206 College of Forestry 
Needham found the food to vary with age in the manner 
that has already been described. It is evident that these sun- 
fishes had not quite reached the mollusk-eating stage. 
Group 1. Infancy. 18-25 mill. long. 8 specimens examined. 
Insecta. Midge larve. Abundant in 1. 
Crustacea, Copepoda, abundant in 7. 
Cladocera, 3 specimens in 3 fish, jragments in 
2 fish. 
Ostracoda, 1 specimen. 
Acarina. Water mites, 2 specimens in 2 fish. 
Group 2. Youth. 50 mill. long. 9 specimens examined. 
Insecta. Midge larve and pups, 24 in 8 fish. 
Caddis-fly larve, 1 in 1 fish. 
May-fly nymphs, 6 in 5 fish. 
Crustacea. Copepoda, abundant in all fish. 
Cladocera, 3 and fragments in 5 fish. 
Ostracoda, 1 in 1 fish. 
Acarina. Water mites, 5 in 4 fish. 
Mollusea. Snails (Lymnea), 4 in 4 fish. 
Grove 38. Young. 75 mill. long. 8 specimens examined. 
Insecta. Water strider, 1 in 1 fish. 
Beetles, 3 in 2 fish. 
Caddis-fly larvee, 4 in 2 fish. 
Midge larve, 12 in 6 fish. 
May-fly nymphs, 16 in 2 fish. 
Dragon-fly nymph, 1 in 1 fish. 
Crustacea. Copepoda, fragments in 1 fish. 
Cladocera, abundant in 1 fish. 
Mollusea. ‘Snails, 20 in 1 fish. 
Plants. Algee, fragments in 2 fish. 
Amewurus nebulosus (LeSueur). Common Bullhead. 
Needham (1908, a, p. 178) also examined 25 specimens 
of the Common Bullhead, caught July 10, 1905. All were 
adults, the smallest being about 8 inches in length. None 
were mollusk eaters. The results of these examinations is 
shown below: 
Pisces. Sunfish, 17 eaten by 14 bullheads. 
Horned Dace, 7 eaten by 4 bullheads. 
Unidentifiable fish, 3 eaten by 3 bullheads. 
Insecta. AEschnide nymphs, 6 eaten by 6 bullheads. 
Libellulide nymphs, 2 eaten by 2 bullheads. 
May-fly nymphs, 1 eaten by 1 bullhead. 
Crustacea. Crawfish, fragments eaten by 3 bullheads. 
Plants. Alge, eaten by 4 bullheads. 
Silt. In stomach of 4 bullheads. 
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