Pierine Butterflies of the Genus t)elias. 159 



73. Delias cestiva, sp. n. ? 



Possibly only a dry- season form of the preceding, but little 

 or nothing appears to be known regarding the seasonal 

 changes in this genus : it differs from D. mysis in its gene- 

 rally inferior size, narrower black apical border of primaries 

 continued as a slender line to the external angle ; the yellow 

 on the under surface of the secondaries is brighter, more 

 restricted, and more sharply defined, and the scarlet stripe is 

 considerably narrower, more as in D. timorensis. 



Expanse of wings, $ 60-70, ? 60 millim. 



Port Darwin and Port Essington. Five examples. B. M. 



One male was in the Godman and Salvin collection. 



74. Delias cruentata. 



Pieris cruentata, Butler, P. Z. S. 1865, p. 455, pi. xxvi. fig. 2. 

 Male (type), Mysol; male, Waigiou (coll. G. &S.). B. M. 



75. Delias lara. 



Pieris lara, Boisduval, Sp. Gen. Lep. i. p. 461 (1836). 

 Var. Delias intermedia, Mitis, Iris, vi. p. 149 (1893). 



Two males and one female, Port Moresby; male, var. in- 

 termedia. Port Moresby. B. M. 



Seven specimens, all from the Godman and Salvin collec- 

 tion. I am inclined to think that D. intermedia will prove 

 to be the dry-season form of this species and D. cruentata a 

 nearly allied species ; on the other hand, the latter may prove 

 to be the dry-season form and D. intermedia a form occurring 

 at the change of the seasons. At present, however, we have 

 no data to go upon. 



76. Delias agostina. 

 Pieris agostina, Hewitson, Exot. Butt, i., Pier. pi. i. figs. 1, 2 (1852). 



Darjiling, Nepal, Assam, East Pegu. Eighteen examples. 

 B. M. 



Thirteen of the specimens are from the Godman and Salvin 

 collection. In the Hewitson collection are seven other 

 specimens. 



The following species is so remarkably variable that it has 

 been split up into numerous named forms. In my opinion 

 the Indian and Chinese forms represent modifications of one 

 widely distributed species, the Indian variations ranging 

 almost white to almost black, the Chinese varying less 



