POOD OF THE SHORE FISHES OP CERTAIN WISCONSIN LAKES. 26l 



Fundulus diaphanus menona (Jordan and Copeland). Menona top minnow. 



Data for 1914 (Pearse, 1915). — Number examined, 49. Length: Maximum, 49.5; minimum, 27.5; 

 average, 35.4. Food: Dipterous larvae, 6.1; beetle larvse, 0.6; hemipterous larvae, 0.7; dragon-fly 

 nymphs, +; May-fly nymphs, 1.7; podurans, +; insects, 3.2; mites, i; Hyalella, 16.2; ostracods, 

 25.2; copepods, 1.2; cladocerans, 27; Planorbis, o.i; plant remains, o.i; WolSia, 14.7; filamentous 

 alg£, O.I. 



Station 17; December 3; number examined, i. Length: 37. Food: Chironomus viridicollis 

 larvas, s; C. viridis larvse, 5; Chydorus sphsericus, 10; Ceriodpahnia, 40; Eurycercus lamellatus, 40. 



Summary. — Food: Chironomid larvae, 10; cladocerans, 90. 



Station 19; December 3; number examined, i. Length: 38. Food: Cricotopus trifasciatus 

 larvse, 92 ; Hyalella, 8. 



Station 17; April 6, 1915; number examined, 10. Length: Maximum, 42.1; minimum, 27.9; 

 average, 31.6. Food: Dipterous larvae, 7; Chironomus tentans larvae, 5.8; C. fulviventris larvae, 10; 

 C. decorus larvae, 8; Corethra larvae, 6; adult Diptera, 14; ostracods, 6.5; Cyclops, 5.3; Canthocamptus, 

 2.5; Chydorus sphaericus, 4; oligochaetes, 14.3; nematodes, 0.2; unknovra eggs, 10; plants, 0.2; algae, 

 3; fine debris, 3. 



Summary. — Food: Dipterous larvae, 36.6; adult Diptera, 14; ostracods, 6.5; copepods, 8; cladoc- 

 erans, 4; oligochaetes, 14.3; nematodes, 0.2; imknown eggs, 10; plants, 3.2; fine ddbris, 3. 



Station 17; April 13; number examined, 4. Length: Maximum, 45.3; minimum, 30; averse, 

 39.5. Food: Chironomid larvae, 5; Chironomus fulviventris larvse, 0.5; C. decorus larvae, 0.9; C. 

 lobiferus larvae, 14.2; ostracods, 15.5; Cyclops, 9.2; Canthocamptus, 3.7; Ceriodaphnia, -f; oligo- 

 chaetes, 3.7; nematodes, 1.2; plant remains, 4.2; Wolffia, 10.7; algae, 1.5; fine ddbris, 29.2. 



Summary. — Food: Chironomid larvae, 20.6; ostracods, 15.3; copepods, 12.9; oligochsetes, 3.7; 

 nematodes, 1.2; plants, 16.4; fine dfebris, 29.2. 



Station 21; April 28; number examined, 10. Length: Maximum, 46; minimum, 27; average, 38.6. 

 Food: Young fish with yolk sacs, 6.9; chironomid larvse, 0.6; Chironomus fulviventris larvae, 3.6; C. 

 flavus larvae, 2 ; Tanypus decoloratus larvse, 0.8; Tanytarsusexiguus larvae, 2; T. dives larvae, 2; Ortho- 

 cladius sp. larvae, 0.4; O. nivoriiindus larvae, 4; Palpomyia longipennis larvae, i; Tabanus larvae, i.i; 

 podurans, 0.7; midges, 9.2; Dikerogammarus fasciatus, 19.7; Cyclops, 3.1; Canthocamptus, 1.3; Sphae- 

 ridse, 4; oligochaetes, 1.5; eggs, i.i; plant remains, 7.2; fine dfebris, 17. i. 



Summary. — Food: Dipterous larvae, 17.5; adult insects, 9.9; amphipods, 19.7; copepods, 4.4; 

 Sphaeridae, 4; oligochaetes, 1.5; eggs, i.i; plants, 7.2; fine debris, 17.1. 



Station 21, along shore of Lake Wingra; April 28; number examined, 10. Length: Maximum, 

 39; minimum, 33; average, 38. Food: Tanypus decoloratus larvae, 0.3; T. d. pupse, 16; Cricotopus 

 trifasciatus pupae, i; adult Diptera, 0.5; terrestrial mites, 1.4; ostracods, 46.5; Cyclops, 15.7; Cantho- 

 camptus, 1.5; Chydorus sphaericus, 5.1; Eurycercus, 8.1; nematodes, 0.3; algae, 3.5. 



Summary. — Food: Dipterous larvae, 0.3; dipterous pupae, 17; adult insects, 0.5; mites, 1.4; ostra- 

 cods, 46.5; copepods, 17.2; cladocerans, 13.2; nematodes, 0.3; algae, 3.3. 



Station 5; May 12; number examined, 10. Length: Maximum, 59; minimum, 34; average, 47.4. 

 Food: Fish eggs, 4.5; Cricotopus trifasciatus larvae, 4.4; Chironomus viridis larvae, i; C. viridicollis 

 larvae, 5.6; Tanypus decoloratus larvse, 2.2; Pelopia monilis larvae, i; Orthocladius sordidellus larvae, 

 2.3; Probezzia pallida larvae, 0.1; Csenis diminuta nymphs, 6.4; May-fly nymphs, 0.5; Orthocladius 

 sordidellus pupae, 2.4; Tanypus decoloratus pupae, 0.8; CoUembola, 0.5; midges, i; terrestrial mites, 

 0.8; Hyalella, 3.5; ostracods, 26.2; Cyclops, 5.8; Chydorus sphaericus, 21.2; Eurycercus lamellatus, 

 2.9; Sphaeridae, i; Planorbis, 1.2; plant remains, 0.7; algae, 1.3; fine debris, 0.5. 



Summary. — Food: Fish eggs, 4.5; insect larvse, 20.1; pupae, 3.2; adult insects, 1.5; mites, 0.8; 

 amphipods, 3.5; ostracods, 26.2; copepods, 5.8; cladocerans, 25.1; molluscs, 2.2; plants, 2; fine de- 

 bris, 0.5. 



Station 16; May 15; number examined, 8. Length: Maximum, 52; minimum, 32; average, 39.5. 

 Food: Helea larvae, 2; Cricotopus trifasciatus larvae, 20.7; Tanypus decoloratus larvae, 0.5; Ortho- 

 cladius sordidellus larvae, 5.5; Palpomyia larvae, 5; Csenis diminuta nymphs, 2.1; Cricotopus trifas- 

 ciatus pupae, s; mites, 3; ostracods, 7; Cyclops, 18.5; Chydorus sphaericus, 2; Pleuroxus procurvatus, 

 1.5; Planorbis, 11. 7; oligoch^tes, 12; plant remains, 0.2; algae, 0.1. 



Summary. — Food: Insect larvae, 35.7; pupae, 5; mites, 3; ostracods, 7; copepods, 18.5; cladoc- 

 erans, 3.5; snails, 11. 7; oligochaetes, 12; plants, 0.3. 

 104848°— 18 3 



