LEAF-MINING INSECTS 



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PLATE 3 



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Hymenopterous Leaf-Mixers 



(Photographs by Dr. R. Matheson) 

 Fig. 1. A leaf of dewberry bearing mines of the sawfly, Metallus 



Fig. 2. A spray of purselane bearing mines of Schizocerus Zabriskei. 

 Fig 3 One leaf from the same, more enlarged. 



Fig. 4. Portion of a birch leaf bearing within a mine a hibernating co- 

 coon of the sawfly, Schizocerus mathesoni? 



