Superfamily APOIDEA 2035 



californica Cresson. B. C. to Calif., east to Mont., Wyo. and Colo. Ecology: Nests in borings 



and preexisting burrows in various wood substrates. Parasite: Anthrax sp., Chrysis sp., 

 Leucospis affinis Say, Nemog^iatlia sp., Stelis sp., Tricrania stansbiiryi Hald. Pollen: 

 Apparently mainly dependent upon the pollens of Compositae, especially Girsiioii, but 

 visits many flowers including Amsinckia, Arnica, Balsamorrhiza, Brodiaea liitea, 

 Calochortus, Carduus tenuiflorus, Ceanothus, Chaenacfis glabriuscula, Cirsimn 

 califoniicum, C. proteanum, Clarkia, Cryptantha intermedia, Erigeron pygmaeus, 

 Eriodictyon calif omicum, Eriogonum, Eriophyllum lanatum, Gilia capitata, Grindelia 

 camporum, Helianthus nuttallii, Layia platyglossa, Lotus strigosus var. hirtellus, 

 Liipinus, Mimulus guttatus, Penstemon, Pliacelia heterophylla, P. Irmnilis, 

 Physocarpiis, Ranunculus, Salix, Senecio integerrimus, Sidalcea, Stenotopsis 

 linearifolius. Taraxacum officinale, Viguiera multiflora, Wyethia angustifolia, W. elata, 

 W. glabra, W. Iielenioides, W. to7igicaulis, W. mollis, W. ovata, W. reticulata. Predator: 

 Ptinis califomicus Pic, Trichodes omatus Say. 



Osmia californica Cresson, 1864. Ent. Soc. Phila., Proc. 3: 24. 9. 



Osmia pascoensis Cockerell, 1897. Acad. Nat. Sci. Phila., Proc. 49: 342. 9. 



Osmia nassa Cockerell, 1910. Ent. News 21: 272. 9. 



Osmia occidentalis Michener, 1936. Canad. Ent. 68: 42. 9. 



Biology: Bohart, 1955. Ent. Soc. Wash., Proc. 57: 203-204 (nest, supersedure). —Levin, 1966. 



Kans. Ent. Soc, Jour. 39: 524-535, 6 figs., 3 tables (nest architecture, life history, 



supersedure, sex relationships, pollen collection, parasites). —Rust, 1974. Wasmann Jour. 



Biol. 32: 66-69 (nest architecture, life history, parasites). 

 grinnelli Cockerell. Calif., Nev., Utah, Idaho. Pollen: Unknown, but visits flowers of 



Arctostaphylos drupacea, A. patula. Aster abatus. Astragalus pachypus, Chaenactis 

 glabriuscula. Coreopsis lanceolata, Cryptantha intermedia, Descurainia sophia, Encelia 

 actoni, E.frutescens, Erysimum, Helianthus gracilentus, Hesperochiron califomicum, 

 Hulsea callicarpha, Lupinus, Nepeta, Penstemon, Prunus subcordata. Sisymbrium, 

 Stenotopsis linearifolius. Taraxacum, Wyethia. 



Osmia gnnnelli Cockerell, 1910. Ent. News 21: 120. 9. 

 marginipennis Cresson. Calif., Nev., Oreg., Idaho, Utah, Colo., Wyo.; Mexico (Baja California). 

 Pollen: Unknown, but visits flowers of Chaenactis. 



Osmia marginipennis Cresson, 1878. Amer. Ent. Soc, Trans. 7: 106. 6. 



Osmia gaillardiae Cockerell, 1906. Ann. and Mag. Nat. Hist. (7) 17: 227. 9. 



Osynia viridior Cockerell, 1907. Ann. and Mag. Nat. Hist. (7) 19: 261. i. 



Osmia leonis Cockerell, 1907. Ann. and Mag. Nat. Hist. (7) 20: 123. 9. 

 montana tnontana Cresson. B. C. to Calif. (White Mts.), east to Idaho and Mont., south to 



Ariz, and N. Mex. Ecology: Nests in trap-nests. Parasite: Stelis montana Cress. Pollen: 

 Analyzed pollen stores indicates rehance on Compositae including Balsamorrhiza 

 sagittata. Cosmos, Helianthus annuus, Wyethia amplexicaulis, but also visits other 

 flowers for nectar or pollen including Arnica, Aster, Chaenactis, Gutierrezia, Senecio, 

 Silybuvi, Taraxacum. 



Osmia montana Cresson, 1864. Ent. Soc. Phila., Proc. 3: 24. 6. 



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



Osmia armaticeps var. sapellonis Cockerell, 1901. Ann. and Mag. Nat. Hist. (7) 7: 336. 9. 



Biology: Rust, 1974. Wasmann Jour. Biol. 32: 76-80 (nest architecture, life history, 

 supersedure, parasite). 

 montana quadriceps Cresson. Wash, to Calif., Nev., Ariz. (Santa Catalina Mts.). Ecology: 



Nests in abandoned beetle burrows in Pinus contorta. Pollen: Apparently polylectic, 

 although most floral records from noncomposite genera refer to visits for leaf or dried 

 flower material; visitation records include Agoseris heterophylla, Arctostaphylos patula, 

 Aster, Astragalus, Balsamorhiza deltoides, Ceanothus integirrimus, Chaenactis 

 glabriuscula, Cirsium, Clarkia biloba. Coreopsis, Eriodictyon, Eriophyllum 

 confertiflorum, E. lanatum, Gilia capitata, Gormania obtusata, Haplopappus 

 linearifolius, Helianthella californica, Helianthus gracilentus, Hesperochiron 

 califomicus, Lasthenia chrysostoma, Layia platyglossa, Lotus scoparius, Lupinus, 

 Mimulus snksdorfii, Nemophila integrifolia, Penstemon, Phacelia humilis, Potentilla, 



