RECENT LITERATURE. 167 



pose ; the result is, however, a good representation of the insect at one 

 stage of its existence. 



We should have liked the proper names of each species to have 

 heen at least as prominent as the English names. Doubtless this is 

 a feature in which our author has had to conform to the real or sup- 

 posed requirements of the public he is addressing; and since there 

 obviously does exist a public that makes such a book possible, we can 

 only accept with them their admitted prejudices. 



Taking the book altogether, and making every allowance for in- 

 evitable inequalities, we do not know any work — not excepting the 

 most expeusive — yet issued on British butterflies that gives so full and 

 accurate an account of them in all their stages. Indeed, we wonder 

 how such a book can be offered at the price. It is excellently got up ; 

 the beautiful photograph, inside the cover, of Ccenonniypha paviiihilns 

 at rest is almost worth the money. TAT 



Flies and Ticks as Agents in the Distribntion of Diseases. (From 'The 

 Proceedings of the Association of Economic Biologists.') By 

 F. V. Theobald, M.A. 1905. Pp. 10. 

 A VERY useful paper, giving a synopsis of diseases having a similar 

 origin to malaria, and of the small animals — flies, ticks, &c. — con- 

 cerned in the propagation of such diseases. 



W. J. L. 



Report of Economic Zoology (1905). (South-eastern Agricultural 

 College, Wye.) By F. V. Theobald, M.A. 

 In this particularly interesting and useful report of more than one 

 hundred and twenty pages, with a very large number of illustrations 

 contained in no less than forty-four figures, we see the result of a year's 

 work that falls on the shoulders of Mr. Theobald at the important 

 centre of agricultural study at Wye in Kent. Many of the very 

 numerous foes (and friends), considered more or less fully according 

 to circumstances, are insects ; but we find besides, parasitic worms, 

 molluscs, mice, and voles. There are also a few answers to extra- 

 British enquiries. This notice is somewhat late in appearing, and we 

 are looking forward to a new report of equal interest. 



W. J. L. 



A Preliminary List of Durham Biptera, with Analytical Tables. By the 

 Eev. W. G. WiNGATE. Pp. i-vi, 1-416 ; plates i.-vii. Additions 

 and corrections, 8 pp. London : Williams & Norgate. New- 

 castle-upon-Tyne : F. & W. Dodsworth. 1906. 

 This very useful work forms volume ii. (new series) of the ' Trans- 

 actions ' of the Natural History Society of Northirmberlaud, Durham, 

 and Newcastle-upon-Tyne. The title it bears very inadequately con- 

 veys the actual scope and general value of the book. Practically it is 

 an excellent guide to British Diptera, with the addition of localities for 

 the six hundred odd species which the author had so far observed in 

 Durham, and chiefly in the southern half of the county. There are 

 numerous tables of genera and species, and these, in conjunction with 



