On the Dismorphina of the New World. 373 



Hah. Jebba, Upper Niger, October 1898 {Dr. Cuthbert 

 Christy) . 



I have compared the types of these species with others in 

 the collections in the British Museum and at Tring, and both 

 the Hon. Walter Rothschild and Sir George Hampson agree 

 with me that the two species are new to science. 



LIU. — A Revision of the Dismorphina of the New World, 

 with Descriptions of new Species. By Arthur G. Butler, 

 Ph.D., F.L.S., F;Z.S, &c. 



When I revised the genera of Pierine Butterflies in the 

 ' Cistula Entomologica ' (vol. i. pp. 33-58) I admitted two 

 genera of Dismorphina, viz. Dismorphia, with the upper 

 radial of the primaries emitted from the end of the discoidal 

 cell, and Moschoneura, with the same vein emitted from the 

 subcostal vein beyond the end of the cell. A careful study 

 of the neuration of all the species in the Museum series failed 

 to show any other difference in neuration which was abso- 

 lutely constant. 



Under Moschoneura I placed the nehemia group, which 

 has since been separated under the name Pseudopieris by 

 the authors of the ' Biologia Centrali-Americana,' I think 

 correctly, for although it has the neuration of Moschoneura, it 

 differs considerably in form of wing and is evidently not a 

 mimicking group. 



The two other genera erected in the ' Biologia ' have less 

 claim to generic rank, inasmuch as they are based upon 

 neurational differences which are far from being constant. 

 Acmepteron is perhaps convenient as a division on account of 

 the peculiar form of the primaries ; but Enantia can only be 

 arbitrarily separated as a group or section of Dismorphia, 

 the position of the first subcostal branch of the primaries, 

 upon which its authors relied, being unfortunately very 

 variable, quite as much so as in the genus Euchloe; indeed, 

 I find it emitted both before and at the end of the cell in 

 examples of the same species, whilst in a closely allied species 

 it is emitted well beyond the end. Even the Ithomeine 

 character of Dismorphia does not form a trenchant distinc- 

 tion, because several admitted forms of Enantia have 

 Ithomeine females. 



The following is an account of the species, most of which 

 are either in the general series or the Hewitson collection in 

 the Museum. 



