LIST OF REFERENCES 199 



Watermites 



Soar, C. D., and Williamson, W. (1925). The British Hydracarina. 

 London. (Ray Society Publications.) 

 Only the first volume is out at present. 

 There are no convenient works on land mites, spiders, or myriopods. 



Insects 



Imms, a. D. (1925). A general textbook of entomology. London. 

 An excellent work for general information and reference. 



Coleoptera. 



Fowler, W. W. (1887-1914). The Coleoptera of the British Islands. 



London. 



Six volumes. There are a number of later additions in various 



periodicals. 



Hemiptera. 



Saunders, E. (1892). The Hemiptera-Heteroptera of the British Isles. 

 London. 



Primarily a systematic work. 

 Butler, E. A. (1923). A biology of the British Hemiptera-Heteroptera. 

 London. 



This is biological rather than systematic, but brings up to date the 

 systematic work which was done after the publication of Saunders' 

 book. 

 Edwards, J. (1896). The Hemiptera-Homoptera (Cicadina and Psyllina) 



of the British Isles. London. 

 Davidson, J. (1925). A list of British Aphides. London. 



Gives all references to the food plants of British species. 

 Chrystal, R. N., and Storey, F. (1922). The Douglas Fir Chermes 

 (Chermes cooleyi). Forestry Commission Bulletin No. 4. London. 

 Gives keys to all British species of Chermes. 

 Newstead, R. (1901). A monograph of the Coccidae of the British Isles. 

 London. (Ray Society Publications.) 



Hymenoptera. 



Donisthorpe, H. St. J. K. (1927). British Ants. London. 



Sladen, F. W. L. (1912). The humble bee and how to domesticate it. 



London. 

 Saunders, E. (1896). The Hymenoptera-Aculeata of the British Isles. 



London. 

 Stellwaag, F. (1921). Die Schmarotzer-wespen als Parasiten. Mongr. Z, 



Angew. Entomologie, No. 6. 

 SwANTON, E. W. (1912). British Plant-Galls. London. 



This deals mostly with the Cynipida, but also includes galls formed 



by mites and flies. 

 Morice, F. D. Help-notes towards the determination of the British 



Tenthredinids, etc. A series of papers on sawflies scattered through 



the Entomologist's Monthly Magazine, from 1903 onwards. 

 Morley, C. (1903). The Ichneumons of Great Britain. Plymouth. 



For looking up biological facts about ichneumons : it is inadvisable 



to attempt identification of these insects, since it is a difficult and 



tricky process. For this reason, no references are given in this list 



to the other parasitic hymenoptera. 



