DeRyke and Scott 11 



Lepomis pallidus Mitchill (bluegill). 

 81 mm. 14 Hyalella. 



80 mm. Stomach empty. 



98 mm. 12 tricoptera larvae and cases; 1 ceratopogon larva; small 

 amount of plant tissue. 

 Micropterus salmcides Lacepede (large mouth black bass). 

 110 mm. Cephalothorax of cray-fish 20 mm. long. 

 59 mm. 1 fish 29 mm. ; fragments of a neuropterus insect. 

 Etheostoma caprodes Raf. (log perch). 



81 mm. 14 Hyalella; 2 Tanypus; 3 Chironomus larvae; 1 macerated in- 



sect; small amount of plant tissue. 

 84 mm. 10 Hyalella; 2 Nematoda, parasitic; fragment of a large beetle. 



Collection 8 



August 7, 1919. Potamogeton, Chara; marl and soft peat; two and one- 

 half feet; turbid; clear; 2:30 p. m. ; seine. 



Fishes examined in this collection 



Lepomis pallidus Mitchill (bluegill). 



84 mm. 1 round worm; a small amount of plant tissue apparently 

 Potamogeton; 1 ephemerid larva; 1 odonatid nymph; 1 Dytiscus 

 larva (head) ; 2 chironomid larvae; 2 Physa; 3 water mites; 3 

 tricoptera larvae and cases; fragments of an odonatid larva and a 

 few algae filaments. 

 55 mm. Stomach empty. 



114 mm. 1 adult saw-fly (tenthredinidae) ; 10 Hyalella; 2 Ceratopogon; 

 2 ephemeridae larvae; 1 Spinitectus gracilis; 2 Chironomus larvae; 

 1 plecopteron nymph. 

 120 mm. 1 ephemerid larva; 1 tricopteron larva; the remainder of the 



stomach completely filled with Potamogeton tissue. 

 110 mm. 1 odonatid nymph; 5 ostracods; 6 Chironomus larvae; 1 hymen- 

 opteron; several small pieces of plant tissue. 

 Micropterus salmoides Lacepede (large mouth black bass). 



102 mm. 8 small fish, lengths 15 mm., 17 mm., 25 mm., 23 mm., 18 mm., 

 20 mm., 16 mm., 20 mm.; a mass of about 5 cc. of fish flesh; 12 

 Leuceruthrus micropteri. 

 55 mm. 2 fish, lengths 11 mm. and 20 mm. 



A 125 cmm. piece of fish flesh; Leuceruthrus micropteri. 

 A 216 cmm. of fish flesh; 5 trematodes, Leuceruthrus microp- 



2 fish, 2 mm. each in length. 



1 fish 27 mm. long; 3 Leuceruthrus micropteri; a small mass of 

 partially digested fish flesh. 



1 fish, length 18 mm.; 1 fish, length 12 mm.; 1 fish, length 20 

 mm.; 1 fish, length 30 mm. These fish are apparently bluegills. 15 

 trematodes (Leuceruthrus micropterus). 

 52 mm. 1 fish, partially digested, 12 mm. long; 1 trematode, Leuceruthrus 

 micropteri. 



