1 22 MR. A. G. BUTLER ON [Feb. 16, 



the absence of an accessory cell, in the non-furcate subcostal 

 branches, in the very important point of the absence of a costal 

 vein to the secondaries, the simple instead of forked subcostal vein, 

 the presence of a radial vein, which in Mijdrodoxa is absent, and 

 the more slender legs with better defined tibial spurs. Altojjether, 

 in spite of a similarity in the palpi of Mydrodoxa and Mydro- 

 thavtna, the latter is decidedly more nearly allied to Eupyra. 

 Type M. ada. 



Mydrothauma ADA, n. sp. (Plate VI. fig. l.) 



(S . Nearest to M. semperi (^Mydrodoxa semperi, Druce, P. Z. S. 

 1885, p. 519, pi. xxxii. fig. 1), which is a true JSlydrothavma, but 

 far more beautiful ; primaries above velvety greenish black, with 

 three metallic violet spots forming an arched stripe across the base ; 

 a narrow band of gold with diffused greenish edges across the basal 

 third, its inferior extremity not quite reaching the inner margin ; 

 the disk almost wholly occu])ied by two large unequal golden spots 

 or patches with diffused greenish edges : secondaries intense seri- 

 ceous black ; the costal area greyish ; a minute steel-blue spot at 

 the end of the cell ; a trifid subcuneiform hyahne patch divided by 

 the second and third median branches : head and collar vivid 

 carmine ; thorax velvety black, the meso- and metathorax clothed 

 at the sides with deep smoky brown hair : abdomen blackish 

 brown, almost black, w ith velvety black lateral tufts ; each 

 segment marked with lateral metallic violet-blue dashes : wings 

 below very like the under surface of M. semperi, excepting that 

 they are blacker, the discocellular veinlets are defined by metallic 

 blue instead of green spots, and the gold and green on the external 

 area is much more extended ; body below black, tlie legs and sides 

 of venter spotted with metallic blue spots. Expanse of wings 48 

 miUim. 



A single examjile only of this charming novelty was captured by 

 Mrs. Pryer, to whom (at her husband's request) I have dedicated 

 it. 



Phissama vacillans. 



Amphissa vacillans. Walker, Lep. Het. iii. p. 685. n. 1 (1855). 



LlTHOSIID^. 



Cabarda bizonoides. 



Lydene bizonoides. Walker, Journ. Linn. Soc. vi. p. 11 1 (1862). 

 C. molliculana=C. sequens is perhaps only a variety of this 

 species. 



Katha, sp. inc. 



The single example is not perfect and therefore I hink it better 

 not to describe it ; it is like a small example of K. intennixta. 

 Walk., from Southern India, but the face is greyer. 



