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OCCASIONAL PAPERS OF THE CALIFORNIA ACADEMY OF SCIENCES 
Number 158 
OSMIA SECLUSA SANDHOUSE 1924, 3354 
OSMIA SEDULA SANDHOUSE 1924, 3354 
OSMIA SOLITARIA SANDHOUSE 1924, 3354 
OSMIA VANA SANDHOUSE 1924, 3354 
OSMIA VANDUZEEI SANDHOUSE 1924, 3354 
OSMIA VANDYKEI SANDHOUSE 1924, 3354 
OSMIA VISENDA SANDHOUSE 1924, 3354 
OSPIOCERUS PAINTERORUM MARTIN 1968, 2830 
OSPRIOCERUS ALAMOSENSIS MARTIN 1968, 2830 
OSPRIOCERUS GALADAE MARTIN 1968, 2830 
OSPRIOCERUS SINALOENSIS MARTIN 1968, 2830 
OSPRIOCERUS VALLENSIS MARTIN 1968, 2830 
OSPRIOCERUS VILLUS MARTIN 1968, 2830 
OSPRIOCERUS YOUNGI MARTIN 1968, 2830 
OSTEAFREUDENBERGIHERTLEIN & JORDAN 1927, 
1873 
OSTEOCELLA SEPTENTRIONALIS STEARNS 1873, 
3537 
OSTEODISCUS CASCADIAE STEIN 1978, 3560 
OSTREA ANGERMANNI HERTLEIN & JORDAN 1927, 
1873 
OSTREA AVICULIFORMIS ANDERSON 1905, 45 
OSTREA BOURGEOISII REMOND 1863, 3226 
OSTREA CALIFORNICA OSUNAI HERTLEIN 1966, 
1868 
OSTREA EDULIS, 2634 
OTIDOCEPHALUS ALTERNATUS HORN 1895, 1936 
OTIDOCEPHALUS CARINICOLLIS HORN 1895, 1936 
OTIDOCEPHALUS SPARSUS HORN 1895, 1936 
OTION STIMPSONI DALL 1872, 938 
OULOPHYLLIA CALIFORNICA DURHAM 1942, 1103 
OVULAPUANA ANDERSON 1929, 50 
O WANIA MEXICANA VAR DUBIA BRANDEGEE 1901, 
566 
OXACIS DEBILIS HORN 1896, 1938 
OXACIS DUBIOSA HORN 1896, 1938 
OXACIS FLORIDANA HORN 1896, 1938 
OXACIS FRAGILIS HORN 1896, 1938 
OXACIS GRISEAHORN 1896, 1938 
OXACIS LAEVICOLLIS HORN 1896, 1938 
OXACIS SORORIA HORN 1896, 1938 
OXACIS SUBFUSCAHORN 1896, 1938 
OXAEA VAGANS FOX 1894, 1465 
OXALIS, 3295, 3296 
OXALIS OREGENA VAR. SMALLII (KNUTH) PECK 
1954 [COMB. NOV.], 3095 
OXYAPHUS ANGUSTIFOLIUS VAR. VISCIDUS EAST- 
WOOD 1896, 1122 
OXYBAPHUS, 284 
OXYBAPHUS FROEBELII BEHR 1855, 338, 349 
OXYBAPHUS POLYTRICHUS (STABDL.) BARNEBY 
1947 [COMB. NOV.], 284 
OXYBELUS VENTRALIS FOX 1894, 1465 
OXYCHEILINUS LINEATUS RANDALL & WEST- 
NEAT & GOMON 2003, 3181 
OXYCHEILINUS NIGROMARGINATUS RANDALL & 
WESTNEAT & GOMON 2003, 3181 
OXYOPEIDON ABSOLUTUM CHAMBERLIN 1924, 
717 
OXYOPEIDON ABSOLUTUM OBLIQUUM CHAM¬ 
BERLIN 1924, 717 
OXYOPEIDON COMMUNICANS CHAMBERLIN 1925, 
718 
OXYOPEIDON CUBANUM CHAMBERLIN 1925, 718 
OXYOPEIDON HAYTIANUM CHAMBERLIN 1925, 
718 
OXYOPEIDON TUBERCULATUM CHAMBERLIN 
1925,718 
OXYOPES ACTOPHILUS CHAMBERLIN 1924, 717 
OXYOPES CLASSICUS CHAMBERLIN 1925, 718 
OXYPODAINSIGNIS CASEY 1885, 708 
OXYROPIS C.H.EIGENMANN & R.S.EIGENMANN 
1889, 1317 
OXYROPIS WRIGHTIANA C.H.EIGENMANN & 
R.S.EIGENMANN 1889, 1317 
OXYTHECA, 2217 
OXYTROPIS, 304 
OXYTROPIS BESSEYI VAR. ARGOPHYLLA (RYDB.) 
BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS BESSEYI VAR. VENTOSA (GREENE) 
BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS CAMPESTRIS VAR. COLUMBIANA (ST. 
JOHN) BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS CAMPESTRIS VAR. CUSICKII 
(GREENM.) BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS CAMPESTRIS VAR. DAVISII WELSH 
1963, 3877 
OXYTROPIS CAMPESTRIS VAR. DISPAR (A. NELS.) 
BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS CAMPESTRIS VAR. GRACILIS (A. 
NELS.) BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS CAMPESTRIS VAR. JORDALII (POR- 
SILD.) WELSH 1963 [COMB. NOV.], 3877 
OXYTROPIS DEFLEXA VAR. FOLIOLOSA (HOOK.) 
BARNEBY 1951 [COMB. NOV.], 292 
OXYTROPIS JONESII BARNEBY 1952, 295 
OXYTROPIS LAGOPUS VAR. ATROPURPUREA 
(RYDB.) BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS LAMBERTII VAR. ARTICULATA 
(GREENE) BARNEBY 1951 [STAT. NOV.], 292 
OXYTROPIS NIGRESCENS VAR. LONCHOPODA 
BARNEBY 1963, 304 
OXYTROPIS SERICEA VAR. SPICATA (HOOK.) 
BARNEBY 1951 [COMB. NOV.], 292 
OZARBA CONSTERNANS HAYES 1975, 1804 
OZOPHORA UNICOLOR UHLER 1894, 3728 
PACHYBRACHIUS NESOVINCTUS ASHLOCK 1972, 
132 
PACHYBRACHYS INDIFFERENS FALL 1927, 1417 
PACHYBRACHYS XANTHOCHROUS 1927, 1417 
PACHYCARA CROSSACANTHUM ANDERSON 1989, 
57 
