Superfamily APOIDEA 2075 



Melilotus, Penstemon, Phaseolus, Psoralea, Pycnanthemum hypsifolia, Stachys, 



S trap host yles, Tephrosia virgiyiiana, Vaccinium. 

 Megachile georgica Cresson, 1878. Amer. Ent. Soc, Trans. 7: 123. 9, S. 

 Megachile penicillata Cockerell, 1915. Ann. and Mag. Nat. Hist. (8) 15: 536. 9. 



Biology: Krombein, 1967. Trap-nesting wasps and bees, pp. 337-339 (life history, nest 



architecture, supersedure, parasite). 

 lobatifrons (Cockerell). N. Mex., Ariz., south, and east. Calif., Mexico. Pollen: Unknown, but 



visits flowers of Acacia greggii, Cercidium, Dalea emoryi, Eriogonum fasciculatum, E. 

 trichopes, Larrea tridentata, Ohieya tesota, Prosopis glandulosa var. torreyanum, P. 

 pubescens, Wislizenia refracta. 



Megachile lobatifrons Cockerell, 1924. Calif. Acad. Sci., Proc. (4) 12: 547. 9,6. 

 manni (Mitchell). Ariz. 



Megachile (Chelostomoides) manni Mitchell, 1934. Amer. Ent. Soc, Trans. 59: 355. 9, d. 

 occidentalis (Fox). Tex., N. Mex., Ariz., south. Calif.; Mexico; deserts. Ecology: Nests in adobe 

 and brick walls as well as in dead wood of a pepper tree and trap nests. Parasite: 

 Nemognatha litrida LeC. Pollen: Unknown, but visits flowers o{ Caleopsis, Cercidium 

 torreyanum, Chilopsis li7iearis, Cleome, Croton califoniicus, Duranta plumieri, Geraea 

 canescens, Helianthus, Hoffmanseggia densiflora, Larrea tridentata, Lotus, Marrubium 

 vulgare, Medicago sativa, Nolina parryi, Phacelia, Phyla nodiflora, Pluchea 

 camphorata, Prosopis, Schinus molle, Ruellia, Senecio, Taniarix gallica, Verbesina, 

 Veni07iia, Vicia cracca, Wislizenia refracta. 



Megachile occidentalis Fox, 1894. Calif. Acad. Sci., Proc. (2) 4: 117. i. 



Megachile prosopidis Cockerell, 1900. Ann. and Mag. Nat. Hist. (7) 6: 16. 9. 



Megachile prosopidis var. testudinis Cockerell, 1924. Calif. Acad. Sci., Proc. (4) 12: 550. 9. 



Biology: Krombein, 1967. Trap-nesting wasps and bees, pp. 343-344 (life history, nest 



architecture, supersedure). — Hurd and Linsley, 1975. Smithsn. Contrib. Zool. 193: 39 



(floral relationships). 

 odontostoma (Cockerell). N. Mex., Ariz., south. Calif., Mexico, deserts. Pollen: Unknown, but 

 visits flowers oi Acacia greggii, Asclepias, Baileya, Cercidium floridum, Chaenactis 

 stevioides, Encelia farinosa, Helianthus, Heliotropium, Lepidium, Medicago sativa, 

 Melilotus, Palafoxia linearis, Prosopis glayidnlosa var. torreyayium, Senecio, Verbesina 

 encelioides. 



Megachile odontostoma Cockerell, 1924. Calif. Acad. Sci., Proc. (4) 27: 550. 9. 



Megachile (Chelostomoides) duplexa Mitchell, 1934. Amer. Ent. Soc, Trans. 59: 353. 6. 



Taxonomy: Mitchell, 1956. Pan-Pacific Ent. 32: 131 (synonymy). 

 rugifrons (Smith). N. C, Ga., Fla., Mich., 111., Nebr., Kans., Ark., Tex. Pollen: Unknown, but 

 visits flowers of Apocynum, Blephilia, Coreopsis, Erigeron, Hypericum, Lobelia, 

 Nepeta, Pontederia, Psoralea, Tephrosia, Vacciyiium, Verbena, Vero7iicastrum 

 virginiciim. 

 Chelostoma rugifrons Smith, 1854. Cat. Hym. Brit. Mus., v. 2, p. 220. 9 . 

 Chelostomoides rugifrons Cockerell, 1904. Canad. Ent. 36: 301. 9. 

 Megachile rufimanus Robertson, 1891. Amer. Ent. Soc, Trans. 18: 65. 9, 6. 

 spinotulata (Mitchell). Tex., N. Mex., Ariz., south. Calif. Parasite: Leucospis affinis Say. 

 Pollen: Polylectic, visits flowers of Adenostegia filifolia, Allionia, Asclepias erosa, 

 Boerhaavia spicata, Calochortus splendens, Cercidium, Chrysopsis fastigiata, 

 Cordylanthus filifolius, C. nevinii, C. rigidus, Croton califoniicus, Cryptantha, Dalea 

 califomica, Eriodictyon, Eriogonum fasciculatum, E. inflatum, E. subscaposum, E. 

 trichopes. Geranium, Helianthus, Lotus americanus, L. argophyllus, L. Hamatus, L. 

 scoparius, Marrubium vulgare, Mentzelia laevicaulis, Phacelia ramosissima, Robinia, 

 Senecio, Sapindus, Swertia parryi. 

 Megachile (Chelostomoides) spinotulata Mitchell, 1934. Amer. Ent. Soc, Trans. 59: 357. 9, 

 d. 

 Biology: Hurd and Linsley, 1975. Smithsn. Contrib. Zool. 193: 39 (floral relationships). 

 subexilis (Cockerell). Nebr., Colo., N. Mex., Utah, Ariz., Nev., Calif. Ecology: Nests in adobe 



wall and also in borings. Parasite: Coelioxys gilensis Ckll., Dioxys pomonae Ckll. Pollen: 



