186G.] ON FORMOSAN LEI'IDOPTERA. 357 



with diffused whitish stripes, and powdery yellowish marks between 

 the nervnres along the hinder margin. Beneath, differs from P. 

 hippo in the under wings being white, with dusky nervures and band 

 on outer margin, and a yellow edging at the base and the outer 

 angle. 



This is a local modification of the Indian P. hippo. 



Expanse 2|-2f inches. 



Hab. Formosa. 



" Frequents banyan trees." — Swinhoe. 



6. PONTIA NIOBE, n. S. 



Form and size of P. nina. Wings whiter ; the apical patch en- 

 tirely absent ; the discoidal spot very small, as in some specimens of 

 P. nina. Beneath paler and less irrorated, and the transverse 

 posterior band interrupted and less distinct than in the allied species. 

 Extreme tip of the antennae orange. 



Expanse If inch. 



Hab. Formosa. 



" Found in the dark shade of groves and lanes. Flies low, with a 

 slow dodging flight." — Swinhoe. 



7. Callidryas pyranthe, L. 



"Abundant among rank overgrown herbage." — Swinhoe. 



There is one specimen of a very small form of this species (If inch 

 expanse), which Mr. Swinhoe seems to consider distinct. It is, 

 however, identical in form and marking with the larger specimens. 



8. Callidryas alcmeone, Cramer. 



" Scarcer than the last, wilder flight." — Swinhoe. 



9. Terias hecabe, L. 



" Common among grass." — Swinhoe. 



A variety occurs much smaller than usual, and in which the black 

 margin of the upper wings is hardly sinuated, indicating a transition 

 to T. drona, Horsf. 



10. Terias vagans, n. s. 



"Wings with the anterior angle nearly square, but slightly rounded; 

 hind wings subangular. Male : pure yellow, with a black border on 

 the uppers, nearly as in T. lata, stopping abruptly before reaching 

 the outer angle ; hind wings with a very faint mark at the outer 

 angle ; beneath yellow, with an indistinct dusky transverse band 

 across the middle of the hind wings. Female : pale yellow, faintly 

 powdered with dusky scales ; dark border as in the male ; a very 

 minute dark mark at the end of the discoidal cell of the uppers, a 

 dusky patch at the outer angle of the lower wings, and the ends of 

 the nervures between it and the anal angle each with a transverse 

 black mark ; beneath nearly as above in colour, but without mark- 

 ings, except the mark at the end of the cell of the uppers, a black 



