560' MR. H. H. DBUCE ON BOBNEAN lyo^nidjE. [June 18, 



I have not seen this species, the female only of which is de- 

 scribed. We possess specimens from Nias I. which are referred to 

 G. symethiis, but which possibly ai'e G. petronius if this should 

 prove to be a distinct species. 



Geiitdus innoceks, sp. n. (Plate XXXI. fig. 4 S .) 



Miletus innocens, Stand. MS. 



c? . TJpperside : fore wing white, the apical half and outer margin 

 to anal angle black, greyish along the costa to about the middle of 

 the cell : hind wing white, slightly tinged with greyish ; costal 

 margin broadly black ; anal and outer margins narrowly dusted 

 with blackish brown, darkest at the tips of the nervules. Underside : 

 ground-colour pale grey, \^"ith dark chocolate markings and spots 

 arranged much as in G. symethus, but the short band near the 

 apex of the fore wing straighter and broader and the basal streak 

 below the cell ending abruptly where it meets the white, just 

 beyond the base of the lower median nervule, not running along 

 the nervules as in G. symethus. 



5 . Upperside differs only from male by the white area of the 

 fore wing being slightly more extensive, by the purer white of the 

 hind wing, which has the outer margin dentated rather more 

 strongly than G. symethus (f , the cilia only being fuscous. Under- 

 side as male, but with the white discal area slightly larger. 



Expanse, d lf» 2 li ii^^h. 



Kina Baki ( Waterstr.). Types Mus. Stand. 



G. innocens is much like G. giijantes on the upperside, but is 

 very different below, and the dentated outer margin of the hind 

 wing of the female also distinguishes it. The swollen base to the 

 third median of the fore wing in the male, vt'hich is present, so far 

 as I know, in all other species of the genus, is entii'ely wanting, in 

 G. innocens. The coloration of the underside is quite different 

 from G. symethus. Dr. Staudinger has sent me a pair of this 

 interesting butterfly. 



GrEBXDirs BIG&SII. 



Gerydus Uyysii, Distant, Ehop. Malay, p. 206, pi. xxii. fig. 12, 5 

 (1884). 



Gerydus gopara, de Nicev. Butt. India etc. iii. p. 25 (1890). 



Kina Balu ( Waterstr.) ; Sandakan {Fryer) ; Labuan {Low and 

 Wahnes). 



This is a somewhat puzzling species, as it appears to vary con- 

 siderably in the width of the white band on the fore wing : in 

 males from Sandakan and Kina Balu it is shortest and narrowest, 

 and in one specimen in Messrs. Godman and Salvin's collection is 

 practically reduced to a median patch, being almost all below the 

 third median nervule ; in a male from Labuan in Dr. Staudinger's 

 collection it is broad and long and the basal area is much paler 

 than usual. The females before me from Kina Balu are much like 

 the male noted above from Labuan and present a very different 

 appearance from Mr. Distant's figure. 



