DIPTERA (TWO-WINGED FLIES). 
67 
" Asilidce (Robber-flies) affect many 
and varied situations. Roads, bare sandy- 
places, etc., are attractive to some 
species ; others sit on tree trunks, stones, 
and telegraph posts and wires. Others, 
again, prefer dry sticks and branches 
near the ground; while the species of 
Damalis and some few other genera love 
to sit on bare twigs at about the height of 
one's eye. 
" Tabanidce (Horse-flies) are often 
to be seen flying round living animals ; 
but few are to be caught in this 
situation, most of the species of this 
family being taken flying round 
oneself or one's companions. A 
few may be caught sitting on tree 
trunks, leaves, walls, etc., and a few 
males taken hovering like Syrjihidce 
in the air. 
" Muscidce Cctlypteratce may be met with in 
most situations. The species of many genera 
(Idia in particular) love flowers ; others, again 
(Lucilia, Ccdliphora, Polietes, etc.), are to be 
found round ordure and carrion. Mesembrina 
and Rutilia, in company with many species of 
Anthomyinse and Tachinidm> love to sit on tree 
trunks, and prefer the sunny side. 
" CEstridce (Bot- and Gad-, or Warble-flies) 
are said to hover over mountain-tops. Hyptoderma, 
however, is generally to be taken sitting on 
bare sunny places, in roads, heaths, etc. Gas- 
trophilus is often to be seen round horses, and 
may sometimes be taken with a net ; but it may 
gastrophilus equi. be noted that it is labour wasted to attempt to 
catch specimens of this genus with a white net. 
Cephenomyia sits on stones in spots frequented by deer, and is 
TABANIJS BOVINL'S 
M ESL.MBR1NA MERIDIANA. 
