Superfamily APOIDEA 1981 



other flowers including Abro7i.ia, Astragalus, Baileya, Calycoseris, Cryptantha, 

 Eynophyllum, Escliscliolzia, Gemea, Maiva, Nama, and Pliacelia for nectar. 

 Hesperapis wihnattae Cockerell, 1933. Pan-Pacific Ent. 9: 26. 9. 



Taxonomy: Michener, 1936. Ent. News 47: 184. 6. 



Subfamily MACROPIDINAE 



Genus MACROPIS Panzer 



Revision: Michener, 1938. Psyche 45: 133-135. 



Genus MACROPIS Subgenus MACROPIS Panzer 



Megilla Fabricius, 1804. Systema Piezatorum, p. 328. 



Type-species: Megilla labiata Fabricius. Desig. by Westwood, 1840. 

 Macropis Panzer, 1809. Faunae Ins. German., h. 107, No. 16. 



Type-species: Megilla labiata Fabricius. Monotypic. 



This is the only subgenus present in North America, and all of the species are believed to be 

 oligolectic on flowers of Steironema. 



ciliata Patten. Wis. to Que. and Maine south to Ga. Pollen: Unknown, but visits flowers of 

 Apocynum, Hoiistonia, and Hydrangea. 

 Macropis ciliata Patton, 1880. Ent. Monthly Mag. 17: 31. 9. 

 clypeata Swenk. Nebr. 



Macropis clypeata Swenk, 1907. Ent. News 18: 293. 6. 

 longilingua Provancher. Que. 



Macropis longilingua Provancher, 1888. Addit. Corr. Faune Ent. Canada, Hym., p. 424. 9. 

 nuda (Provancher). Colo., Mont., and south. Canada to N. Y., New England States and N. S. 

 Pollen: Unknown, but has been taken at flowers of Apocynum, Geranium, Rubus, and 

 Vaccinium. 

 Eucera nuda Provancher, 1882. Nat. Canad. 13: 174. 9. 

 Macropis (Macropis) morsei Robertson, 1897. Acad. Sci. St. Louis, Trans. 7: 338. 6,9. 



Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 527 (tax. status, synonymy). 

 pateliata Patton. Vt. to N. C, west to Nebr., and Mo. Pollen: Oligolectic on flowers of 

 Steironema. 

 Macropis pateliata Patton, 1880. Ent. Monthly Mag. 17: 33. 6. 



steironematis opaca Michener. Wash. 



Macropis steironematis opaca Michener, 1938. Psyche 45: 134. <J. 

 steironematis steironematis Robertson. Iowa and Mo. to Va., N. C, and Ga. Pollen: 



Presumably oligolectic on flowers of Steironema, but has been taken at flowers of 

 Apocynum, Ceanothus, Melilotus, and Seriocarpus. 

 Macropis steironematis Robertson, 1891. Amer. Ent. Soc, Trans. 18: 63. 9, 6. 



Family MEGACHILIDAE 



This is one of the largest families of bees and is represented by about an equal number of spe- 

 cies in each of the six zoogeographic regions. It is morphologically the most uniform and discrete 

 familial assemblage within the Apoidea. While many of the characteristics of this family are 

 shared with other families of bees and to a lesser extent with the Sphecoidea, the Megachilidae 

 also possess many characteristics in common with the Scolioidea. 



The family is composed of three subfamilies, the Fideliinae and Lithurginae which are all pol- 

 len-collecting bees, and the Megachilinae which are predominantly pollen-collecting species, but 

 which contain several genera that are cleptoparasitic mainly in the nests of other megachilids. 

 The Fideliinae are found only in Chile and South Africa, but both of the other subfamilies are 

 nearly cosmopolitan and are well represented in America north of Mexico. Most of the pol- 

 len-collecting species do not make their own burrows, but appropriate a wide variety of 

 pre-existing burrows, holes, shells and other cavities or construct their nests either in the open 



