Nov. 1918.] Proceedings of the Asiat. Soc. of Bengal. _—_ecelxv 
Nemestrinidae—A most interesting family allied to both 
the Tabanidae and Cyrtidae. They inhabit hot, dry, sandy 
localities and frequently occur in the hills, hovering over paths 
and on the borders of woods, their movements in the air being 
made with lightning-like swiftness, making them exceedingly 
difficult to catch. Lichtwart reviewed the oriental species a 
few years back, establishing nine new ones, one of which, 
Ceylonia magnifica, I subsequently described again as new under 
the name of Atriadops nivea, from a specimen in my own 
collection, having overlooked Lichtwart’s paper. 
yrtidae.—A very peculiar and limited group of rather 
small, balloon-like globular flies that delight in hovering. Four 
new species have recently been added by me, whilst de Meijere 
has added one, and my second Fauna Volume will contain six 
more. Less than twenty altogether, including these latter, are 
known from the Orient. 
Bombylidae.—Quite a number of these have been known 
from all tropical regions since the earliest days of collecting, 
owing to their size and the great beauty of many of the species. 
Van der Wulp records about 100 though some of these have 
en proved invalid, and many of the remainder are un- 
Tecognisable through faulty or inadequate descriptions. An 
attempt at revision was made by me in 1909, adding 18 new 
ones, but a critical study of most of the Anthracinae remains a 
desideratum. About a dozen new species will be described in 
my new Fauna volume, on specimens in the British Museum, 
Indian Museum and Pusa collections. 
Therevidae.—An allied family to the previous one and one 
of the most difficult to déal with through the close affinity and 
Variability of many of the species. Krober has written up the 
family for the Genera Insectorum! and referred some of the 
older species to different genera. Only half a dozen or so new 
Species have been erected of late. 
| Fase. 148 (1913). 
