Fig. 174.—Louse and its eggs attached to a hair. Natural size and magnified.
Fig. 175.—Bed bug. × 5.
Fig. 176.—Life history of mosquito.
Illustrated Study of Insect Pests (Figs. [171]–176).—Why does the clothes moth (171) lay its eggs upon woollen clothing? How does the larva conceal itself? The larva can cut through paper and cotton, yet sealing clothes in bags of paper or cotton protects them. Explain.
The house fly eats liquid sweets. It lays its eggs in horse dung. Describe its larval and pupal forms. Banishing horses from city would have what beneficial effect?
Describe the louse and its eggs, which are shown attached to a hair, natural size and enlarged.
Describe the bed bug. Benzine poured in cracks kills bed bugs. Do bed bugs bite or suck? Why are they wingless?
Describe the larva, f, pupa, g, and the adult flea, all shown enlarged. Its mandibles, b, b, are used for piercing. To kill fleas lather dog or cat completely and let lather remain on five minutes before washing. Eggs are laid and first stages passed in the ground.