MEGACHILIDAE 489 



Integra Cresson. On flowers of Erigeron, Galactia, Glycina, Koellia, Pha- 

 seolus, and Stro'phostyles. 



integrella Mitchell. On flowers of Hypericum and Oxydendrum. 



*macncilli Mitchell. Calif. (Riverside Co.). 



Megachile (Xeromegachile) macneilli Mitchell, 1957. Pan-Pacific Ent. 

 33: 24. $. 



maurata Mitchell. On flowers of Encelia, Sphaeralcea. 



mojavensis Mitchell. Ariz. On flowers of Aster. 



mucorosa Cockerell. Ariz. On flowers of Helianthus. 



nevadensis Cresson. La. (Winnfield). 



palmensis Mitchell. Ariz. 



*pararubi Mitchell. Ariz. (Roosevelt Lake). 



Megachile (Xeromegachile) pararubi Mitchell, 1957. Pan-Pacific Ent. 

 33: 21. $. 



♦pseudolegalis Mitchell. Calif. (Riverside Co.) . 



Megachile (Xeromegachile) pseudolegalis Mitchell, 1957. Pan-Pacific 

 Ent. 33: 22. 5. 



rubi Mitchell. Fla. On flowers of Crataegus, Cuscuta, Ilex, Ruhus, and Sene- 

 cio. 



*stoddardensis Mitchell. Calif. (San Bernardino Co.). 



Megachile (Xeromegachile) stoddardensis Mitchell, 1957. Pan-Pacific 



Ent. 33: 25. $. 



subnigra angelica Mitchell. Ariz. On flowers of Aster. 



subnigra subnigra Cresson. Utah (Navajo Lake). 



MEGACHILE subgenus ARGYROPILE Mitchell, p. 1179 



parallela parallela Smith. On a number of flowers, principally Compositae, 

 and Leguminosae. 



townsendiana Cockerell. On flowers of Actinella, Chrysopsis, Helianthus, and 

 Melanthera. 



MEGACHILE subgenus XANTHOSARUS Robertson, pp. 1179-1180 



armata Smith. Ariz., N. Mex., Mexico. Delete from synonymy of comata 

 Cresson (Sup 1, p. 245) ; armata is a valid sp. (teste T. B. Mit- 

 chell, based on examination of type). 



comata Cresson. Delete armata Smith, a valid sp., from synonomy (Sup. 1, 

 p. 245). 



latimanus Say. Visiting' many flowers, particularly in Compositae, Legumin- 

 osae and Labiatae. 



perihirta Cockerell. ? Mich. On flowers of Aster, Cirsium, Cleome, Epilo- 

 bium, Eriogonum, Helianthus, Melilotus, and Trifolium. 

 Biology: Hobbs, 1957 (1956). Canad. Ent. 88: 625-631. 



MEGACHILE subgenus LEPTORACHIS Mitchell, p. 1180 



petulans Cresson. Visits numerous flowers, especially Compositae, Legumino- 

 sae, and Labiatae. 



MEGACHILE subgenus PSEUDOCENTRON Mitchell, p. 1180 



pruina pruina Smith. On flowers of Asclepias, Crotalaria, Croton, Cuscuta, 

 Dalhergia, Gaillardia, Galactia, Helianthus, Melanthera, Ociimim, 

 Rhus, Strophostyles and Veronia. 



MEGACHILE subgenus ACENTRON Mitchell, p. 1180 



albitarsis Cresson. Mich., Ind. Visits a number of flowers, principally in 

 Compositae and Leguminosae. 



