544 



INDEX. 



452|, 454|, 460t, 463|, 467|, 

 469|, 488|. 



Daphnella, 452t, 471t. 

 Daphnia, 439f, 459|, 460f, 461t- 

 hyalina, 437|. 

 pulex, 467t. 

 Daphniidse, 471|. 

 Darluca, 168. 

 Datana angusi, 288, 298, 301, 312, 



320. 

 ministra, disease of, 258, 259, 



295-300. See under disease 



of Yellow-necked Apple 



Caterpillar. 



Day-flies, larvae, 463|, 484|. 

 De Candolle, A. P., Flore Franc. 



cited, 151. 



Decapoda, 469f, 47 It, 473|. 

 dentata, Allorchestes, 459|, 461 1, 



467t, 486-f. 

 Descriptive Catalogue of the North 



American Hepaticae, North 



of Mexico, 1-133. 

 Description of New Illinois Fishes, 



135. 



Desmodium, 160. 

 Detmers, H. J., 321. 



photographs by, 259. 

 Diabrotica vittata, 437|. 

 Diaptomus, 46l|. 

 Diatoms, 439|, 450|, 454|, 461|, 466|, 



471|, 491t. 

 Dicseoma, 178. 



Diedrocephala, mollipes, 437|. 

 Difflugia, 448|, 452|, 454|, 463f, 469|, 



473|, 490|. 

 Dilaena, 57. 

 Dineutes, 484|. 

 Dinobryon, 490f. 

 Diplolsena, 57. 



Diplophylluiu,104, 105, 107, 108, 125. 

 Diptera, 437|, 439|, 468t, 470|, 472|, 

 aquatic, 472|. 



larvae, 442|, 443t, 448t, 461 1, 



495|. 



aquatic, 468t,470t,483t. 

 terrestrial, 468|, 470|, 472t. 

 Dirt, 439-f. 



discoidea, Arcella, 45 1|. 

 Diseases of Insects, Studies on the 



Contagious, 257-321. 

 objects of investigating, 



260. 

 summary and conclusion, 



317. 



of Forest Tent Caterpillar, 315. 

 of Pieris brassica*, 267. 

 of Pieris rapoe, 259, 260, 282, 

 285, 294, 317. See Cabbage 

 Worm, European, 

 of Silkworm, 277-295. See Silk- 

 worm, Disease of. 

 of Walnut Caterpillar, 301, 320. 

 of Yellow-necked Apple Cater- 

 pillar, 295-300, 320. 

 artificial cultures, 298, 320. 

 characteristic bacteria, 21)6. 

 contagious character, 298. 

 description, 295, 320. 

 infection experiments 



with, 300, 320. 

 of Zebra Caterpillar, 305. 

 of plants and animals, 147. 

 Distillery refuse, 491f. 



slops, 438|, 44l|, 443|, 452|, 453t, 

 457|, 460|, 462| ? 469|, 471|, 

 4731-, 491-f. 

 Dog Fish, 463*. 

 Dogwood, injury to, by Forest Tent 



Caterpillar, 315. 

 Dorosoma, 435|, 464|, 480|. 



cepedianum, 437*, 439|, 468*|. 

 and Ambloplites rupestris, 



food of, compared, 498. 

 raptatorial teeth in early stage, 



496. 



Dorosomatidse, 437. 

 Dothidea, 217. 



Dragon -flies, larvae, 434|> 450|, 

 458|, 467|, 485-f. 



