196 College of Forestry 
Hankinson (1908, p. 215) examined a few specimens from 
Walnut Lake, Mich., caught in April and found them to be 
feeding exclusively on midge larve or on filamentous alge. 
A specimen caught on May 21 had been feeding on midge 
larvee and entomostracans, but several specimens caught on 
the 22nd of May contained only midge larve. J. E. Reig- 
hard (1915, p. 239) records the Douglas Lake, Mich., darter 
as feeding in midsummer chiefly on midge larve and 
EKntomostraca. 
Three Tessellated Darters from Oneida Lake were exam- 
ined and their food found to consist of the following ratios: 
Youne. (36 mill. long). 
Crustacea. Entomostraca:. 2. .......:.5.5. SO Gpenicems: 
Plants. alli MS RRA RS GRAS ER ESS SONS 6 50 per cent. 
ADULT. (60-85 mill. long). 
Crustacea <Amphipoda;iete. 7. .. «cae oie ae 50 per cent. 
Insecta. Diptera ees sats Sey. ae ee oe 49 per cent. 
Moliiscase iGastropoda-.. cretpmmnca sa. ane eer 1 per cent. 
The data from which the above table was made is given 
below: (Collected in outlet at Brewerton, near Davison’s 
Landing, October 5 and 18, 1915, seined in shallow water.) 
No. 1. 85 mill. long. 
Crustacea. 1 Gammarus fasciatus .:.......... 15 per cent. 
2 Hyalella knickerbockeri ......... 10 per cent. 
15 Asellus aquaticus ...........:+.- 75 per cent. 
No. 2. 36 mill. Jong. 
Crustacea, (Cyclops vistrenwus 25... .5 2250s eee 50 per cent. 
Plants. HAUS 8 m5. folie. ene en eo aw Gusjendrevere aoe 50 per cent. 
No. 3. 60 mill. long. 
Mollisca sa AmnicolanlustTica, hse eee 2 per cent. 
Insecta. Chinonomidslatvee ace eee 98 per cent. 
The number of specimens examined is far too limited to 
permit of conclusions. The use of a large percentage of 
crustaceans together with the presence of Mollusca is the 
most notable feature. Regarding the use of the latter group 
of animals as food, it is interesting to read the observations 
of Jordan (1899, p. 29) who describes the food habits of 
i tet te 
