On neio Species of hido-Malayan Lep'idoptera. 409 



free ; disks rather larj^e. Tibio-tarsal articulation reaching 

 the eye ; tibia 2^ times in length of head and body, con- 

 siderably longer than the foot ; toes two-thirds webbed, two 

 phalanges of fourth free ; subarticular tubercles small and 

 feebly prominent. Skin smooth above, granular on the belly 

 and under the thighs. Reddish brown above, with four 

 blackish longitudinal streaks ; a blackish streak from the 

 nostril to the eye and a dark brown temporal band ; lower 

 parts white. Male with a large external subgular vocal sac, 

 covered by a large round flat disk. 



From snout to vent 28 mm. 



A single specimen from Obuasi, S. Ashantee. 



Closely allied to R. oxyrhynchiis^ Blgr., from the Katanga, 

 but distinguished by tiie total aljsence of web between the 

 fingers and the presence of the gular disk, as well as by the 

 coloration. 



XXXVIIT. — New Species of Indo-Malayan Lepidoptera. 

 By Colonel C. SwiNHOE, M.A., F.L.S., &c. 



Family LycaBnidse. 

 Arhopala dascia, nov. 



? . Upperside much as in A. yaneRa, Moore, but darker 

 in colour. Underside with the ground-colour greyish white, 

 markings chocolate-brown; fore wing with a rather broad 

 medial band from the costa to vein 2, the immediate base of 

 the wing chocolate-brown, this colour running up the costa 

 for a short distance, the space between the base and the 

 median band filled up with fine transverse bands close to 

 each other, a disoal macular band of square spots which 

 become somewhat diffuse at the hinder angle, the tiiird spot 

 from the costa placed outwards ; the marginal space dark ; 

 a double row of lunular marks near the margin : liind wing 

 with the whole space, witii the exception of a large round 

 p/vtch below the middle of the costa, covered with round spots 

 (white-edged) on a dark groujid, very difficult to describe, 

 but exactly similar to Watson^s figure, plate A, fig. 6, ? , 

 Bo. N. H. Soc. X., of a form he likens to A. yanesa, remarking 

 that it deserves a distinctive name, but Watson's figure, 

 like A. yanesa, has no tails, and dascia has tails as in 

 A. aberrans, Doherfy. I cannot but think that Watson's 

 figure represents a specimen of dascia with the tails broken 

 off. 



Expanse of wings ly^g inch. 



Uah. Toungoo, Burma. 

 Ann. & Mag. N. Hist. Ser. 8. Vol. xix. 27 



