462 Dr. A. G. Butler on the Pierine Butterflies 



$ . Above at once distinguishable from T. florentia ? by 

 the much less lavender tint of the greyish basal suffusion, its 

 almost entire absence from the secondaries, the dentate- 

 sinuate inner edging of the external border, which narrows 

 almost to a point at the external angle of the primaries, and 

 is distinctly narrower than in T. florentia on the secondaries 

 on both surfaces. 



Expanse of wings 72 millim. 



New Ireland (G. & S. coll). Two pairs, B. M. 



If this insect occurred in the same island with T. florentia^ 

 I should unhesitatingly regard it as the dry-season form of 

 that species. 



17. Tachyris leucosticfa. sp. n. 



Intermediate between the preceding and T. ciUa, nearly 

 resembling T. solstiti'ah's above in both sexes, but below 

 both sexes have the subapical spot of the primaries yellow 

 instead of white and the orange on the secondaries considerably 

 more restricted ; the width of the outer border appears to 

 var}^ seasonally, the wet-season form has the outer border of 

 the secondaries decidedly narrower and less regular than in 

 T. florentia, whilst the dry-season form is paler in colour and 

 has a slightly narrower border than T. solstitialis. 



Expanse of wings, S 69-83, ? 72 millim. 



Bourou, Ceram, Salwatty, Waigiou. 5 cJ, 1 ? , B. M. 



It is probable that this species has been confounded in 

 collections with T. cilia. 



18. Tachyris cilia. 



Pieris cilia, Felder, Reise der Nov., Lep. ii. p. 165 (I860). 

 Tachyris da vis, Wallace, Trans. Ent. Soc. 3, vol. iv. p. 367 (1867). 



Ke Island, Normanby Island, Am. 3 <?, B. M. 



T. clavis is the wet-season form and T. cilia the dry. The 

 females of both are in the Hewitson collection : that of 

 T. clavis white above and not unlike that sex of T. florentia, 

 excepting that the blackish border of tlie secondaries occupies 

 nearly half the wing-surface ; that of T. cilia is yellower and 

 resembles that sex of T. leucosticta on the upper surface, 

 excepting that it is greyer at base and has the inner edging 

 of the outer borders less sharply defined, whilst below it has 

 a broader outer border to the secondaries and the orange area 

 deeper in colour and much more extended. Hewitson's 

 examples of this species are from K^, Aru, and New Guinea. 



The males of T. cilla = clavis are characterized by the fact 

 that the apical border of tlie primaries completely encloses 



