Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomolo00smit Year: 1906 AN ECONOMIC ENTOMOLOGY. more than likely there is also a sense of hearing connected with them. In some of the nocturnal moths they are broadly feath- ered or pectinated, much more prominently in the male than in the female. It is believed that the reason for this is that the insects are compelled to find their mates entirely by the sense of Fig. 7. Tip of the mouth of a lapping fiy, showing the pseudo-trachea on the inner face of the l
Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomolo00smit Year: 1906 AN ECONOMIC ENTOMOLOGY. more than likely there is also a sense of hearing connected with them. In some of the nocturnal moths they are broadly feath- ered or pectinated, much more prominently in the male than in the female. It is believed that the reason for this is that the insects are compelled to find their mates entirely by the sense of Fig. 7. Tip of the mouth of a lapping fiy, showing the pseudo-trachea on the inner face of the lips. Much enlarged. smell. That it is not food they seek is proved by the fact that where these feelers are most developed the mouth i)arts are often entirely aborted and the insect takes no food at all. Certain 'carrion beedes,' also nocturnal in habit, are attracted for long distances to their food, and, even where purposely hidden, they find it without difficulty ; proving that the sense of smell alone is used. It may be convenient to consider here a few of the com-
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