1895.] ME,. H. H. DEUCE OX BOENEAN LYC-ENID.E. 609 



Mr. de Niceville supposes it to belong to this genus (J. A. S. B. 

 vol. Ixiii. pt. ii. no. 1, p. 43, 1894). 



Jacoona, Distant. 

 Jacoona jusana, sp. n. (Plate XXXIV. lig. 3 J •) 



<S • Allied to /. anasuja, Feld. IJppei-side — fore wing : outer 

 margin convex, and with the blue fascia which is be3'ond the cell 

 large and semicircular, extending from the costal margin across 

 the wing down to the first median nervule and almost reaching 

 the outer margin ; the inner marginal blue area is also much 

 more extensive, and reaches nearly to the anal angle. Hind wing 

 with the blue area also much more extensive ; the black marginal 

 spot between the first and second median nervules much smaller ; 

 a distinct black line along the centre of the tail (not always 

 present), and with the apex considerably more produced. Under- 

 side ochraceous hoary, but without the rufescent brownish ; the 

 outer margins as in /. anasuja, and with the third spot of the 

 inner series and the corresponding spot of the outer series small 

 and straight ; a prominent black streak at the base of the costal 

 nervure in the fore wing. 



$ much like that sex of N. amrita, Feld. Upperside white; 

 anal area more extensive, and the black spots more inclined to 

 separate. Underside as c? , but yellowish ochraceous. 



Expanse, d ^i, 2 24- inches. 



Sandakan {Mus. Bruce) ; Labuan ( Waterstr., Mus. Staud.). 



Messrs. Godman and 8alvin possess a male J. anasuja, Feld., 

 from Sumatra (SacJis), also a female from Singapore. 



The females in this genus have the same number of subcostal 

 nervules in the fore wing as the males, but the first branch is 

 eutii'ely separate from the costal nervure. They closely resemble 

 those of N. amrita, with which species they have doubtless often 

 been confounded, and like that species possess a tail on the lower 

 median nervide (which is, however, shorter) ; but they can be at 

 once distinguished from that species by the presence on the under- 

 side of the prominent black basal streak in the fore wing. 



Jacoona metasuja, sp. n. (Plate XXXIV. fig. 4 (f .) 



lol'ius metasuja, Staud. MS. 



cJ . Allied to J. jusana, paler Siud brighter blue with greenish 

 reflections ; the band on the fore wing, beyond the cell, much 

 narrower and shorter, and the blue basal area shorter. Underside 

 as in J. jusana. 



5 . Upperside differs from 5 jusana by the white anal area 

 being more extensive and the black spots entirely separated. 

 Underside as S ■ 



Expanse, c? l^jy, $ 2 inches. 



Kina Balu ( Waterstr.). Types Mus. Staud. 



The greenish reflections and the narrow blue apical band give 

 J. metasuja a very distinct appearance. The females of the three 



Pboc. Zool. Soc— 1895, No. XXXIX. 39 



