463 Dr. A. G. Butler on the Pier me Butterflies 



the subapical spot on the upper surface *, and on the under 

 surface this spot is bright yellow ; but these differences alone 

 would not be sufficient to separate it from T. leucosticta ; the 

 much greater orange area on the under surface of the second- 

 aries (corresponding with that of T. solstitialis) distinguishes 

 it at once. 



The following species was received in 1874 from the 

 Godeffroy Museum under the name of T. ada. 



19. Tachyris ella t sp. n. 



Allied to T. cilia, but with the subapical spot white below 

 in the male, as in T. ada] it is considerably smaller than the 

 latter in both sexes and the dark border to the secondaries on 

 the under surface of only about half the width ; the orange 

 on these wings is very much restricted, even more so than in 

 T. leucosticta. On the upper surface the male resembles 

 T. cilia in the extension of the dark brown apical area of the 

 primaries so as to enclose the subapical spot; the second- 

 aries, however, have a narrower and very sharply defined 

 dentate-sinuate outer border. 



Expanse of wings, $ 68, ? 62 millim. 



Yap, Caroline Islands. < ? , B. M. 



The female has the under surface of the secondaries whiter 

 than in any of the preceding species, the costa and veins 

 towards the base feebly washed with sulphur and the apex 

 clear ochreous. 



20. Tachyris ardens, sp. n. 



Appias andrea (part.), Semper, Reisen ira Arch. Phil, v., Rhop. p. 242 

 (1891). 



The Philippine representative of T. ciUa ; invariably 

 distinctly smaller. The primaries with the subapical spot 

 completely enclosed by the blackish apical border as in 

 that species, but the border of the secondaries with strongly 

 dentate-sinuate internal edging ; the subapical spot on the 

 under surface of the primaries varies from sulphur- to saffron- 

 yellow, and the secondaries below are either daffodil- 

 yellow, with rather less orange suffusion than in T. cilia, 

 or are wholly orange from base to border f. The female 

 nearly resembles in every respect that sex of T. ella, but 

 shows less colour on the under surface, the yellow and ochreous 

 being extremely weak. 



* In our male example of T. leucosticta from Waigiou the same 

 thing occurs, but to a slightly less prominent extent, 

 t Whether these are seasonal differences I am not in a position to say. 



