Report on the Rocky Mountain locust and other insects now injuring or likely to injure field and garden crops in the western states and territories . positnig eggs, in abt ai two weeks altti i^^huuig tiom the ground, andthus m about nfty days atter the egg is laid rhe oltspriug begius topropagate. The pupaVif tlie Colorado potato-beetle is represented atFig.—. It is formed in a little cavity which the larva had made per-fectly smooth and hard, and it is of the same color as the larva. Thebeetle on first emerging from it is quite pale and soft, without any mark-ings TACKAKu.] ENEMIES
Report on the Rocky Mountain locust and other insects now injuring or likely to injure field and garden crops in the western states and territories . positnig eggs, in abt ai two weeks altti i^^huuig tiom the ground, andthus m about nfty days atter the egg is laid rhe oltspriug begius topropagate. The pupaVif tlie Colorado potato-beetle is represented atFig.—. It is formed in a little cavity which the larva had made per-fectly smooth and hard, and it is of the same color as the larva. Thebeetle on first emerging from it is quite pale and soft, without any mark-ings TACKAKu.] ENEMIES OF THE COLOEADO POTATO-BEETLE. 727 Although no species of tliis family are known to be poisonous, yet itis ])robably true, from the facts adduced by Eiley and others, that thefumes arising- from the bodies of a large number of them when killed byhot water i)roduces sickness. This is due, perhaps, to a volatile poisonthrown off from their body immediately after death; but since fowl feedupon them to a large extent, and as no one has been known to have )oisoned, at least severely, in handling them, there is no reason whyhand-picking should not be resorted to. Enemiea of the Colorado jjotato-beetle.—Besides a number of bugs andbeetles which devour this beetle, a species of Lydella {L. dory2)horceIviley, Fig. 12) is very destructive to Eiley says, this fly destroyed fully10 per cent, of the second brood and oOper cent, of the third brood of ])otato-beetles that were in my garden. It bearsa very close resemblance, both in colorand size, to the common house-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectb, booksubjectinsects
