544 



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

 469t, 488t. 



Daphnella, 452t, 471t. 

 Daphnia, 439t, 459t, 4B0t, 461t. 

 hyalina, 437t. 

 pulex, 467t. 

 Daphniidse, 4711. 

 Darluca, 168. 

 Datana angusi, 288, 2i)8, 301, 312, 



320. 

 ministra, disease of, 258, 259, 



295-300. See under disease 



of Yellow-necked Apple 



Caterpillar. 

 Day-flies, larvte, 4(33t, 484t. 

 De Candolle, A. P., Flore Franc. 



cited, 151. 

 Decapoda, 4»i9t, 47 If, 473t. 

 dentata, AUorchestes, 459t, 4611, 



467t, 486t. 

 Descriptive Catalogue of the North 



American Ilepatica?, North 



of Mexico, 1-133. 

 Description of New Illinois Fishes, 



135. 

 Desmodium, 160. 

 Detmers, H. J., 321. 



photographs by, 259. 

 Diabrotica vittata, 437t. 

 Diaptomus, 46lt. 

 Diatoms, 439t, 4.50t, 4o4t, 461t, 4661, 



471t, 4911. 

 Dicseoma, 178. 



Diedrocephala, moUipes, 437t. 

 Diffiugia, 4481, 452t, 4541, 463t, 469t, 



473t, 490t. 

 Dikena, 57. 

 Dineutes, 484t. 

 Dinobryon, 490t. 

 Diplohena, 57. 



Diplopliyllum,104, 105, 107. 108, 125. 

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

 aquatic, 472|. 



larva% 442t, 443t, 448t, 461t, 

 495t. 

 aquatic, 468t, 470t, 483t. 

 terrestrial, 468t, 4701, 472t. 

 Dirt, 439t. 



discoidea, Arcella, 451t- 

 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 rapa?, 259, 260, 282, 

 285, 294, 317. See Cabbage 

 Worm, European, 

 of Silkworm, 277-295. See Silk- 

 worm, Disease of. 

 of Walnut Caterpilhir, 301, 320. 

 of Yellow-necked Apple Cater- 

 pillar, 295-300, 320. 

 artificial cultures, 298, 320. 

 characteri.stic bacteria, 296. 

 contagious character, 298. 

 description, 295, 320. 

 infection experiments 

 with, 300, 320. 

 of Zebra Caterpillar, 305. 

 of plants and animals, 147. 

 Distillery refuse, 4911- 



slops, 438t, 44 It, 443t, 452t, 433t, 

 457t, 4601, 4621, 469t, 471t, 

 473t, 491t. 

 Dog Fish, 463*. 

 Dogwood, injury to, by Forest Tent 



Caterpillar, 315. 

 Dorosoma, 435t, 464t, 480t. 



cepedianum, 437*, 439t, 468*t. 

 and Ambloplites rupestris, 

 food of, compared, 498. 

 raptatorial teeth in early stage, 

 496. 

 Dorosomatidte, 437. 

 Dothidea, 217. 



Dragon - flies, larvai, 434t, 4501, 

 458t, 467t, 4851. 



