INDEX 
orbiculare, Phrynosoma, 361. 
orbignyi, Trigona, 606. 
Orbitella, 551, 580. 
ordii, Dipodomys, 486. 
Oreichthys, 320. 
Oreopasites, 580. 
seituli, 580. 
oribazi, Macroglossa, 566. 
Orientalibombus, 580. 
orientalis, Anoxia, 164. 
Bombus, 580. 
Plesiothomomys ?, 508. 
ornata, Praxillura, 102, 181. 
Orphana, 563, 580, 595. 
inquirenda, 568, 580, 595. 
Orthogeomys, 508. 
Osiris, 551, 580. 
pallidus, 580. 
Osmia, 522, 524, 528, 529, 536, 587, 549, 
553, 556, 559, 564, 565, 568, 569, 
580, 581, 606. 
albiventris, 564. 
andrenoides, 549. 
armaticeps, 535. 
(Aspidosmia) arnoldi, 529. 
bicornis, 524. 
bucephala, 5385. 
eanadensis, 574. 
claviventris, 564. 
eonjuncta, 545. 
cordata, 607. 
distincta, 578. 
emarginata, 522. 
flavicornis, 601. 
fuciformis, 569. 
fulgida, 588. 
georgica, 555. 
grandis, 568. 
mitis, 522. 
montana, 535. 
montivaga, 522. 
odontogaster, 522. 
platycera, 528, 565. 
quadridentata, 545. 
rufa, 524, 581. 
(Nothosmia) simillima, 574. 
tricornis, 580. 
tridentata, 606. 
(Atoposmia) triodonta, 529. 
villosa, 565. 
osmioides, Halictus (Gastrohalictus), 
5p: 
Osoriinae, 76, 77, 78, 84. 
Osoriinae and Lispini, notes on the clas- 
sification of the staphylinid beetles of 
the groups, 75. 
Osoriini, 76, 79, 83. 
Osteology of Polyglyphanodon, an Up- 
per Cretaceous lizard from Utah, 229. 
Oterobombus oberti, 579. 
Otobothrium, 30. 
Otobothrium robustum, 30. 
Otospermophilus, 485, 486, 506. 
ovatula, Andrena, 602. 
Melitta, 602. 
653 
Oxaea, 544, 580. 
flavescens, 544, 580. 
gloriosa, 592. 
Oxycetonia jucundo, 175. 
Oxyhalictus, 580. 
Oxynedys, 559, 580. 
beroni, 580. 
Oxyrhopus doliatus aequifasciata, 393. 
doliatus semicinctus, 393. 
Oxystoglossa, 581. 
decorata, 581. 
Oxytelinae, 75, 76. 
Oxytrigona, 581. 
Pachyanthidium, 573, 581, 605. 
(Trichanthidium) occipitale, 605. 
(Micranthidium) truncatum, 573. 
Pachycentris, 581. 
schrottkyi, 581. 
Pachycerapis, 581. 
Pachycrepis, 46. 
lachni, 46. 
Pachyhalictus, 581. 
Pachylocrinidae, 151. 
Pachylocrinus, 151, 153. 
Pachymelopsis, 581. 
Pachymelus, 581. 
conspicuus, 581. 
micrelephas, 581. 
Pachyneuron, 46. 
Pachyosmia, 524, 536, 580, 581. 
pachyphloea, Juniperus, 406, 407, 413, 
414, 446, 459, 460, 462, 470, 472, 474. 
Pachyprosopis, 582. 
mirabilis, 582. 
pacifiea, Micrandrena, 578. 
pacificus, Equus, 518. 
Paedia, 582. 
Paidia, 525, 582, 587. 
Palaeorhiza, 582. 
giganteus, 568. 
melanura, 558. 
Palinepeolus, 5338, 582. 
palliata, Nybelinia, 25, 31. 
palliatus, Tetrarhynchus, 31. 
pallidulus, Luperodes, 59, 68. 
pallidus, Neodryocoetes, 181, 198. 
pallidus, Osiris, 580. 
Palmaceae, 178. 
palmas, Polypterus, 303, 304. 
palmeri, Gerrhonotus, 365. 
pamirus, Subterraneobombus, 579. 
pannonica, Dioxys, 588. 
Panurginus, 531, 555, 582, 599. 
albopilosus, 599. 
niger, 582. 
polytrichus, 531. 
panurgoides, Morawitzia, 574. 
Panurgomia, 582. 
fuchsi, 582. 
Panurgus, 549, 582. 
aethiops, 594. 
andrenoides, 584. 
ater, 582. 
chalybaeus, 545. 
