MESAPIA. 155 



at about three fourths of the length cf the cell, and running 

 obliquely to the costa, the second emitted at or a little before 

 the end of the cell, and slightly arched, the third emitted a 

 little beyond the cell, and running to the costa just before the 

 apex, the fourth emitted about half-way between the end of the 

 cell and the apex, and running to the hind-margin just below 

 the latter. Disco-cellular nervules oblique, the discoidal and 

 median nervules nearly straight. Hind-wings with the upper 

 sub-costal nervule emitted at half the distance between the 

 base and the upper disco-cellular nervules, the nervules running 

 to the hind margin straight, and at nearly equal distances apart; 

 a well-marked basal cell ; two sub-median nervures." 



MESAPIA PELORIA. 



Pieris peloria, Hewitson, Exot. Butterflies, i. pi. 2, figs. 15, 1 6 



(1853). 



Mesapia peloria, Kirby, Entomologist, xxvii. p. 101 (1894). 

 Aporia lama, Alpheraky, in Romanoffs Mem. Le*pid. ii. p. 

 404 (1887). 



Greenish-white, with the nervures broadly margined with 

 grey, and grey spots on the nervures on the hind-margin of the 

 hind-wings. Under side of hind-wings yellowish-white, tinged 

 with orange, with all the nervures strongly bordered with brown, 

 as is also a fold so strongly marked as to look like an additional 

 sub-median nervure below the median ; costal area and basal 

 cell orange. 



The Butterfly measures an inch and a half across the wings. 

 It is found at a great elevation in the mountains of Chinese 

 Tartary and N.E. Thibet. 



This is the only known species of the genus. Mesapia shcm'tt, 

 Bates, from Yarkand, is also a true Pierid, but it is the 



