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Three Ichneumon-Wasps. 



[E. Step, F.L.S. 



The upper photogriph is of one of our largest ichneumons, the yellow ophion, which is verv destructive to the caterpillars of the puss-moth. 

 Only one egg is laid in a caterpillar. The winged Insect often conies into houses at night, attracted by light. Below, to the left, is a smaller 

 species of the same family, just issued from its cocoon, spun in the empty skin of its victim. On the right are two of a large number of cocoons 

 spun by grubs that had destroyed a large sawfly-caterpillar. One of'the ichneumons escaped from a cocoon is also shown. .Ml magnified 

 about three and a half times. 



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