APPENDIX. 457 



nervules, and a small patch of greenish scales preceaed In- ocliraceous at anal angle. Body and Icrs more 

 or less concolorous with wings. 



Exp. wings, 2 , 26 millim. 



HAii. — Malay Peninsula ; Malacca (coll. Staudinger). 



A single female of this distinct species was in the collection of Malaccan specimens 

 sabmittod to me by Dr. Staudinger. 



Genus POLYOMMATUS {antca, p. 230). 

 2. Polyommatus bagus. (Tab. XLIV., tig. 13.) 



Polijoiiiiiuitits biii/tcs, Distant, Auu. & Mag. Nat. Hist. ser. 5, vol. xvii. p. 532 (188G). 



Female. Wings above closely resembling those of the same sex of P. ba'ticus. Wings beneath pale 

 brownish ochraceous, with the following linear brownish fascias margined with greyish :— both wings with 

 two at end of cells and two submarginal fascite, the innermost broadest ; posterior wings with two large, 

 marginal, blackish spots, containing a few scattered greenish scales, inwardly margined with pale reddish- 

 ochraceous, and separated by the lower median nervule. Body above more or less concolorous with 

 wings, beneath with legs greyish-whits ; legs more or less streaked with brownish. 



Exp. wings, 2 , 30 millim. 



Hab. — Malay Peninsula ; Province Wellesley (Birch — coll. Dist.). 



I am indebted to Mr. J. K. Birch for a specimen of this very interesting species. 



Genus MEGISBA. 



Merjisha, Moore, Lap. Ceyl. vol. i. p. 71 (1881). 



This genus is allied to Polt/ommntus by having the first subcostal nervule of the anterior wings free 

 and not anastomosed with, nor impinging on, the costal nervure, and like that genus the posterior wings 

 possess a single filamentous tail-like appendage. The other characters relied upon by Mr. Jloore are in 

 the anterior wings: — "first subcostal branch emitted at nearly one-half length before end of the cell, 

 second at one-third before its end, third at one-eighth, the fourth at one-half beyond and terminating 

 before the apex ; discocellulars very slender ; middle median branch emitted immediately before end of the 

 cell, lower at one-half before its end ; submedian straight ; hindwing convex at the apex, oblique towards 

 anal angle, abdominal margin long; first subcostal branch emitted at one-fifth before end of the cell; two 

 upper median branches from a short distance beyond end of the cell. Alidomcn long, reaching to anal 

 angle." 



This genus has been so recently proposed that it is impossible to estimate its area of 

 distribution, at least, until we know what species are to be included in it. 



1. Megisba thwaitesi.* (Tab. XLIV., fig. 4.) 



Miyi.sba Thwaitesi, Moore, Lep. Ceyl. vol. i. p. 71, t. 3i, f. 3, 3 a, h (18811. 



"Male and female. Upperside dark violet-brown; forewing with an oblique lower discal white- 

 speckled patch. Cilia whitish. Underside bluish-white : forewing with four blackish spots on middle of 

 costal border, one within the cell, a brown discocellular streak, an outer discal transverse curved series 

 of five brown streaks, a marginal row of blackish spots bordered inwardly by a narrow sinuous line and 

 outwardly by a linear marginal line : hindwing with three black subbasal transverse spots, one on middle 



■•• Named after Dr. George Heiiry Kendrick Thwaites, fur many years the Director of the Eoyal Botanic Ganlcu, 

 Peradeuiya, Ceylon, which imder his management became " perhaps the most beautiful tropical garden in the world." 

 Dr. Thwaites was also an entomologist. He tiied at Kandy on September 11th, 18S2. 



Sept. 30, 1886. 6 a 



