2036 Hymenoptera in America North of Mexico 



Raillardella scaposa, Ribes cereian. Salvia, Senecio, Sidalcea, Sisyinbrium irio, 

 Tamarix gallica, Taraxacum officinale, Wyetliia angustifoiia, W. helenioides, W. mollis. 



Osmia quadriceps Cresson, 1878. Amer. Ent. Soc, Trans. 7: 104. 9. 



Biology: Rust, 1974. Wasmann Jour. Biol. 32: 81 (nest). 

 subaustralis Cockerell. N. W. T. east to Ont. and Mich., south to Calif., Nev., Ariz, and N. Mex. 



Ecology: Nests in abandoned beetle burrows in fir log, probably Abies lasiocarpa. 



Pollen: Analyzed pollen stores revealed 99 per cent from Compositae, probably Senecio; 



visits flowers of Aster, Centaurea, Encelia farinosa, Erigeron, Gutierrezia, Lupinus, 



Penstemon, Phacelia hmnilis, Raillardella scaposa, Senecio, Solidago, Streptajithus, 



Taraxacum, Wyethia, Yucca. 

 Osmia nigrifrons var. subaustralis Cockerell, 1900. Ann. and Mag. Nat. Hist. (7) 5: 410. 9. 

 Osmia wardiana Cockerell, 1907. Ann. and Mag. Nat. Hist. (7) 19: 368. 9. 

 Osmia seneciophila Cockerell, 1907. Ann. and Mag. Nat. Hist. (7) 20: 446. 6. 

 Osmia nelsoni Cockerell, 1930. Ann. and Mag. Nat. Hist. (10) 5: 411. 9. 

 Osmia wardiana austromontana Michener, 1936. Canad. Ent. 68: 42. 9. 

 Osmia lyncis Cockerell, 1937. South. Calif. Acad. Sci., Bui. 36: 110. 9. 

 Osmia (Cephalosmia) mendocinensis Sandhouse, 1939. Ent. Soc. Wash., Mem. 1: 27. 9. 



Biology: Rust, 1974. Wasmann Jour. Biol. 32: 85 (nest architecture, pollen). 

 Genus OSMIA Subgenus CENTROSMIA Robertson 



Centrosmia Robertson, 1903. Amer. Ent. Soc, Trans. 29: 165. 



Type-species: Osmia bucephala Cresson. Orig. desig. and monotypic. 



Revision: Sinha and Michener, 1958. Kans. Univ. Sci. Bui. 39: 275-303 (Nearctic spp.). 

 austromaritima Michener. Calif., Colo., Utah. 



Osmia austromaritima Michener, 1936. Canad. Ent. 68: 43. 6. 

 bakeri Sandhouse. Oreg., Calif. Pollen: Unknown, but visits flowers of Clarkia, Collinsia 

 cliildii, C. heterophylla, C. wrightii, Cryptantha lepida, G'ilia tricolor, Nemopliila 

 integrifolia. 

 Osmia bakeri Sandhouse, 1924. Calif. Acad. Sci., Proc. (4) 13: 345. 6. 

 bucephala Cresson. Holarctic; Alaska, Yukon and N. W. T. to Que., south to Calif., Utah, N. 

 Mex., 111., Tenn., and N. C; limited to mountains in southern part of range. Ecology: 

 Nests in borings and in a tunnel in a maple tree. Parasite: CItaetodactylus krombeini 

 Baker, Melittobia chalybii Ashm. Pollen: Unknown, but visits flowers of Aesculus, 

 Azalea, Baptisia, Cercis canadensis, Dentaria, Dicentra, Erythronium, Mertensia 

 virginica, Nepefa liederacea, Penstemon, Taraxacum, Tephrosia virginiana, Viola. 

 Osynia bucephala Cresson, 1864. Ent. Soc. Phila., Proc. 3: 17. 9. 

 Osmia megacepliala Cresson, 1864. Ent. Soc. Phila., Proc. 3: 18. 9. 

 Osmia latitarsis Cresson, 1864. Ent. Soc. Phila., Proc. 3: 20. 6. 

 Osmia lignivora Packard, 1867. Amer. Nat. 1: 375. 9. 

 Osmia lignicola Provancher, 1882. Nat. Canad. 13: 208. 9. 

 Os7nia stiboniata Cockerell, 1897. Acad. Nat. Sci. Phila., Proc. 49: 342. 9. 



Biology: Packard, 1867. Amer. nat. 1: 375 (nest, as lignivora). — Krombein, 1967. 

 Trap-nesting wasps and bees, pp. 307-310, pi. 18, figs. 89-91 (nest architecture, life history, 

 supersedure, parasites). 

 nigriventris (Zetterstedt). Holarctic; Alaska to Hudson Bay and Ont., south to Oreg., Colo, and 

 Minn.; Eurasia. 

 Anthophora nigriventris Zetterstedt, 1838. Ins. Lapponica, v. 1, p. 465. 9. 

 Os7Hiafrigida Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 142. 9, 6. 

 Osmia kudso7iica Cresson, 1864. Ent. Soc. Phila., Proc. 3: 21. 6. 

 Osmia corticalis Gerstaecker, 1869. Stettin. Ent. Ztg. 30: 331. 9, 6. 



Taxonomy: Cockerell, 1905. Amer. Ent. Soc, Trans. 31: 331. 9,6. —Mitchell, 1962. N. C. 

 Agr. Expt. Sta. Tech. Bui. 152: 77-78, fig. 33, table 4 (redescription, synonymy). 



