COLLETIDAE 423 



Hylaeus ziziae (Robertson) (syn. by Mitchell, 1960, loc. cit. supra, p. 63). 

 Hylaeus alhertensis Cockerell, n. syn. {teste R. R. Snelling, personal 



communication) . 

 Hylaeus dunniugi (Cockerell), n. syn. {teste R. R. Snelling, personal 



communication) . 



affeerfcnsis Cockerell. Syn. of affinis (Smith). 



*azteous (Cresson). Ariz.; Mexico (Baja Calif., Veracruz). 



Prosopis azteca Cresson, 1869. Boston Soc. Nat. Hist. Proc. 12: 272. ?. 



binghami (Lovell). Syn. of modestus modestus Say. 



calvus (Metz). Oreg. and Calif., east to Nev. and Ariz.; Mexico (Baja Ca- 

 lif.). (Paraprosopis) 



coloradensis (Cockerell). N. Mex. and Wyo. west to Calif, and B. C. {Para- 

 prosopis) 



confluens (Smith). N. J. to Fla. Visits many flowers. (Prosopis) 



cookii (Metz). Colo., N. Mex., Nev., Calif. Change 5 9 in orig. cit. to $ (? 

 misdet.). (Paraprosopis) 



cressoni cressoni (Cockerell). Visits a great variety of flowers. (Hylaeus) 



Hylaeus cressoni pasadenae (Cockerell), n. syn. {teste R. R. Snelling, 

 personal communication). 



cressoni mesillae (Cockerell) , new status. (Hylaeus) 



Hylaeus mesillae (Cockerell). Reduced to subsp. rank {teste R. R. Snell- 

 ing, personal communication). 



Hylaeus magniclavis (Swenk and Cockerell), n. syn. {teste R. R. Snelling, 

 personal communication). 



cressoni pasadenae (Cockerell). Syn. of cressoni cressoni (Cockerell). 



diver gens (Cockerell). Syn. of wootoni (Cockerell). 



dunningi (Cockerell). Syn. of affinis (Smith). 



ellipticus (Kirby). Widespread in North America. Visits a number of 

 flowers. (Hylaeus) 



episcopalis (Cockerell). A subsp. of rugulosus (Cockerell). N. B., coquiWeMii 

 (Cockerell) is removed from syn. of episcopalis and assigned as 

 a valid subsp. of rugulosus. 



flammipes (Robertson). Fla. (Citrus Co.). (Prosopis) 



floridanus (Robertson). Minn., Mich., 111., Ky., N. C, Ga., Fla. On flowers of 

 Erigeron, Ilex, Polygonella, Pyracantha, Aster, Solidago, Cornus 

 and EulopJuis. (Paraprosopis) . . 

 Hylaeus modestus modestus Say, in part. Prosopis floridanus is a valid sp. 

 and eulophi Robertson is a syn. of it {teste Mitchell, 1960, loc. cit. 

 supra, p. 77) . 



*formosus Krombein. Fla. (Key Largo, Stock Is.) ; West Indies (Bahamas). 

 On flowers of Metopium toxiferum. 

 Hylaeus formosus Krombein, 1953. Amer. Mus. Novitates 1633, p. 19. 9. 

 *Hylaeus metopii Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bull. 141: 

 80. 9. N. syn. (based on comparison of type material by K. V. 

 Krombein). 



georgicus (Cockerell). N. Y., N. C. On flowers of Pyracantha and Cra- 

 taegus. (Paraprosopis) 



giffardiellus Cockerell. A subsp. of rugulosus (Cockerell). 



graenicheri Mitchell. On flowers of Flaveria and Metopium. 



grossicornis (Swenk and Cockerell). Tex. east to N. C. and north to Minn., 

 Wis., Mich. Visits flowers of Crataegus, Daucus and Pyracantha. 

 (Hylaeus) 



illinoisensis (Robertson). 111. and W. Va. to N. Y., Mass., Maine. Visits 

 many flowers. (Prosopis) 



