Pierine Butterflies of the Genus Delias. 159 
73. Delias estiva, 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 J). 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 /). timorensis. 
Expanse of wings, ¢ 60-70, 2 60 millim. 
Port Darwin and Port Essington. Fiveexamples. 3B. M. 
One male was in the Godman and Salvin collection. 
74. Delias cruentata. 
Pieris cruentata, Butler, P. Z. 8. 1865, p. 455, pl. xxvi. fig. 2. 
Male (type), Mysol; male, Waigiou (coll. G. & S.). B. M. 
75. Delias lara. 
Pieris lara, Boisduval, Sp. Gén. Lép. i. p. 461 (1836). 
Var. Delias intermedia, Mitis, Iris, vi. p. 149 (1893). 
Two males and one female, Port Moresby; male, var. n- 
termedia, Port Moresby. B. M. 
Seven specimens, all from the Godman and Salvin collec- 
tion. lam inclined to think that D. ¢ntermedia 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 J). ¢ntermedia 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. pl. 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 ito numerous named forms. In my opinion 
the Indian and Chinese forms represent modifications of one 
widely distributed species, the Indian variations ranging 
from almost white to almost black, the Chinese varying less 
