Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomolo00smit Year: 1906 THE IXSECT WORLD. 341 Fig undersized, chunky flies, dark in color, with the thorax well developed and somewhat produced forward so as to partially conceal the small head from above. Though the head is small in proportion to the insect, the mouth parts are exceedingly well developed and furnished with a formidable array of lancets for puncturing and blood-sucking. They belong to the natural family Simu- li
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomolo00smit Year: 1906 THE IXSECT WORLD. 341 Fig undersized, chunky flies, dark in color, with the thorax well developed and somewhat produced forward so as to partially conceal the small head from above. Though the head is small in proportion to the insect, the mouth parts are exceedingly well developed and furnished with a formidable array of lancets for puncturing and blood-sucking. They belong to the natural family Simu- liidce, and are distinguished, in addition to the peculiari- ties enumerated above, by short, broad wings, in which the venation is almost obso- lete, except along the front margin. The larvae are curious little creatures, living under water in rather swiftly flowing streams, clinging to rocks, sticks, or logs, and feeding upon vegetable matter. They are furnished with sucker-hke structures at both extremities, by means of which they cling- to their resting-place, and move from place to place, breathing by means of tracheal gills. In favorable localities these insects may develop in enormous numbers, and, flying in the bright light of mid-day, attack any warm-blooded animal that comes in their way. Such is their number sometimes that they completely cover the animal at- tacked, first rendering it frantic by the pain inflicted and soon after weak from the loss of blood. Eventually death ensues, whether the animal be a man or a mule, unless repellents are employed or a rapid retreat out of the infested territory is accomplished. Where the insects breed in shallow streams, the larvae attached to stones, nothing can be done to check development, and the mixture already recommended for mosquitoes—viz., oil of tar. Buffalo-gnat.
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