One of the most troublesome species is probably the House Gnat (Culex ciliaris), which, thirsting for its evening meal, often enters our apartments, sounding its approach by a tolerably loud humming.
Fig. 130.—Trichocera Fuscata (Mag.)
Culex annulatus is a little larger, and is said to produce a greater amount of irritation by its bite.
Family 7, Chironomidæ.—These insects are small delicate insects, much resembling gnats in appearance, and are popularly called "Midges." The larvæ of most of the species are aquatic.
The larva of Chironomus plumosus, which is common in stagnant water, is called the "blood worm" from its bright red colour.
Fig. 131.—Tipula Gigantea.
Family 8, Orphnephilidæ.—Most of the species belonging to this family are of small size.