424 



MEDICAL ENTOMOLOGY 



the head to free the anterior attachment, as by doing so the gut is kept 

 straight. If circumstances permit it is advisable to starve the larvae for 

 a short time before dissecting them, in order to have the gut as empty as 

 possible. In dealing with aquatic larvae, such as those of mosquitoes, 

 this is done by keeping them in clear water. 



Almost all the above dissections can be carried out without a dissecting 

 microscope, especially after a little practice and some practical instruc- 

 tion, but a dissecting microscope renders the task so much easier that it 

 is well worth the small cost and the trouble of transport. A watch- 

 maker's eyeglass is very useful. 



IMPORTANT LITERATURE ON THE BLOOD-SUCKING DIPTERA. 



GENERAL 



BRAUER and vox BERGENSTAMM. Die Zweifliiger d. k. Museums zu Wien, 1880 to 1894. 



A somewhat rare work, dealing with the classification 

 of Diptera. 



GRIINRERG, K. 



JOHANNSEN, O. A. 



KING, H. H. 



LEFROY, II. MAXWELL. 

 SHARP, D. 



SCHINER, J. R. 



WiLLISTON, S. W. 



Die Blutsaugenden Diptera. Jena, 1907. A well- 

 illustrated account of the tropical African flies. 



Aquatic Nematocerous Diptera in New York State, 

 New York State Museum. Bulletin No. 68. Deals 

 very fully with all the common forms, especially 

 Si-ntulium. The bibliography is fairly complete. 



Note on an Entomological Store-box suitable for use in 

 the Tropics. Bulletin of Entomological Research, 

 vol. iv, part I, 1913. The box mentioned in this 

 note only differs from that described by the authors 

 (page 415) in that the top and bottom is of three-ply 

 wood, and the cork mat is held in position by glue ; 

 in Madras the authors have not experienced the 

 difficulties met with by King in Khartoum. 



On the Collecting and Preserving of Insects. Parasi- 

 tology, vol. iv, page 174, 1911. 



Diptera, Chapter VII in Cambridge Natural History- 

 Insects, Part 2, 1901. A good general account of 

 the order, useful as an introduction to the study of 

 the blood-sucking forms. 



Fauna Austriaca. Die Fliegen Oesterreichs, 2 vols., 

 1862. A standard work on systematic dipterology ; 

 can still be obtained. 



Manual of the North American Diptera, third edition, 

 1908. Wm. Wesley & Son, 28 Essex Street, Strand, 

 London. Deals with the external structure and 

 classification of the diptera ; all the families and the 

 North American genera. An indispensable book, 



