Introduction -- Structure, development, and classification of insects and arachnids -- The feeding apparatus (and associated aspects of the digestive tract) -- Epidemiology -- Control of arthropods affecting man and animals -- Cockroaches, beetles, and orders of minor importance -- The bugs -- The lice -- Gnats, black flies, and related forms -- Mosquitoes -- Horse flies, deer flies, and snipe flies -- Muscoid flies and louse flies -- Myiasis -- Fleas -- Mites and mite-borne diseases -- Ticks and tick-associated diseases -- Venoms, defense secretions, and allergens of arthropods