or rudimentary. Antennae up to fifteen segments, 

 densely pectinate in <? , 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/ c Vers de Vase.' 



(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 Tersesthes. New Mexico. 



ln TOT\om\. 



Fig. 1 1 8. The arrow indicates the point at which the costal vein ends 



4. Psychodidae. (Moth flies). 



Very small. Antennae very hairy. Wings very 

 hairy (Fide 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. 



(i) Genus Phlebotomus. Europe and tropics. 



5. Simulidae (Sandflies, Buffalo-gnats). 



Small hump-backed flies. Antennae destitute of 

 hairs. Wings relatively large. Proboscis short, thick, 



