468 Illinois State Laboratory of Natural History. 



FOOD OF SMALLER FAMILIES.* 



[n'umber of 

 Specimens Examined. 



10 



Kinds of Food. 



Ratios in which each Element of Food was found. 



ANIMAL FOOD 



I. Batraciiia (tadpoles) 



II. Fishes 



Cycloid 



Acanthopteri 



Perca lutea 



Centrarchinre 



Micropterus 



Pomoxys 



Gambusia patruelis 



Coregonus 



Dorosoma cepedianum . 



Hyodon 



Cypnnidte 



Catostomatidie 



III. MOLLIISCA 



1. Univalves 



Vivipara 



2. Bivalves (Sphserium). 



IV. Insecta 



Terrestrial 



Aquatic 



1. Hymenoptera 



Myrmicidse 



2. Lepidoptera 



3. Diptera 



Terrestrial 



Tipulidse 



Aquatic larvse 



Corethra 



Chironomidse 



4. Coleoptera 



Terrestrial 



ChrysomelidtB 



Aquatic 



Pytiscidiie 



llydi-opliilidfe 



5. Iltmipteni 



1.00 



.10 



1.00 



!98 

 .09 

 .23 



.21 

 .03 

 .69 



.46 

 .0.5 

 .03 

 .03 



.02 

 .02 



1.00 

 .13 

 .52 

 .11 

 .11 



.11 



.04 



.09 



+ 



.35 

 ."29 



+ 



1.00 

 .07 

 .75 

 .10 

 .17 



.16 

 .02 

 .04 

 .02 



.23 



.03 



.06 



.01 



+ 



+ 



.18 

 '.lb 



+ 



1.00 



.02 

 .02 

 .02 



.11 



.04 



+ 



+ 



1.00 



1.00 



.67 



+ 



1.00 



1.00 

 .64 

 .36 

 + 



+ 

 + 

 + 

 + 



+ 

 + 

 + 

 + 

 + 

 + 

 + 



1.00 



.04 



+ 

 .24 



.07 

 .06 

 .17 

 .02 



.02 



.01 



.01 



.01 



+ 



1.00 



'.'67 



.50 



+ 



1.00 



i!66 



.25 



.20 



1.00 



'.'83 



.38 



,10 



* The sign -\- indicates a ratio not estimated. 



