38 



HALF ITOUIIS WITH INSECTS. 



[Packakd. 



in their jaws and carry tliem to a place of safety in their 

 nests, if clanger threatens. 



The injury done by aphides is incalculable. The "Wheat 

 Fig. 25. aphis at certain seasons, 



when extremely abundant, 

 by its punctures, and the 

 consequent loss of sap, 

 causes the crop to dimin- 

 ish, the kernel being partly 

 remphigus. shrivelled and lessened in 



weigl^t. The leaves of the elm, apple tree and currant 

 are curled up, and the tree disfigured by them, while other 

 Fig. 213. Fig. 38. 



Larva of Syrphus. 

 Fig. 2Ga. 



Syrphus Fly, 

 Fig. 27. 



Lady-bird .and young. Aphis-eating Mite. 



forms (Pemphigus, Fig. 25) produce gall-like swellings on 

 leaves and the roots of trees. An instance where the same 



6 



