40 1 On Two new Species of Butterflies. 



end; plane of mouth forming a distinct angle with the longi- 

 tudinal axis. 



Hab. Common on Atriplex canescens at Mesilla Park, New 

 Mexico (C/cll.). Moths emerging at the middle of August. 



1 have known the cases for several years, but until recently 

 have been unable to breed the moth. 



Mesilla Park, New Mexico, U.S.A., 

 Aug. 26, 1898. 



XLVI. — Descriptions of Two new Species of Butterflies of the 

 Genus Thysonotis. By II. Grose-Smith, B.A., F.E.S., 

 F.Z.S. 



Thysonotis zuleika. 



Male. — Upperside. Differs from T. apollonius } Feld., in the 

 following respects : — On the anterior wings the white band 

 which crosses the middle of the wings to the inner margin is 

 much less distinct, being irroratcd with blue scales, in this 

 respect approaching T. lampros, Druce, and the costal and 

 outer-marginal black bands are narrower than in either of 

 those species. On the posterior wings the white central area 

 is considerably wider, and the dark outer marginal area is 

 narrower than in those species. 



Underside with the white areas on both wings much more 

 extended, the black outer-marginal areas being correspon- 

 dingly narrower ; the blue submargiual bands on the posterior 

 wings are also narrower, and the black spots in them are 

 smaller and rounder. 



Female. — Upperside. Both wings black; anterior wings 

 crossed about the middle, from the upper discoidal nervule to 

 the inner margin, by an irregular, curved, transverse white 

 band ; the apical third of the costal and outer margins is 

 rather broadly white. Posterior wings crossed a little before 

 the middle by a broader white band than in T. apollonius. 



On the underside the apex of the anterior wings is also 

 broadly white, and the white central band extends at its apex 

 to the subcostal blue band ; in other respects the underside is 

 as in the male. Cilia of both wings narrowly white. 



Expanse of wings 1^ inch. 



Hab. Rossel Island, Louisiade Archipelago {Meek). 



In the collections of Mr. Grose-Smith (types, £ $ ) and 

 the H©n. Walter Rothschild. 



