1895.] MB. H. H. DRUCE OK BORXEAK LTC^aaO^. 617 



BlDITANDA IMITATA, sp. n. 



2 • Upperside much like M. boisduvalii, Moore, $ , differing 

 only from that species by the greyish-blue scales towards the aual 

 angle of the hind wing being more extensive. Underside — ground- 

 colour of fore wiag pale yellow, whitish at the base and with a 

 broad pale brown apex ; a short dark brown streak near the base, 

 a circular dark brown spot ringed with white between the base 

 and a broad brown band which crosses the middle of the cell ; a 

 short pale band closing the end of the cell, with a separated spot 

 over it close to the costal margin, beyond this a dusky, dark- 

 bordered, rather broad band from the second subcostal nervule to 

 the submedian nervure, broken on the third median nervule and 

 palest in median interspaces, and halfway between this and the 

 outer margin a dusky line divided by the nervules. Hind wing 

 with markings and spots arranged as in M. boisduvalii, but all of 

 a dark brown colour and with the apex very faintly pale yellowish. 



Expanse Ij inch. 



Borneo. Type Mus. Druce. 



B. imitaia is remarkable for its close resemblance to M. bois- 

 duvalii, but we have no knowledge of that species occurring in 

 Borneo. 



Marmessus, Hiibn. 

 (Drupadia, Moore.) 

 Marmessus moorei. 



Siihon moorei, Dist. Ann. & Mag. Nat. Hist. ser. 5, vol. x. p. 246 

 (1882) ; Ehop. Malay, p. 236, pi. xx. figs. 21, 29, 30 (1886). 



Siihon ravindra, Druce (nee Horsf.), P. Z. S. 1873, p. 351. 



Kina Balu (Waterstr.) ; Elopura (Pryer) ; Labuan (Low and 

 Waterstr.) ; Daat Island {Distant) ; Trusan and Lawas (Everett). 



This is a common insect at Labuan, and Mr. Low's collections 

 contained a large number of specimens. 



Marmessus surikdra, sp. n. (Plate XXXIV. fig. 7 d •) 



(S . Closely allied to M. ravindra, Horsf., from which it differs 

 on the upperside by the blue on the hind wing, which is of a deeper 

 shade, extending to the apex and close along the subcostal nervure 

 to the glandular patch ; and on the underside by the band beyond 

 the cell in the fore wing being linear its entire length, not widen- 

 ing out at the end of the cell as in that species. 



Var. ALBiTLA, nov. 



(S . Differs on the underside by the ground of the fore wing being 

 pure white, with the apex and outer margin fuscous ochreous, and 

 the black markings on both wings smaller. 



$ . Upperside dark brown, bluish grev towards anal angle. 

 Underside as male. 



Kina Balu (Waterstr.) ; Sandakan (Pryer) ; S.E. Borneo 

 (Wuhnes). Mus. Gr. & S., Stand., and Druce. 



