1975] 
Barrows — Hylaeus 
77 
Laroca, S. 
1971. Notas sobre a biologia de Hylaeus cecidonastes Moure (Hymen- 
optera, Apoidea). Rev. Brasil. Biol. 32: 285-290. 
Malyshev, S. I. 
1936. The nesting habits of solitary bees (a comparative study). Eos 
11: 201-309. 
Michener, C. D. 
1965. A classification of the bees of the Australian and South Pacific 
Regions. Bull. Amer. Mus. Nat. Hist. 130: 1-362. 
Perkins, R. C. L. in Perkins, R. C. L. and A. Forel. 
1899. Fauna Hawaiiensis or the zoology of the Sandwich (Hawaiian) 
Isles. Vol. 1, Part 1. Hymenoptera, Aculeata. Cambridge Univ. 
Press. 122 pp. 
Smith, F. 
1855. Catalogue of British Hymenoptera: Part 1 Apidae — bees. Lon- 
don. 252 pp. 
Stephen, W. P., G. E. Bohart, and P. E. Torchio. 
1969. The biology and external morphology of bees with a synopsis of 
the genera of northwestern America. Agric. Exp. Station, Oregon 
St. Univ., Corvallis. 140 pp. 
Stoekhert, F. K. 
1933. Die Bienen Frankens (Hym. Apid.) Beiheft Deuts. Entomal. 
Zeit. 1-294. 
