3 8 7 
or rudimentary. Antennae up to fifteen segments, 
densely pectinate in S , often simple in ? and smaller. 
Legs long and slender. Tibiae and tarsi nearly 
cylindrical. Costal vein ends at apex of wing. 
(1) Genus Chironomus. — Not blood sucking. 
Larvae are ‘ blood worms/ ‘ Vers de Vase. 4 5 
(2) Genus Ceratopogon. —-Very minute midges. 
Wings generally spotted. Head depressed in front, 
produced into a short rostrum. Antennae thirteen 
segments, the first eight bead-like, the rest elliptical. 
Sub-costal vein ends beyond half the length of the wing. 
Second long vein ends near the tip, third long vein at 
the tip. Femora armed beneath with spines. Larvae 
mostly non-aquatic. C. varius. A pest in Great Britain. 
(3) Genus Persesthes . New Mexico. 
Fig. 118 . The arrow indicates the point at which the costal vein ends 
4. Psychodidae. (Moth flies). 
Very small. Antennae very hairy. Wings very 
hairy (Vide Fig. 17). Larvae of some genera amphi¬ 
bious. The larvae and pupae resemble those of 
Ceratopogon. The eggs are laid in a cluster on the 
water. 
(1) Genus Phlebotomus. Europe and tropics. 
5. Simulidae (Sandflies, Buffalo-gnats). 
Small hump-backed flies. Antennae destitute of 
hairs. Wings relatively large. Proboscis short, thick, 
