some new and little-known Bornean Lycaenidae. 275 
317. Lycaenopsis matanga, Chpmn. (Plate X, fig. 11). 
In 1910 two Lycaenopsids (representing two 
species as I thought) were sent to Dr. Chapman for 
determination. Unfortunately they were in bad 
condition, and Dr. Chapman finding no differences 
in their genitalia described them as one species 
(Lycaenopsis matanga), depositing the type in the 
British Museum and returning the co-type to me 
in Sarawak. Later, two more examples of a species 
agreeing well with Dr. Chapman’s figure of matanga 
were obtained in Sarawak, but they were so different 
to the co-type, which was alone available to me for 
comparison, that I was induced to describe them as 
new under the name of Lycaenopsis delapra. Since 
returning to England I have now compared 
these with Dr. Chapman’s type of matanga and find 
them identical, so that my species sinks before his. 
However, there are six more specimens in the Sara- 
wak Museum exactly agreeing with his co-type and 
uniformly differmg from his type. These are 
therefore left without a name, as, although appar- 
ently alike in genitalia, they are sufficiently constant 
in their differences from matanga to warrant separa- 
tion from that species, and I now describe them as 
Lycaenopsis chelaka. The synonymy of L. matanga 
is now thus :— 
Lycaenopsis matanga, Chpmn., Trans. Ent. Soc. 
Lond., p. 185 (in parte), pl. xxvii, fig. 1 (1911). 
Lycaenopsis delapra, Moulton, Journ. Str. Br., 
Roy. Asiat. Soc., No. 60, p. 98 (1911). 
318. Lycaenopsis chelaka, n. sp. (Plate X, fig. 10). 
Lycaenopsis matanga, Chpmn., l.c. p. 185 (in parte).* 
6. Upperside. Dark fuscous brown; sub-discal area of 
fore-wing iridescent violet blue. Fore-wing: the violet- 
blue area extends from median nervure to inner margin 
* The following passages in Dr. Chapman’s description of L. 
matanga refer to L. chelaka :—‘‘ On the upper wing is an area of blue, 
rather violet in one specimen. . . . In one specimen it is a little 
more restricted. In the hind-wing there is a slight central tint in 
one specimen.” His detailed description of the underside also 
refers to this species. 
