2066 Hymenoptera in America North of Mexico 



wheeleri Mitchell. Sask., N. Dak., Colo, to B. C. and mts. of Calif, and Ariz. Pollen: Unknown, 

 but visits flowers oi Aster foliaceus, Chaenactis glabriuscida, Chenopodium, 

 Chrysopsis, Chrysotliaviniis naiiseosus speciosus, Cryptantha, Encelia, Grmdelia 

 maritmia, G. squarrosa, Lasthenia, Layia glandidosa, Lygodesmia juncea, Medicago 

 sativa, Solidago, Sphaeralcea awbigua. 



Megachile wheeleri Mitchell, 1927. Psyche 34: 107. 9. 



Megachile spokane^isis Mitchell, 1927. Psyche 34: 109. 3. 

 wyomingensis Mitchell. Wyo. 



Megachile (Xeromegachile) wyomingensis Mitchell, 1934. Amer.Ent. Soc, Trans. 59: 327. 

 6. 



Genus MEGACHILE Subgenus ARGYROPILE Mitchell 



Megachile subg. Argyropile Mitchell, 1934. Amer. Ent. Soc, Trans. 59: 302, 308. 

 Type-species: Megachile parallela Smith. Orig. desig. 



Taxonomy: Mitchell, 1943. Pan-Pacific Ent. 19: 16 (Key to spp.). 

 asterae Mitchell. Utah. Pollen: Unknown, but visits flowers of Aster. 



Megachile (Argyropile) asterae Mitchell, 1943. Pan-Pacific Ent. 19: 13. 9. 

 parallela Smith. Transcont. U. S., south. Canada; Mexico. Ecology: Nests in ground, uses 



leaf-cuttings from Spiraea and Trifolium, but also accepts trap-nests for nesting. Pollen: 

 Unknown, but visits a wide variety of flowers, notably of the family Compositae, 

 including Agoseris, Asclepias, Aster, Baccharis, Boltonia, Brassica geniculata, 

 Calycadenia multiglandulosa, Ceanothus, Centaurea melitensis, C. solstitialis, 

 Cephalanthus, Chrysanthemum, Chrysotham7iHs, Cirsiu7n, Clarkia williamsonii. 

 Coreopsis grandiflora, C. lanceolata, C. tinctoria, Corethrogyne, Encelia farinosa, 

 Ericameria parishii, Erigeron pygmaeus, Eriophyllnm confertiflorum, Gaillardia 

 pulchella, Gilia, Gossypium, Grindelia camporum, Gutierrezia califomica, G. sarothrae, 

 Haplopappus squarrosus, H. vemonioides, Helenium bigelovii, Heliayithus annuiis, H. 

 atrorubens, H. gracilentus, H. nuttallii, H. petiolaris, Heliopsis, Hemizonia lobbii, H. 

 wrightii, Heterotheca grandiflora, H. subaxillaris, Hypericum, Lepachys, Lotus 

 scoparius, Malacothrix tenuifolia, Medicago sativa, Melilotus alba, Palafoxia linearis, 

 Phaseolus, Petalostemon, Ratibida, Rudbeckia, Senecio douglasii, silphium, 

 Stephanomeria exigua, Verbena, Verbesina, Viguiera, Xanthocephalum, Zexmenia. 



Megachile parallela Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 191. S. 



Megachile facunda Cresson, 1872. Amer. Ent. Soc, Trans. 4: 266. 6. N. syn. 



Megachile sexdentata Robertson, 1895. Amer. Ent. Soc, Trans. 22: 125. i. 



Megachile verbesinae Cockerell, 1908. Ann. and Mag. Nat. Hist. (8) 1: 264. 9. 



Megachile (Argyropile) parallela var. rita Mitchell, 1937. Amer. Ent. Soc, Trans. 63: 53. 9. 



Biology: Fischer, 1951. Kans. Ent. Soc, Jour. 24: 49-50 (nest). — Medler and Lussenhop, 1968. 

 Wis. Univ. Res. Bui. 274: 26 (nest). 

 rossi Mitchell. Ariz. Pollen: Unknown, but visits flowers of Aster, Bidens, Cercidium, Encelia, 

 Verbesina, Viguiera. 

 Megachile (Argyropile) rossi Mitchell, 1943. Pan-Pacific Ent. 19: 14. 9. 

 sabinensis Mitchell. Ariz., Tex. Pollen: Unknown, but visits flowers of Aster, Baileya, 

 Eriogonum, Haplopappus, Helianthus. 

 Megachile (Argyropile) sabinensis Mitchell, 1934. Amer. Ent. Soc, Trans. 59: 348. 9. 

 Megachile (Xeromegachile) pararubi Mitchell, 1957. Pan-Pacific Ent. 33: 21. 9. 

 subparallela Mitchell. Ariz. Ecology: Nests in ground under Brayulinea densa, uses entire 

 leaves of Desmodium for cell construction. Pollen: Unknown, but visits flowers of 

 Eriogonum, Haplopappus, Heterotheca. 

 Megachile (Argyropile) subparallela Mitchell, 1944. Pan-Pacific Ent. 20: 132. 6. 

 townsendiana Cockerell. N. C. to Fla., west to Okla., Tex., Colo., N. Mex., Ariz., and southeast. 

 Calif., Mexico. Ecology: Nests in sandy soil. Pollen: Unknown, but visits flowers of 

 Actinella, Baileya pleniradiata, Chrysopis, Encelia frutescens, Geraea canescens, 

 Helianthus debilis, Hoffmanseggia, Medicago sativa, Melanthera parviflora, Prosopis, 

 Verbesina, Wislizenia refracta. 

 Megachile townsendiana Cockerell, 1898. Ann. and Mag. Nat. Hist. (7) 1: 129. 6. 



