926 



INDEX. 



Page. 



Pontobdella muricata 557 



rapax 557 



Populus balsamifera 343 



grandidentata 343 



tremuloides 343 



Porcellio 817,801 



asper 863 



aztecus 862 



Ijrandtii 863 



cinerascens 862 



cotillae 862 



cubensis 862 



degeerii 862 



dubius - 862,863 



eucercus 862 



flavipes 862 



formosus 817,861,862 



geiumulatus 863 



granulatus 863 



interrnptus 862 



l»vi8 817, 862 



maculieornis 863 



iiiexicauus 862 



musculus 862 



uigra 863 



ovatus 862 



paulenses 863 



poiyi 862 



acaber 817, 862, 863 



sumichrasti 862 



syriacus 862 



urbicus 862 



Porcupine, Canada 346 



Poroinya paradoxa 876 



Portomida' 592 



Portumnus 597 



Portunus affiuis 595 



angustus 616 



new species 594 



brevimanus 593 



cribrariu3 596 



uiinimus...^ 616 



new species 595 



ordwayi 594, 595 



panamensis 592 



sayi 592 



spiuimanus .593 



transversus 592 



tuberculatus 596 



xantusii 593 



Potamia 509 



chilensis 509 



latifrons 528 



schomburgkii 528 



Potamocarcinina' 508 



Potamocarcinus 507, 508, 509, 528, 531, 536 



armatus 528, 536 



dentatua 524 



denticulatus 528 



latifrons 528, 536, 537 



nicaraguensis... 528,531,536,537 



schomburgliii 536 



Potamon 532 



chileusis 532 



Potamouida* 600 



Page. 



Potentilla tridantata 343 



Pratincola maura 291 



Prionomitus 237 



Pristiphora 880 



oblonga 876 



Pristis 623 



Procamelus 760 



Procyon lotor 357 



Promachus ater, new species 315 



Protoclepsine 544 



new genus 546 



sesoculata 563 



new specica 546 



Prunus 236 



pennsylvanica 343 



serotina 343 



virginiana 343 



Psammobia dubia 875 



Pseuderipbia bispida 590 



Pseudione 818,868 



galacantbse 818, 868, 869 



giardi 818,868,869 



Pseudococcus yuccte 234 



Pseudopythina 876,887,892 



compressa 880, 888, 896 



new species 888 



macandrewi 876 



rugifera 880, 887, 896 



Pseudoryctes, new genus 258 



Pseudothelpbusa 507, 



508, 509, 512, 528, 529, 531, 532 



iequatorialis 507, 



510, 512, 513, 532, 537 



affiuis 511,513,532,537 



new species 524 



agassizii 511, 



512, 513, 525, 532, 537 

 new species . .. 519 



agrestis 510, 513, 532, 537 



new species ... 514 



americaua 509, 



510, 513, 521, 527, 532, 533, 537 



belliana 510,513,533,537 



new species . . . 515 



bisuturalis 511, 513, 533, 537 



bocourti. . - . 512, 513, 527, 533, 537 



bouvieri 511, 



512, 513, 519, 533, 537 



new species . . . 518 



chileusis 510. 



512, 513, 518, 519, 533, 537 

 colombiana 511, 



512,513,532,533,537 



conradi 511,512,513,533,537 



convexa 511,513,533,537 



new species . . . 525 



dentata 511, 



513, 524, 532, 533, 537, 600 

 denticulata 507, 



511,512,513,519,528,533,537 



dilatata 511, 513, 521, 



522, 525, 526, 534, 537 

 new species . . . 521 



dugesi 510, 533 



ecuadorensis . . . 510, 512, 534, 537 



