1896.] MR. H. H, DRUCE ON BORNEAN LYCENID#. 679 
beyond the end of the cell, and that supposing, as I do, that the 
subcostal nervure reaches the margin, there are only two subcostal 
nervules—the first being emitted rather beyond the middle of the 
cell and entirely free for its whole length; the second being 
emitted rather more than halfway between the end of the cell and 
the apex. 
This description of Mr. Distant’s led me to state in P. Z.S. 1895 
that the females of this genus possess the same number of sub- 
costal nervules as the males, which now turns out to be incorrect. 
They have the same number as the females of Neocheritra (viz. 
three), but the first appears to be more bent towards the costal 
nervure than in that genus. 
On examining the neuration of the two species which I have 
described from Borneo, I find that it is as noted above. 
Jacoona Mprasusa, H. H. Druce. 
The figure given in P. Z. 8. 1895, pl. xxxiv. fig. 4, is not a very 
good one, as it does not show the beautiful opalescent green which 
is such a distinctive character of this species. 
Brpvanpa, Distant. 
BipuanDA HEWITSONII, H. H. Druce. (Plate XXXI. fig. 9,3.) 
Biduanda hewitsoni, Druce, P. Z. 8. 1895, p. 615. 
dg. Upperside dark violaceous blue. Fore wing with costa 
and base narrowly, apex and outer margin broadly black. Hind 
wing with the shining patch large and conspicuous and extending 
over half the cell, centred by a large patch of differently-placed 
cream-coloured scales; apex and anal angle black; a quadrate 
white spot between the lower median and submedian nervure, 
placed above the black; a small white patch outwardly bordered 
by a black line between the two lower tails; lobe dusted with pale 
blue scales. Cilia of fore wing black, of hind wing white, except- 
ing towards the apex, which is black. The underside differs from 
that of the female, being of a dull pearl-grey, darker and browner 
towards the apical and costal margins; otherwise as in that sex. 
Expanse, ¢ 12-1,3, inch, 2 13-154 inch. 
Sandakan. Type Mus. Druce. 
We have received several specimens from Sandakan, and Mr. D. 
Cator has also captured it at that place in March and May. 
From the description this species appears to be very close to 
B. cineas, Grose Smith, which I have not seen; but on the under- 
side the thin metallic blue line extends over the black on the hind 
wing from the apex to the abdominal margin, whilst in B. cineas 
it appears to be only at the anal angle. The female, as described, 
of B. cineas is quite different from that of B. hewitsonit. 
Marmessus, Hiibn. 
MaARMESSUS BOISDUVALI, Moore, var. ATRA, nov. 
3. Upperside differs from that sex of typical M. borsduvala in 
