Superfamily APOIDEA 2033 



39: 524-535, figs 2-6 (nest architecture, life history, cocoon, effect of cell size and 

 placement on sex ratio, mud collecting, foraging behavior, parasites, predators). —Rust, 

 1974. Wasmann Jour. Biol. 32: 21-27, table 3 (nest architecture, life history, mating 

 behavior, parasites, predators). 

 ribifloris biedermannii Michener. Oreg., Calif., Nev., Utah, Ariz., west. N. Mex.; Mexico (Baja 

 CaUfornia). Ecology: Nests in borings, abandoned Sceliphron nests and between cracks 

 in shingles. Pollen: Polylectic, visits flowers o{ Arctostaphylos drupacea, A. glandulosa, 

 A. glauca, A. patula, Asclepias, Astragalus, Berberis, Eriodictyon crassifolium, 

 Fendlera, Phlox, Prunus, Rhus, Ribes, Salix, Salvia soiiomensis, Wyetliia. 

 Osmia ribifloris biedermannii Michener, 1936. Amer. Mus. Novitates 875: 19. 9, 6. 



Biology: Leech, 1959. Pan-Pacific Ent. 35: 53 (nest). — Krombein, 1967. Trap-nesting wasps 

 and bees, p. 306 (nest architecture, life history, as ribifloris). —Rust, 1974. Wasmann 

 Jour. Biol. 32: 32 (nest architecture, foraging behavior). 

 ribifloris ribifloris Cockerell. Tex., N. Mex., Colo., Utah, Nev. Pollen: Unknown, but visits 

 flowers of Berberis, Sophora. 

 Osmia (Melanosmia) ribifloris Cockerell, 1900. Ann. and Mag. Nat. Hist. (7) 5: 410. 9. 



Genus OSMIA Subgenus CHALCOSMIA Schmiedeknecht 



Osmia Subg. Chalcosmia Schmiedeknecht, [1885]. Apidae Europaeae, v. 2, p. 886. 



Type-species: Osmia fiilviventris Latreille. Desig. by Sandhouse, 1939. 

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



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



Revision: Rust, 1974. Wasmann Jour. Biol. 32: 32-56, figs. 3-4, 15-26, tables 4-6. 

 Biology: Rust, 1974. Wasmann Jour. Biol. 32: 34 (summary of information on life histories). 

 chalybea Smith. N. J., N. C, Ga., Fla., La., Tex. Pollen: Unknown, but visits flowers of 

 Ceanothus, Cirsium, Vaccinium. 

 Osmia chalybea Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 143. 9,6. 



Taxonomy: Cockerell, 1905. Amer. Ent. Soc, Trans. 31: 33. 6. 

 coerulescens (Linnaeus);- Holarctic. N. S. to Minn, south to N. C, Ind., 111., Mo., and Neb.; 



Idaho (Twin Falls), where probably adventive. Ecology: Nests in preexisting burrows in 

 wood or in open cavities as in old mud dauber nests. Parasite: Melittobia chalybii 

 Ashm., Monodontomerus sp. Pollen: Collects pollen from Leonurus cardinea, Medicago 

 sativa, Nepeta cafaria, but visits other flowers including Agastache, Cercis, Cirsium, 

 Lotus, Philadelphus, Salvia, Trifolium, Vicia. Predator: Attagenus piceus Oliv., 

 Chaetodactylus sp., Trogoderma inclusum LeC, T. teukton Beal. 



Apis coerulescens Linnaeus, 1758. Syst. Nat., ed. 10, p. 576. 9. 



Apis aenea Linnaeus, 1761. Fauna Suecica, ed. 2, p. 421. 6. 



Osmia cyanea Giraud, 1866. Soc. Ent. France, Ann. 6: 451. 9, d. 



Osmia purpurea Cresson, 1864. Ent. Soc. Phila., Proc. 3: 27. 9. 



Osmia rustica Cresson, 1864. Ent. Soc. Phila., Proc. 3: 27. 6. 



Osmia coerulescens Dalla Torre, 1896. Cat. Hym., v. 10, p. 388. Emend. 



Biology: Chandler, 1963. North Central Branch, Ent. Soc. Amer., Proc. 18: 30 (nest, 

 predators, parasites). —Krombein, 1967. Trap-nesting wasps and bees, pp. 310-311 (nest 

 architecture, life history, predator). -Medler, 1967. Ent. Soc. Amer., Ann. 60: 341, table 1 

 (nest architecture). — Tasei, 1972. Apidologie 3: 149-165 (nest architecture, life history, 

 parasites). —Rust, 1974. Wasmann Jour. Biol. 32: 42 (life history, predators, parasites). 

 coloradensis Cresson. Nebr. to Tex., west to B. C, Wash., Oreg. and Calif.; Mex. (Baja 

 California). Ecology: Nests in burrow in Pinns Jeffrey i cone as well as trap-nests. 

 Parasite: Chrysura pacifica (Say). Pollen: Apparently prefers pollen from the flowers of 

 Compositae, but also visits other flowers possibly for nesting material; visitation records 

 include Anisinckia intermedia, Barbarea orthoceras, Calandriuia caulescens var. 

 menziesii. Calendula, Carduus tenuiflorus, Centaurea, Chaoiactis fremontii, C. 

 glabriuscula, Chrysothainnus, Cirsium califoniieum. Coreopsis lanceolata, Cryptantha 

 intermedia, Encelia farinosa, Erigeron, Eriodictyon, Eriogonum nudum, Eriophyllum 



