172 Review 



supporting Quanjer's hypotheses and in opposition to them are expressed 

 by the several investigators. J. Feytaud contributes a paper describing 

 the effect of variations of temperature, humidity, etc. on the Eudemis 

 and the Cochylis in the Bordeaux region in 1918 and 1919. In pp. 339- 

 370 P. Vayssiere gives an interesting general account illustrated by eight 

 plates of the insect pests of cultivated plants in Morocco, together with 

 notes on Insecticides. Three short papers by R. Regnier describe the 

 entomological research station at Rouen, the damage to Poplar trees 

 caused by the leaf hopper Idiocerus populi; and the destructive activities 

 of various species of Corvus in Normandy. Short accounts are given of 

 some biological observations on the olive fly {Dacus oleae) and its parasites 

 by R. Poutiers and L. Turinetti, and of the successful employment of 

 chlorpicrin as an insecticide by P. Schindler and B. Trouvelot. There 

 are also papers on fungus diseases of apricots by J. Chifflot and on 

 Fusariose and two other diseases of the melon by J. Dufrenoy. The 

 volume is well produced and is a fine record of work done. 



w. B. B. 



