102 ILLINOIS ACADEMY OF SCIENCE 



date. (Fig. 2). No attempt will be made to explain the ir- 

 regular course of the graph for the instrument at 2 meters. 



Summary : 



1. The results are too scanty to permit of any general- 

 izations. 



2. The evaporating power of the air in the Streator flood 

 plain forest within the medium strata of the foliage is about 

 double of that upon the surface of the soil beneath. 



3. The evaporating power of the air in the Palos Park 

 oak forest at a height of 6 meters, that is. in a medium strat- 

 um of foliage, is greater by 25 per cent than that just above 

 the surface while at the upper limit of foliage (13 meters) it 

 is 50 per cent greater than that just above the surface of the 

 soi\ 



Literature cited : 



(1) McXutt, W. and Fuller. G. D. The range of evapora- 

 tion and soil moisture in the oak-hickory forest association of 

 Illinois. Trans. 111. Acad. Sci. 5: 127-137. 1912. 



(2) Livingston, B. E.. Operation of the porous-cup at- 

 mometer. Plant World 13: 111-110. 1910.. 



DISTRIBUTION OF FISH IN THE STREAMS ABOUT 

 CHARLESTON, ILLINOIS. 



T. L. HAN KINSON. 



Introduction : 



The object of this paper is to give a list of the fish 

 known to occur in the streams about Charleston, Illinois, 

 with notes on their distribution, obtained by some ten years 

 of field work in the region by the writer. Use will also bel 

 made of data bearing upon fishes of these streams given in 

 the published work on the Fishes of Illinois by S. A. Forbes 

 and R. E. Richardson. The terminology and order of con- 

 sideration of species used by these writers will be followed 

 in this paper. The fish collections made by the writer and 

 from which the major part of the information here presented 

 was obtained, are all preserved in an accessible condition in 

 the zoology laboratory of the Eastern Illinois Normal school 

 at Charleston. The species determinations have been made 

 by the writer with the assistance of Mr. R. E. Richardson in 

 the case of some forms difificult to identify. For this and other 

 help given by members of the State Laboratory of Natural 

 History, the author is duly grateful. 



The streams, the fish life of which is to be considered. 



