Dr. A. G. Butler on new Species of Butterflies. 53 



satisfactory group is once begun, the process is likely to 

 continue, since the importance of differences on which sub- 

 orders and families have been established can be magnified 

 at will to justify the elevation of a family to the rank of a 

 suborder, and of a suborder to the rank of an order. 



Note on Apseudes Latreillii {Milne-Edwards ?) . 



In the description given of this species by Professor G. O. 

 Sars in 1880, and more fully in 1886, it is stated that the 

 segments of the perseon are without ventral spines. In the 

 description of it by Norman and Stebbing, published in 1886, 

 it is said that the carapace and pereeon-segments are " without 

 spiny armature either on the sides or ventral surface, except 

 that the last segment of the pereeon has a large spine-like 

 projection on the middle of its under surface." These state- 

 ments appear to need a little modification, for, among nume- 

 rous specimens dredged this summer in Salcombe estuary, a 

 few, not otherwise distinguishable from the rest, show a 

 ventral spine on the fourth as well as one on the seventh 

 perseon-segment. The spine in question is pointed slightly 

 forward, and arises from tlie middle of the hinder part of the 

 ventral surface of the segment. Being placed just between 

 the legs it is not always easy to detect, though its size is 

 considerable. 



EXPLANATION OF PLATE IV. 



Dorsal view of the specimen, with both pairs of anteunsa and both 

 uropods, but the limbs of the left side only. 



n.s., natural size. 



oc, front of head with the eyes. 



a^., upper antenna; a.i.y lower antenna; gn. 1, first gnathopod (or 

 cheliped) of the right side ; gn. 2, second gnathopod ; p7-p. 1-5, the 

 five perseopods ; pip., one of the pleopods ; wr., terminal portion of 

 pleou with the uropods. 



All the separate parts are magnified to the same scale, with the excep- 

 tion of the cheliped, which is a little less magnified than the others. 



VII. — Descriptions of new Species of Butterflies of the Oenus 

 Catasticta in the British Museum. By Arthur G. 

 Butler, Ph.D. &c. 



The following species have been in the Museum without 

 names for many years ; and, as I find that they are unques- 

 tionably not described, I propose to name them now. 



