614 MR. H. H. BRUCE OTST BORNEATST LTCiENID.^. [Juiie 18, 



It also occurs in N.E. Sumatra. 



Some males have a large orange spot on the disc, others a small 

 one, and others again are without any. 



BiDUANDA E8TELLA, Var. 



Sithon estella, Hew. 111. Diurn, Lep,, Lye. p. 31, pi. xvi. figs. 50, 

 61 (1863). 



Kina Balu Mts. (Waterstr.). 



Dr. Staudinger has sent me a pair ( c? $ ) which agree well with 

 Hewitson's types from Sumatra, but are somewhat larger. It is 

 distinguished at once from B. thesmia by the broken band on the 

 fore wing below. The specimens referred to Sithon estella by 

 Mr. Herbert Druce (P. Z. S. 1873, p. 352) are B. unicolor described 

 above. 



BiDUANDA TH^NiA, sp. n. (Plate XXXIV. fig. 2 2 .) 



$ . Upperside dull brown ; fore wing crossed about the middle 

 with an oblique, whitish, indistinctly bordered band reaching from 

 the subcostal nervure, where it is narrowest, nearly to the sub- 

 median nervure. Hind wing narrowly whitish along the costal 

 margin ; three blackish spots at the anal angle between the tails. 

 Underside white, with spots and markings arranged as in Hewit- 

 son's figure of B. theda ; but the spots in the cell of the fore wing 

 are reduced to mere dots, and the markings on the hind wiug are 

 linear excepting those near the base. 



Expanse l^g- inch. 



Sandakan {Fryer). Mus. Q. & S. 



The type specimen is unique. When the male is found it will 

 probably be much like that sex of B. theda, Hew., and B. thesmia, 

 Hew. It can be distinguished from B. theda by the linear mark- 

 ings on the bind wings below, and the much less distinct whitish 

 band on the fore wing above. 



BiDtJANDA CINESIA. 



Myrina awrna, Hew. 111. Diurn. Lep., Lye. p. 29, pi. xiii. 

 figs. 18, 19 (1863). 



$ . Upperside dull blackish bi own ; fore wing slightly tinged 

 with cupreous towards the centre ; hind wing darker towards anal 

 angle, and with a broad, distinct, waving white band not crossed 

 by dark nervules, margin dusted with white between the tails. 

 Tails equal in length to those of male. Underside as in male. 



Expanse 1| inch. (Hew. fig. c? l^V inch.) 



Sarawak {Heu'.) ; Elopura (Pryer) ; Kina Balu ( Waterstr.). 



Hewitson's figure of tlie female undoubtedly represents another 

 species, as, besides being smaller and having the central tail con- 

 siderably longer than in B. cinesia, it presents other differences 

 which I have described below. 



Mr. Pryer took this species in March. 



Dr. Staudinger has received both sexes from Kina Balu, the 



