Annual Report for 1911 of the Zoologist. 381 



geological maps, that one- can rarely be sure of the type of soil 

 to be dealt with. Moreover it is difficult to describe soils with 

 sufficient accuracj^ for the purpose. Members requiring 

 assistance of this nature should, wherever possible, send either 

 a turf cut from an adjoining held or a bunch of flowering 

 specimens of all the grasses that can be found in it. Either of 

 these afford sufficient indication of the grasses which will grow 

 in the locality, and suitable pi*escriptions can then be drawn up 

 economically. Representative turves cut from fields requiring 

 treatment will also afford much useful information as to the 

 desirability of draining or applying lime, slag, or other artificial 

 manures. 



At the beginning of the year 1911 a grant of 5()Z. was made 

 to the Botanical and Zoological Committee to help defray the 

 expenses of an examination of the micro-flora of certain of the 

 Woburn plots. The investigations are being carried out in 

 the laboratories at the School of Agriculture at Cambridge. 

 Bacteriological analyses have so far been made of the soils 

 of the tare and mustard plot, and of the ammonium sulphate 

 plots, with and without lime. A detailed study of the fungi 

 present in the latter plots is also being made, particularly with 

 reference to the effects of their presence on the total nitrogen 

 content of the soils. 



Investigations on the flora of each of the manurial plots 

 are being continued. 



R. H. BiFFEN. 

 School of Agriculture, 

 Cambridge. 



ANNUAL REPORT FOR 1911 OF THE 

 ZOOLOGIST. 



Contents. 



PAGE 



Forest Tree Pests 382 



Corn and Grass Pests .38.3 



General Farm and Garden Crop Pests ... 384 



Animal Parasites 38-1 



Fruit Pests 384 



Miscellaneous Pests SSC 



The unusual weather conditions of the past season had a marked 

 effect on the work of the Zoological department. During the 

 spring and early summer complaints of insect attack were very 

 frequent. In June alone the applications for advice referred 

 to about thirty different pests, several of them occurring 



