426 
THE STUDY OF INSECTS. 
J. Third segment of antennae without bristle or 
style; vein Vi ending at or before the apex of 
the wing (Fig. 568). p. 465. Scenopinid^e. 
JJ. Third segment of antennae usually with bristle 
or style; vein Vi ending beyond the apex of the 
wing. 
K. Vein VI U extending free to the margin of 
the wing or coalesced with vein IX for a short 
distance (Fig. 564). p.463. BombylidjE. 
KK. Vein Vila joining vein IX far from the 
margin of the wing, often extending towards 
the base of the wing (Fig. 569). p. 466. 
EmpididjE. 
EE. Vein III with not more than three branches. 
F. Wings lanceolate, and with no cross veins except at the 
base (Fig. 572). p.469. Lonchopteridje. 
FF. Wings not of the type represented by Figure 572. 
G. Flies with a very small head; with the thorax and 
abdomen inflated, giving the body a hunchback-like 
appearance, and with the alulets very large. The 
empodia pulvilliform, />., with three membranous lobes 
beneath the tarsal claws, p. 458. Acrocerid>e. 
GG. Head of ordinary size or very large; form of thorax 
and abdomen various; alulets either large or small. 
The empodia not pulvilliform, i.e., only two membra¬ 
nous lobes beneath the tarsal claws. 
H. Vein VI U appearing as a cross-vein or curved 
back towards the base of the wing (Figs. 569, 588). 
I. Antennae with a terminal style or arista, p. 466. 
Empididje. 
II. Antennae with a dorsal arista. 
J. Proboscis rudimentary; mouth-opening small: 
palpi wanting, p. 477 .CEstrid^e. 
JJ. Proboscis not rudimentary ; palpi present. 
K. Head with a suture immediately above the 
antennae through which the ptilinum is pro¬ 
truded and withdrawn (Fig. 587). p. 479. 
Muscidje. 
KK. Head without such suture, p. 466. 
Empidid^. 
HH. Vein Vila not coalesced with vein IX to such an 
