150 DR. F. WOOD JONES ON THE [ Feb. 16, 
DIPTERA. 
Species determined by E. E. Ausren, F.Z.S. 
ASILID&. 
(1) PurLopicus sAvANUS Wied. 
A common insect of very voracious habits. It is generally seen 
sitting on the coral boulders, in the hottest sunshine. It hes in 
wait for smaller diptera, and it will attack and kill even butter- 
flies as large as Precis villida. 
BoMBYLID. 
(2) AnrHRAX sp. Only a very few examples met with. 
DoLicHOPODID#. 
(3) New genus and species (No. I.), near Psilopus. 
(4) New genus and species (No. II.), near Psdlopus. 
Both of these are common insects, but owing to their green 
colour and small size, they are not at all conspicuous. They are 
shining green flies that are most commonly seen running on the 
leaves of the Hibiscus. They are extremely active, and are 
generally found during the hottest hours of the day. 
Muscip2. 
(5) SarcopHaGa sp. No. I. 
(6) SarcopHaca sp. No, IT. 
Both are common species, frequenting the dead bodies of rats. 
(7) Ruria TEsTAcEA Rob.-Desv. 
Few examples seen, mostly upon the herbage of the seaward 
side of the islands. 
(8) PycnosoMA FLAvICEPS Macq. 
The commonest fly in the atoll. 
(9) OPHYRA CHALCOGASTER Wied. 
MIcCROPEZID#. 
(10) Nerrus LINEoLATUS Wied. 
HIpPoposcip®. 
(11) PsevDoLFERSIA sPINIFERA Leach. 
Usually swarming over the plumage of the Frigate-birds. On 
