538 



INDEX. 



Physa heterostropha — Cont'd. 



eggs of, 150. 

 Physoplia erassiconiis, 458. 



intermedia, 451). 



media, 459. 



nigrata, 458, 459. 

 Pickerel, 140. 



Little, 141, 



Frog, 325. 

 pickeringi, Hyla, 340,.348. 

 pickeringii, Hylodes. 348. 

 picta, Carynota, 442, 444. 



Chrysemys, 185, 215, 223, 225, 220. 



Emys, 226. 



Mamestra, 2. 



Salamandra, 358. 



Stephania, 173. 



Testudo, 22(). 



Umbonia, 459. 

 pictipennis, Bolbonota, 469. 



Monecphora, 485. 



Tomaspis, 485. 

 pictiim, Phalangium, 95. 

 pictiis, Oligolophus, 95. 

 pieridis, Microgaster, 4. 

 pieridivora, Microgaster, 4. 

 Pieris rapse, parasites of, 4. 

 Pike. 140. 



Wall-eyed, 137. 

 Pikes, 140. 



pilosa, Polyglypta, 394. 

 Pilot Snake, 28t), 290. 

 food of, 291. 

 Pimephales notatus, 143. 

 Pimpla, 39. 



minuta, description of imago, 4 1 . 

 parasite of Teras minuta, 41. 

 Pine-tree Lizard, 250. 

 food of, 252. 

 pipiens, Rana, 188, 319, 321, 322. 324, 



32f), 328. 

 Piping Tree-frog, 3 is. 

 piseivoriis, Agkistrodon, 1S7. 



Ancistrodoii, 313, 315, 31f). 



Crotalus. 315. 



To.xicophis, 315. 



Trigouocephalus, 315. 



Pituophis bellona, 287. 



catenifer. 286. 

 Pityophis, 263, 286. 



catenifer, 286. 



var. bellona, 287, 288, 289. 

 var. catenifer, 286. 

 var. sayi, 287, 288, 289. 



sayi, var. sayi 287. 

 plagiata, Proconia, 15. 

 Planorbis trivolvis, 1.50. 

 Plant-lice, 171. 



platineum, Amblystoma, 372, 373. 

 Platycentrus, 473. 



aeuticornis, 473. 



obtusicornis, 473. 

 platycerus, Centrotus, 476. 

 Platycotis, 453. 



acutangula, 454. 



asodalis, 454. 



histrionica, 456. 



minax, 454. 



nigroliueata, 455. 



quadrilineata, 455. 



quadrivittata, 454, 455, 479. 



sagittata, 453, 454, 479. 



spreta, 456. 



tnberculata, 456. 



vittata, 455, 456, 479. 

 platyrhinus. Heterodon, 302, 303. 

 platystomus, Lepidosteus, 147, 148, 



1()0. 

 Plea striola, 174. 

 Plecoptera, 155, 175. 

 Plestiodon erythrocephalus, 257. 



fasciatum, 257. 



quinquelineatuui, 257. 

 Plethodon, 3t)0, 364. 



cinereus, 3(i6. 



var. cinereus, 36(). 

 var. erytlironotus, 36t). 



erythronotus, 365, 366. 

 var. cinereus, 36(), 3(57. 

 var. erythrouottis, 366, 367. 



f uscus, 358. 



glutinosus, 363, 365. 

 Piethodontida?, 3.53. 360. [3r>0. 



synopsis of Illinois genera of, 



