DIPTERA (TWO-WINGED FLIES). 
67 
TABANUS BOYINUS 
MESEMBRINA MERIDIAN A 
GASTROPHILUS_Kc^n. 
Cepltenomyia sits 
11 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. 
" Tabanidte (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 
I few may be caught sitting on tree 
\ trunks, leaves, walls, etc., and a few 
males taken hovering like Syrphidce 
in the air. 
" Muscidce Calypteratce may be met with in 
most situations. The species of many genera 
(Idia in particular) love flowers ; others, again 
(Lucilia, Callipliora, Polietes, etc.), are to be 
found round ordure and carrion. Mesemhrina 
and Rutilia, in company with many species of 
Anthomyinse and Tachinidce, love to sit on tree 
trunks, and prefer the sunny side. 
" (Estridce (Bot- and Gad-, or Warble -flies) 
are sa id to hover over mountain-tops. Hypoderma, 
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 
be noted that it is labour wasted to attempt to 
catch specimens of this genus with a white net. 
on stones in spots frequented by deer, and is 
