IXUEX. 



(A Special Index of the Families, Subfamilies, and Tribes of ihe Hemip'.era of 

 western Pennsylvania may be found at p. 229. A Special Index of contents of 

 Article XX is appended at p. 597.) 



AcanthaspinK, 205 

 Acanthocephala terminalis, 1S9 

 Acanthocephaliiife, 189 

 Acanthocerus galeator, l8g 

 Acanthosoma lateralis, 189 

 Acanthosomimi?, 189 

 Acholla multispinosa, 206 

 Acidaspidie, 357 

 Acidaspis trentonensis, 357 



sp.? 357. 359 

 Acocephalina;, 221 

 Acocephalus albifrons, 211 

 Acrogenia prolifera, 151, 161 

 Actinocrinus, 420, 421, 423 

 Actinopteria decussata, 151, 170 

 Acutalis calva, 211 

 Adams, C. 15., 580 

 Agallia constricta, 218 



novella, 218 



quadripunctata, 2l8 



sanguinolenta, 218 

 Agraulos (Arionellus) pustulatus, 358 

 Alcedinid;!;, 457 



Alder Creek, Montana, 408, 409 

 Alder Gulch, Montana, 408, 418 

 Alebra albostriella, 226 

 Algonkian Formations, Montana, 408, 



411, 412 

 Alleghany Mountains, 404 

 Allorge, Professor, 234 

 Allorisma elongatum, 423 

 Alydinoe, 190 

 Alydus conspersus, 190 



eurinus, 190 

 Amalopota fitchi, 214 

 Amblyospiza albifrons, 460 



unicolor, 460 

 Amboccelia umbonata, 82, 151, 155, 165 



sp.? 147, 424 

 Ambonychia curvata, 515, 519, 532, 533, 



534, 535 

 Ami, H. M., 383, 587, 58S, 589, 590, 



592 

 Amnestus pusillus, 185 

 spinifrons, 185 



Amphilichas minganensis, 514, 518, 

 519, 529, "530. 531. 532, 533. 

 534, 541, 542, 545. 546, 550, 

 566 

 sp.?556 

 Amphion barrandei. 379 



canadensis, 328, 363, 379, 380 

 salteri, 379 



sp-, 363, 597 

 Amphiscepa bivittata, 213 

 Ampyx halli, 332, 334 



normalis, 334 



semicostatus, 334 



sp. ? 332. 

 Anasa armigera, 190 



repipta, 190 



tristis, 190 

 Andropadus flavescens, 461 

 Aneurus inconstans, 203 

 Anisops platycnemis, 208 

 Anisoscelina?, 189 

 Anotia kirkaldyi, 214 

 Anthocoridffi, 207 

 Anthocorinse, 207 

 Anthony Collection of Birds, 2 

 Anthozoa, 80, 81, 153, 154 

 Anthozoa-Actinozoa, 150, 158 

 Anthreptes hypodilus, 462 

 Apaloderma narina, 456 

 Aphaninse, 193 

 Aphrophora parallela, 216 



quadrinotata, 216 

 Aphrophorinas, 216 

 Arabis glabra, 477 

 Aradidie, 203 

 Aradus acutus, 203 



sequalis, 203 



crenatus, 203 



quadrilineatus, 203 



similis, 203 

 Aralia hispida, 476 

 Arch;ean formations of Montana, 407, 



410, 413 

 Archreocidaris sp ? 419, 421 

 Archasia galeata, 211 



()05 



