PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



issued |^|Sv>L sS^ ^^ ^^' 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 



Vol. 101 



Washington : 1951 ^O. 3281 



NEW AND LITTLE-KNOWN BEES OF THE FAMILY 

 ANDRENIDAE FROM CALIFORNIA^ 



By P. H. TiMBERLAKE 



The andrenid fauna of California is extremely rich in species, 

 and many of these are new to science. In the present contribution, 

 22 species or subspecies of Andrena and two species of Megan- 

 drena are described as new, and several old species are redefined, 

 all in the family Andrenidae.^ The species here considered are 

 nearly all represented in a collection of Andrenidae belonging 

 to the United States National Museum and sent to me for study 

 in the fall of 1945. Included in this collection were the types of 

 numerous manuscript species of Viereck, and a few of his names 

 have been adopted in the present paper. 



Genus ANDRENA Fabricius 



ANDRENA (TRACHANDRENA) CALIFORNICA, new gpccies 



This species belongs in a small group of Trachandrena having 

 the hair on outer side of the hind basitarsus more or less black- 

 ened, or at least appreciably darker than the scopal hair of tibia. 

 It differs from A. limarea Viereck in the duller mesoscutum and 

 in the more broadly depressed and more densely punctured second 

 tergite. From A. quintiliformis Viereck it differs in the dull meso- 

 scutum, with the hair much finer and entirely light, and in the less 



» Paper No. 644, University of California Citrus Experiment Station, Riverside. Calif. 

 * Hymenoptera : Apoidca. 



M9186— Bl 373 



