 

 cellular minute, middle about one-third length of lower, lower 

 slightly curved outwards below ; middle and lower discocellulars 

 in a straight line inclined slightly inwards ; veins 3 and 4 stalked, 

 well beyond lower apex of cell, 10 out of 7, 11 free. Hind wing 

 irregularly subtriangular ; costa slightly arched, apex truncate ; 

 termen slightly curved, dentate at apex of vein 4 ; tornus lobed, 

 but not so elongate as in Cyrestis ; dorsum convex above lobe ; cell 



vol. i. 2 a 



