Superfamily APOIDEA 2173 

 Taxonomy: Rozen, 1965. Amer. Mus. Novitates 2233: 13-26, figs. 35-72 (larvae). 



Genus CENTRIS Fabricius 



Taxonomy: Timberlake, 1940. Pan-Pacific Ent. 16: 138-141 (Calif, spp.). — Michener, 1951. 

 Kans. Ent. Soc, Jour. 24: 1-11 (subgenera). -Snelling, 1956. Pan-Pacific Ent. 32: 1-8 (Calif, 

 spp.). -Mitchell, 1962. N. C. Agr. Expt. Sta. Tech. Bui. 152: 333-338, figs. 96, 97 (eastern 

 U. S. spp.). —Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 112: 1-33 (nomencl. and 

 tax. of some N. Amer. spp.). —Snelling, 1974. Los Angeles Co. Mus., Contrib. Sci. 259: 1-41, 

 44 figs, (distr. and tax. of some N. Amer. spp.). 



Biology: Kurd and Linsley, 1975. Smithsn. Contrib. ZooL 193: 44-46 (intrafloral ecol. of 

 Larrea visiting spp.). — Alcock, Jones and Buchmann, 1976. Kans. Ent. Soc, Jour. 49: 

 469-474, 5 figs., 1 table (nesting behavior). 



Genus CENTRIS Subgenus XEROCENTRIS Snelling 



Centris subg. Xerocentris Snelling, 1974. Los Angeles Co. Mus., Contrib. Sci. 259: 3. 

 Type-species: Centris calif omica Timberlake. Orig. desig. 



Taxonomy: Snelling, 1974. Los Angeles Co. Mus., Contrib. Sci. 259: 3-5 (key to N. Amer. 

 spp.). 

 californica Timberlake. Calif., Ariz.; Mexico (Baja California). Pollen: Apparently oligolectic on 

 Wislizenia refracta, but also visits flowers of Cleomella obtusifolia. 

 Centris californica Timberlake, 1940. Pan-Pacific Ent. 16: 139. 9. 

 hoffmanseggiae Cockerell. N. Hex., Ariz., south Calif, and Santa Lucia Mts. in coastal central 

 Calif. Pollen: Polylectic, visits flowers of Astragalus, Cercidiuvi, Dicentra chrysantha, 

 Larrea trideiitata, Lotiis scoparius, Lupinus densiflorus, Medicago sativa, Melilotus, 

 Penstemon antirrhinoides, Prosopis glandulosa. 

 Centris hoffmanseggiae Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 395. 6 ( 9 



misdet.). 

 Centris hoffmanseggiae davidsoni Cockerell, 1904. South. Calif. Acad. Sci., Bui. 3: 160. 6. 



Taxonomy: Cockerell, 1900. Canad. Ent. 32: 363. <J, 9. 

 pallida Fox. Ariz., south Calif, deserts and Santa Catalina Island; Mexico (Baja California and 

 Sonora). Pollen: Polylectic, chiefly Acacia greggii, Cercidium torreyanum, Dalea emoryi, 

 D. spinosa, Larrea tridentata, Olneya tesota, Prosopis pubescens, but also visits other 

 flowers including Asclepias erosa, Aster spinosa, Cirsium, Parkinsonia aculeata. 

 . Centris pallida Fox, 1899. Acad. Nat. Sci. Phila., Proc. 51: 66. 9. 



Centris pallida callognatha Cockerell, 1923. Calif. Acad. Sei., Proc. (4) 12: 78. 9. 

 Centris trichosoma Cockerell, 1923. Calif. Acad. Sci., Proc. (4) 12: 78. 6 . 



Biology: Alcock, Jones and Buchmann, 1976. Jour. ZooL, London 179: 189-199, 3 pis., 2 figs., 2 

 tables (nest site, adult behavior including emergence, mating). —Alcock, Jones and 

 Buchmann, 1976. Kans. Ent. Soc, Jour. 49: 472-474, figs. 4, 5, table 1 (nest architecture, 

 nesting behavior). —Alcock, 1976. Psyche 83: 121-131, 2 figs., 1 table (social organization of 

 male populations). 

 rhodomelas Timberlake. Calif. Pollen: Unknown, but visits flowers of Psoralea macrostachya. 



Centris rhodomelas Timberlake, 1940. Pan-Pacific Ent. 16: 139. 9,6. 

 tiburonensis Cockerell. Ariz., south. Calif.; Mexico (Baja California). Pollen: Polylectic, chiefly 

 Dalea including D. emoryi, D. schottii, D. spinosa, but visits other flowers for nectar 

 and or pollen including Acacia greggii, Asclepias, Cercidium torreyanum, Koeberlinia 

 spinosa, Olneya tesota. 

 Centris tiburonensis Cockerell, 1923. Calif. Acad. Sci., Proc. (4) 12: 78. 9. 



Genus CENTRIS Subgenus PARACENTRIS Cameron 



Paracentris Cameron, 1903. Amer. Ent. Soc, Trans. 29: 235. 



Type-species: Paracentris fulvohirta Cameron. Monotypic 

 Centris subg. Penthemisia Moure, 1950. Dusenia 1: 390. 



Type-species: Hemisia Chilensis Spinola. Orig. desig. 

 Centris subg. Trichocentris Snelling, 1956. Pan-Pacific Ent. 32: 4. 



