Superfamily APOIDEA 2119 



Exomalopsis chionocincta Cockerell, 1949. U. S. Natl. Mus., Proc. 98: 453. 9. 



Taxonomy: Cockerell, 1905. Amer. Ent. Soc, Trans. 31: 325. — Michener, 1954. Amer. Mus. 

 Nat. Hist., Bui. 104: 110, figs. 50-52 (synonymy, characters). —Moure, 1960. Studia Ent. 3: 

 114-115 (synonymy, notes on type). 



Biology: Michener, 1974. Kans. Ent. Soc, Jour. 47: 19-22, 4 figs, (nest architecture, nests 

 intermingled with nests of Melitoma leuglossoides; reported as lartnatus). — Torchio, 

 1974. Kans. Ent. Soc, Jour. 47: 54-63, 2 tables (nest architecture, nests intermingled with 

 nests of Melitoma leuglossoides, life history, associates; reported as larmatus). 

 sejunctus Cockerell. Tex., Colo., Ariz. 



Ancylosceles sejuncta Cockerell, 1933. Amer. Mus. Novitates 595: 1. S. 

 Ancylosceles maculifera Cockerell, 1934. Amer. Mus. Novitates 697: 8. 6. 



Taxonomy: Cockerell, 1935. Amer. Mus. Novitates 766: 4. 9 . 



Tribe MELITOMINI 



This tribe is found only in the New World and is represented in America north of Mexico by 

 the genera Diadasia, Melitoma and Ptilothrix. Although species of these genera occupy both 

 continents, only the genus Diadasia contains numerous species in the more arid parts of North 

 and South America. As a group the Melitomini have established a specialized dependency upon 

 the pollens of a limited number of plant families including notably only certain genera in the 

 Cactaceae, Compositae, Convolvulaceae, Malvaceae and Onagraceae. 



Taxonomy: Michener, 1954. Amer. Mus. Nat. Hist., Bui. 104: 128 (generic classification). 



Biology: Linsley, MacSwain and Smith, 1956. South. Calif. Acad. Sci., Bui. 55: 83-101, pi. 26 

 (biological characters). —Linsley and MacSwain, 1952. Calif. Univ. Pubs. Ent. 9: 267-290, 

 pis. 1-6 (biological relationships with Anthophorini). 



Genus PTILOTHRIX Smith 



Ptilothrix Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 131. 



Type-species: Ptilothrix piumatus Smith. Monotypic. 

 Ptilothryx Marschall, 1873. Nomenclator Zoologicus, p. 269. Emend. 

 Emphor Patton, 1879. U. S. Geol. Geog. Survey, Bui. 5: 476. 



Type-species: Melissodes hombiformis Cresson. Monotypic and orig. desig. 

 Energoponus Holmberg, 1903. Mus. Nac Buenos Aires, An. (3) 2: 406. 



Type-species: Ptilothrix piumatus Smith. Desig. by Sandhouse, 1943. 

 (=Energoponus strenuus Holmberg). 



Taxonomy: Moure, 1947. Soc. Ent. Argentina, Rev. 13: 24 (synonymy). 

 hombiformis (Cresson). Kans. and 111. to N. J., south to Tex. and Fla.; Mexico. Pollen: Stores 

 pollen of Hibiscus, but also visits flowers of Althaea, Cephalanthus, Cirsium, Ipomoea, 

 Verbena, Vertionia for nectar. 

 Melissodes bombiforrnis Cresson, 1878. Acad. Nat. Sci. Phila., Proc 30: 219. 9, d. 

 Emphor fuscojubatus Cockerell, 1913. Psyche 20: 107. 9. 



Taxonomy: Michener, 1953. Kans. Univ. Sci. Bui. 35: 1075, figs. 212-218 (larva). —Mitchell, 

 1962. N. C. Agr. Expt. Sta. Tech. Bui. 152: 240-242, fig. 67 (synonymy, redescription). 



Biology: Robertson, 1890. Canad. Ent. 22: 217. — Knab, 1911. Ent. Soc. Wash., Proc 13: 170. 

 -Grossbeck, 1911. N. Y. Ent. Soc, Jour. 19: 238. —Nichols, 1913. Psyche 20: 107 (as 

 fuscojubatus). —Robertson, 1914. Ent. News 25: 70. —Robertson, 1918. Canad. Ent. 50: 

 320. —Robertson, 1925. Psyche 32: 278. —Davis, 1926. Brooklyn Ent. Soc, Bui. 21: 127. 

 — Rau, 1930. Brooklyn Ent. Soc, Bui. 25: 28. — Rau, 1934. Acad. Sci. St. Louis, Trans. 28: 

 222. —Michener, 1947. Amer. Midland Nat. 38: 451 (habits). 

 sumichrasti (Cresson). Ariz. (Marana and Sahuarita); Mexico. Parasite: Dasymutilla 



connectens (Cameron)?, D. eminentia Mickel?, D. foxi (Ckll.)?, D. phoenix (Fox)?, 

 Lytta variabilis Duges, Nemognatha chrysomeloides L. , Pseudomethoca praeclara 

 (Blake)?, Pollen: Stores pollen of Gossypium (cultivated), Ipomoea longifolia, I. pringlei. 



