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tntumn, from which the complete ihcct liberated in the following spring.

The larva of the smaller species are very inurious to different kinds of esculent vee

tables, particularly turnip'. Mr. Marshall, the

agriculturist, has collected a number of curious thcts relative to that destructive kind, specift caUy named the Turnipfly. From the tcsti .mouy of fishermen, and others with whom he conversed, who had been long resident on the coast of Norfolk, there scenis no doubt that they emigrate in the fly state, in countless mule .ions, from sonic distant couairy probably the north of Europe, across the ocean, bela

varded in their progress by a uorthcast winds They nrrve in clouds, nrc supposed to rest occasionally an the surfitce of the water, and

re frequently seen lying in shoals on the beach, in an exhausted condition, from which they are revived by the warmth of the sun. The appearance of the black canker, as they are popularly called, justly alarms the farmer with an omen of destruction to his crop of turnips, unless the rooks befriend him, or he is able to thin the numbers of the caterpillars, by regaling his ducks with them. The parent fly inserts her eggs, by means of her sawed tube, in the fleshy part of the turnip-leaf: they hatch in about ten days The young cater

pu tars