Lijst van geraadpleegde literatuur. 
(Vervolg). 
. Jour R. Marroca. A preliminary classification of Diptera, 
exclusive of pupipara, based upon larval and pupal 
characters, with keys to imagines in certain families. 
Part I. In: Bull. of the Illinois State Laboratory of 
Natural History. Vol. XII, Art. III, March 1917, Urbana, 
Illinois. 
. H. Garman. A preliminary study of Kentucky localities 
in which pellagra is prevalent. Kentucky agricultural 
experiment station of the State University. Bulletin 
No. 159. January 1912. Lexington, Kentucky. 
. H. B. Warp and G. C. Wareere. Fresh water biology. 
1918, New-York and ‘London. Joan Wer and Son. 
L. C. Matt, The natural history of aquatic insects. 
1912, London, Mac Mia and Co. Ltd. 
