1872 Hymenoptera in America North of Mexico 



angustifolia, S. emoryi, S. orcutti, but visits other flowers for nectar including Baileya 



multiradiata, B. pleniradiata. 

 Hypomacrotera andradensis Cockerell, 1937. Amer. Mus. Novitates 948: 3. 9 , 6. 

 subalpinus subalpinus (Cockerell). N. Mex., Ariz.; Mexico (Sonora). Parasite: Oreopasites sp. 



Pollen: Collects pollen from the flowers of Spkaeralcea including S. ambigua, S. orcutti. 

 Calliopsis subalpinus Cockerell, 1894. Ent. News 5: 235. 6. 

 Calliopsis seminifus Cockerell, 1896. Ent. Monthly Mag. 32: 219. 9. 



Biology: Rozen, 1970. Amer. Mus. Novitates 2416: 2-5, table 1 (nest architecture, nesting 

 habits, pollen source, parasite). 



Genus XENOPANURGUS Michener 



Xenopanurgus Michener, 1952. Kans. Ent. Soc, Jour. 25: 24. 



Type-species: Xenopanurgus readioi Michener. Orig. desig. 



Taxonomy: Shinn, 1964. Ent. News 75: 73-78 (included sp.). 

 readioi Michener. Ariz. (Huachuca Mts.); Mexico (Toluca). 



Xenopanurgus readioi Michener, 1952. Kans. Ent. Soc, Jour. 25: 25, 5 figs. S. 



Taxonomy: Shinn, 1964. Ent. News 75: 74-78. 9, cj. 



Genus PERDITA Smith 



This is a very large genus of pollen-collecting bees that has estabhshed through its component 

 species a predominantly oligolectic relationship with the flora of North America. Even though 

 the genus occurs transcontinentally in southern Canada, the United States and Mexico to as far 

 south as Central America (Guatemala), it is centered in the more arid areas of northern Mexico 

 and adjacent southwestern United States. The nesting habits of only a few species have been 

 studied and these, like other species of the family, make their nests in the ground, although one 

 species, Perdita (Cockerellula) opuntiae Cockerell, is known to excavate its nests in sandstone. 

 Several females of at least some species occupy a single nest, but there is no evidence of caste 

 development. 



In recognition of utilitarian advantages, the subgenera are arranged alphabetically in this 

 catalog. 



Revision: Cockerell, 1896. Acad. Nat. Sci. Phila., Proc. 48: 25-107. —Cockerell, 1922. Amer. 

 Mus. Novitates 33: 14 (partial key). — Timberlake, 1954. Calif. Univ. Pubs. Ent. 9: 345-432, 

 172 figs, (all subgenera except Hexaperdita Timberlake, Perditella Cockerell, Alloperdita 

 Viereck, and typical Perdita Smith). —Timberlake, 1956. Calif. Univ. Pubs. Ent. 11: 

 247-350, figs. 173-367 (treats subgenera Alloperdita Viereck, Perditella Cockerell, 

 Hexaperdita Timberlake, and Pygoperdita Timberlake). —Timberlake, 1958. Calif. Univ. 

 Pubs. Ent. 14: 303-410, figs. 368-521 (treats zonalis and halictoides groups of subgenus 

 Perdita). —Timberlake, 1960. Calif. Univ. Pubs. Ent. 17: 1-156, figs., 522-732 (treats 

 octomaculata group of subgenus Perdita). — Timberlake, 1962. Calif. Univ. Pubs. Ent. 28: 

 1-124, figs. 733-904, 2 text figs, (treats ventralis group of subgenus Perdita, and suppl. to 

 Parts I-IV). —Timberlake, 1964. Calif. Univ. Pubs. Ent. 28: 125-388, figs. 905-1190, 77 text 

 figs, (treats sphaeralceae group of subgenus Perdita). — Timbelake, 1968. Calif. Univ. 

 Pubs. Ent. 49: 1-196, figs. 1191-1360, 31 text figs, (suppl. to preceding parts, bibliography, 

 index to Parts I-VII, corrigenda). —Timberlake, 1971. Calif. Univ. Pubs. Ent. 66: 1-63, figs. 

 1361-1417 (suppl. to Parts I-VII, treats subgenera Cockerellia, Epimacrotera, 

 Hexaperdita, Pentaperdita, Perdita, Procockerellia, Pygoperdita, Xeromacrotera). 



Taxonomy: Cockerell, 1922. Amer. Mus. Novitates 33: 1-15 (west. U. S. spp., species 

 formation). —Timberlake, 1952. Ent. Soc. Wash., Proc. 54: 199-204 (eastern U. S. spp.). 

 —Timberlake, 1953. Kans. Univ. Sci. Bui. 35: 961-985 (treats spp. of the subgenera 

 Cockerellia, Cockerellula, Macroteropsis, Xerophasma). —Mitchell, 1960. N. C. Agr. Expt. 

 Sta. Tech. Bui. 141: 295-330, figs. 58, 72-79, table 9 (eastern U. S. spp.). —Rozen, 1966. 

 Amer. Mus. Novitates 2259: 5, 16-21, figs. 41-54 (larvae). —Yager and Rozen, 1966. Amer. 

 Mus. Novitates 2265: 12 (pupae). 



