124 Mr. A. G. Butler on a new Genus of Satyridae. 



The other species of Pilophoron are not represented in the 

 Kew Herbarium. 



V. Heterodea, Nyl. 

 1. H, Mullen, Nyl. 



Of this there is no specimen in herb. Kew ; but in a specimen 

 from New Caledonia, given me by Dr. Nylander, the reaction is 

 K-C-. 



VI. Thysangthecium, Berk. & Mont. 



1. T. hyalinum, Tayl. (K+ C-). 



Australasia: — Swan River (Mr. J. Drummond). 



2. T, Drummondii, Hook. hb. (K+ C + ). 

 ? (Mr. J. Drummond). 



XXII. — Description of a new Genus and one new Species of Saty- 

 ridae. By Arthur G. Butler, F.Z.S., Assistant, Zoological 

 Department, British Museum. 



[Plate III.] 



The four species upon which I propose to form the present 

 genus have hitherto been confounded with Lasiommata of West- 

 wood (fig. 4), a genus from which they differ in almost every 

 structural detail, but which the male sex somewhat resembles in 

 coloration. They are more nearly allied to (Sati/rus) Hipparchia 

 of Fabricius (fig. 5), from which they may be readily distin- 

 guished by the form of the discoidal cell in the hind wings ; 

 the several parts, however, when seen under a high magnifying- 

 power, show that this group is widely distinct from both the 

 above-named genera. 



The antennae oi Hipparchia (fig. 11) are much flattened and 

 expanded at the tip, and present the appearance of a shovel, 

 the shank being very slender: in Lasiommata^ a modification 

 of this form exists (fig. 10) ; but here the club more nearly 

 resembles a pear-shaped gauge f ; in the third form (fig. 9) the 

 club is entire, merely showing an indistinct dorsal line. The 

 plumules on the males of Hipparchia (fig. 14) and Lasiommata 

 (fig. 13) are much elongated, and somewhat resemble the scales 

 on species of Erebia; in the present genus they are oblong, 



* Since writing this, I have determined that this is not the true type of 

 Lasiommata. 



t This form can only be seen by turning the antenna round, the position 

 of the club in relation to the shank not being the same as in Hipparchia. 



