Index 



455 



Diplodia zeae, 194. 



Diptera, 418, 421, 422, 441, 442, 443, 

 444, 445, 446, 447, 448, 449, 450, 

 451, 452, 453, 454, 455, 458. 

 larvae and pupae, 459. 



Dobson, 457. 



Dogfish, 432, 434, 435, 543. 



Dorosoma cepediauum, 543. 



Dragon-flies, 456. 



Dragon-fly larvae (lacustrine), 544. 

 larvae and nymphs, 381, 382, 418. 



Dryopidae, 451, 452, 453. 



Dryopoidea, 458. 



"Duck shell," 350. 



Duckweed, 446. 



Dytiscidae, 442, 443, 445, 446, 453, 454, 

 455, 458. 



E 

 Eel, 434. 

 Elder, 15. 



Elm, 72, 73, 74, 85, 86, 88, 92, 112, 113, 

 116, 117, 118, 131. 

 American, 15. 

 Winged, 15. 

 Elodea, 449, 455. 

 Enallagma, 456. 



antennatum, 445, 450. 

 exsulans, 445, 451. 

 sp., 447, 449, 450, 451. 453. 

 Enochrus, 441, 457. 



ochraceus, 445, 446, 449, 455. 

 Entomostraca as food of fishes, 538, 

 539, 547. 

 of insects, 548. 

 of other crustaceans, 548. 

 as sustenance for bladderworts, 548. 

 food of, 438, 533. 



inferior development in lakes, 546. 

 lacustrine, 545, 546. 

 Ephemera sp., 450, 456. 

 Ephemerella sp., 448, 456. 

 Ephemerid larvae (lacustrine), 544. 

 Epheraerida, 392, 417. 418, 420, 421, 

 442, 443, 445, 446, 447, 448, 449, 

 450, 451, 452, 453, 454, 456. 

 naiades, 459. 



Ephemeridae, 379, 381. 443, 445, 446, 

 447, 448, 449, 450, 451, 452, 453, 

 456. 

 Epiaeschna, 456. 



heros, 451. 

 Epicordulia princeps, 420. 

 Epiurus sp., 16. 

 Erimyzon sucetta, 543. 

 Eriocera sp., 452, 453, 459. 

 Erioptera sp., 441, 459. 

 Eristalis, 440, 458. 



tenax, 440. 

 Erpobdella punctata, 348, 361, 373, 415. 

 Erysiphe graminis, 190. 



polygoni, 204. 

 Erythroneura, 39. 

 abolla abolla, 40. 

 accensa, 40. 

 varia, 40. 

 aclys, 41. 



basilaris basilaria, 42. 

 comes amanda, 44. 

 comes, 42. 

 compta, 43. 

 elegans, 43. 

 palimpsesta, 43. 

 reflecta, 43. 

 rubra, 43. 

 rubrella, 43. 

 rutomaculata. 43. 

 vitifex, 42, 43. 

 ziczac, 44. 

 dentata, 40. 

 hartii. 42. 



illinoiensis illinoiensis, 41. 

 infuscata, 42. 

 ligata allecta, 42. 

 ligata. 42. 

 pupillata, 42. 

 lunata, 39, 41. 

 maculata era, 42. 

 maculata, 42. 

 osbornl, 42. 

 mallochi, 41. 

 morganl, 41. 

 obliqua, 39. 

 dorsalis, 40. 



