Superfamily APOIDEA 2055 



aegra Mitchell. South. Tex., south to Brazil. 



Megachile aegra Mitchell, 1930. Amer. Ent. See, Trans. 56: 283. 6. 

 chichimeca Cresson. South. Tex.; Mexico. 



Megachile chichimeca Cresson, 1878. Amer. Ent. Soc, Trans. 7: 130. 9. 



Megachile disparipennis Cockerell, 1917. In W. P. Cockerell, N. Y. Ent. Soc, Jour. 25: 192. 

 9. 



Genus MEGACHILE Subgenus CRESSONIELLA Mitchell 



Megachile subg. Cressoniella Mitchell, 1943. Amer. Ent. Soc, Trans. 59: 302, 307. 

 Type-species: Megachile zapoteca Cresson. Orig. desig. 

 zapoteca Cresson. South. Ariz., south to Costa Rica. Pollen: Unknown, but visits flowers of 

 Asclepias, Helenium, Helianthus, Lathyrus, Melilotus, Monarda. 

 Megachile zapoteca Cresson, 1878. Amer. Ent. Soc, Trans. 7: 128. 9. 

 Megachile tuxtla Cresson, 1878. Amer. Ent. Soc, Trans. 7: 128. S. 



Genus MEGACHILE Subgenus MEGACHILE Latreille 



Megachile Latreille, 1802. Hist. Nat. Formis, p. 413, 433. 



Type-species: Apis centuncidaris Linnaeus. Desig. by Curtis, 1828. 

 Anthophora Fabricius, 1804. Systema piezatorum, p. 372. Preocc. 



Type-species: Apis centuncnlaris Linnaeus. Desig. by Michener, 1951. 

 Anthemois Robertson, 1903. Amer. Ent. Soc, Trans. 29: 168. 



Type-species: Apis centuncnlaris Linnaeus. Monotypic and orig. desig. (=Megachile 

 htfragilis Cresson). 

 Cyphopyga Robertson, 1903. Amer. Ent. Soc, Trans. 29: 169. 



Type-species: Megachile inontivaga Cresson. Monotypic and orig. desig. 

 Megalochila Schulz, 1906. Spolia Hym., p. 64. Emend. 



centuncularis (Linnaeus). Holarctic, in America principally northern, but occurs south to Fla. 

 Mo., Colo., Nev., Ariz. Ecology: Nests both below and above ground in preexisting holes 

 or cavities. Parasite: Coelioxys modesta Sm., C. moesta Cress., C. octodentata Say, 

 Dibrachys sp., Melittobia chalybii, M. megachilidis (Pack.), M onodontomerns 

 montivagns Ashm., Ptinns sp. nr. hirtellns Sturm. Pollen: Apparently polylectic, visits a 

 wide variety of flowers, especially Compositae and Leguminosae; visitation records 

 include Althaea rosea, Aster, Cardnns undulatus, Centaurea cyanns, C.jacea, 

 Epilobinm angustifolin^n, Fendlera, Gladiolus, Grindelia squarrosa, Helianthus 

 annuus, H. maximillianus, Inula heleuium, Medicago sativa, Melilotus alba, M. 

 officinalis, Psoralea, Pyracantha, Sedum, Solidago, Taraxacum taraxacum, Trifolium, 

 Vemo7iia fasciculata. Zinnia. 



Apis centuncularis Linnaeus, 1758. Syst. Nat., Ed. 10, p. 575. 9. 



Apis rotundata Fabricius, 1787. Mantissa Insectorum, v. 1, p. 303. 6. 



Megachile infragilis Cresson, 1878. Amer. Ent. Soc, Trans. 7: 127. 6. 



Megachile leoni Titus, 1906. Ent. Soc. Wash., Proc 7: 150. 9. 



Perezia maura Ferton, 1914. Soc. Ent. France, Ann. 83: 233. Intersex. 



Taxonomy: Kurd, 1967. Ent. Medd. 35: 5-6 (synonymy). — Pasteels, 1969. Soc Ent. France, 

 Bui. 74: 248 (intersex, synonymy). 



Biology: Gentry, 1874. Canad. Ent. 6: 171-175 (nest, supersedure). —Packard, 1874. Guide to 

 the study of insects, 4th ed., pp. 136-137 (nest). —Hicks, 1926. Colo. Univ. Studies 15: 231 

 (nest, as infragilis). — Michelbacher and Kurd, 1954. Pan-Pacific Ent. 20: 146 (nest, 

 parasite). — Medler, 1959. Canad. Ent. 91: 113-115, 1 fig. (nest). — Krombein, 1967. 

 Trap-nesting wasps and bees, pp. 325-326 (life history, nest architecture, parasite). 

 — Medler and Lussenhop, 1968. Wis. Univ. Res. Bui. 274: 20-21 (life history, parasite). 

 -Holm and Skou, 1972. Ent. Scand. 3: 169-180, 6 figs., 8 tables (life history, nest 

 architecture, sex ratio, rate of emergence, parasite, diseases). 

 inermis Provancher. N. S. to Ga., west to B. C, south to Calif., Utah., Colo., N. Mex. and Tex. 

 Ecology: Nests in decaying poplar and in borings in wood. Parasite: Coelioxys fu7teraria 

 Sm., Dibrachys ntaculipennis Szelenyi, Leucospis affinis Say. Pollen: Apparently 



