204 MESSES. H. J. EWES AND JAMES EDWAEDS : 



Hah. Island of Nias {Modigliani). 



Described from three specimens, one in coll. Elwes, one ex coll. Rothschild, and 

 one ex coll. Staudinger ; in the fore wing of the two latter the pale spots proper to 

 cells 6 and 7 are wanting, and the pale cell-spot is only visible on the underside. 



Scobur.a, nom. nov. 

 Isma, Watson, P. Z. S. 1893, p. 83, nee Distant, Rhop. Mai. p. 386 (1886). 



The species here dealt with under this genus are associated on account of their 

 general resemblance to Hesperia cephala and H. bononia of Hewitson, and the main 

 distinguishing feature common to them all is the presence of pale spots in both fore 

 and hind wings ; the palpi are ascending, with an inconspicuous third joint, and there is 

 no sex-mark on the wings of the male. Antennae more than one-half, in some species 

 two-thirds, as long as the costa ; club slender, apiculus moderate and gradual. It 

 comprises two natural sections, one consisting of cephala and cephaloides, and the other 

 of feralia and its allies. 



Watson, in his Revision of the genera of Hesperiidse, characterizes a genus which he 

 calls Isma, Distant, and gives obscura, Distant, as the type of it ; but it appears from a 

 statement of Mr. de Niceville (Jour. Bomb. Nat. Hist. Soc. 1895, p. 378) that Watson's 

 diagnosis of the genus Isma was drawn up from " Hesperia " cephala, Hew., and we find 

 that it does not agree with the type specimen of Isma obscura, Dist. Under all the 

 circumstances, it appears that the genus Isma of Watson requires another name, and 

 that of Scobura has accordingly been applied to it. 



The following is a table of the species known to us : — 



1 (4) . Fore wing : hyaline spots in cells 2 and 3, 2 and 4, or in cell 2 



only, not in cells 2, 3, and 4. Hind wing below with the pale 

 spots pure white and dark-edged. 



2 (3). Fore wing : no hyaline spot in cell 3. Hind wing below 



yellowish green or greyish green, with a large white spot near 



the base of cells 4-5, touching veins 4 and 6. 

 2a {2b). Cell-spot of the fore wing not reaching the subcostal. Hind wing 



below yellowish green cephala, Hew. 



26 (2 a). Cell-spot of the fore wing passing from the median to the subcostal. 



Hind wing below greyish green martini, n. sp. 



3 (2). Fore wing : no hyaline spot in cell 4. Hind wing helow with the 



hasal half yellow, the apical half reddish brown ; a white spot 

 about the middle of cell 1 b, and one each near the bases of 

 cells 2, 3, and 5 cephaloides, de Nicev. 



4 (1). Fore wing with hyaline spots in cells 2, 3, and 4. 



5 (14) . Pale spots on hind wing oblong or cuneate or both. 



