BEES OF THE FAMILY ANDRENIDAE— TIMBERLAKE 395 



1946; and 2 females (paratypes), Camp Pendleton, 10 miles 

 northeast of Oceanside, San Diego County, on Sanicula bipinnd- 

 tifida, April 22, 1946 (Timberlake), in collection of the Citrus 

 Experiment Station. 



A small series of females from Pine Flat, near California 

 Hot Springs, Tulare County, May 3, 1947 (Timberlake) seems 

 to belong here. These females were taken at flowers of Sanicula 

 tuber osa, except one that occurred at flowers of Rhamnus crocea. 



ANDRENA (MICRANDRENA) RADIALIS, new species 



Similar to A. chlorogaster Viereck, but the male has only a 

 trace of black hair at sides of face, and the genitalia are distinc- 

 tive. The female differs hardly at all, except that the foveae are 

 whitish, and even this character may not always be distinctive. 



Male. — Integument with a dark bluish-green tinge. Clypeus, 

 except the margins, pale yellow, without black dots. Flagellum 

 dark ferruginous beneath, blackish above. Wings slightly dusky, 

 the nervures and stigma dark ferruginous. Antennae long, the 

 middle joints of flagellum much longer than wide, and joint 3 

 shorter than 4. First abscissa of radius very short or puncti- 

 form. Basal area large and broad, finely granular rugulose, more 

 coarsely so at base, where the sculpture is distinctly coarser than 

 that of remainder of propodeum. Pubescence white and moder- 

 ately long and dense on cheeks and pleura. Only a few dusky or 

 blackish hairs on each side of face. Genitalia in general similar 

 to those of chlorogaster, but parameres of stipites less thickened 

 at base, and the apical expansion subtriangular. Compressed api- 

 cal half of sagittae having the two component parts moderately 

 incrassate at the tips, and the dorsal crest of each thin-edged 

 and a little separated just beyond the basal bulbous portion. 

 Length about 5 to 6 mm. ; anterior wing 4.3-4.8 mm. 



Female. — Like chlorogaster, but pubescence white, the facial 

 foveae soiled whitish. Length 6-7 mm. ; anterior wing 4.8-5 mm. 



Tt/pcs.— U.S.N.M. 59280. Holotype (male) and allotype, Elsi- 

 nore, Riverside County, Calif. (Baker) ; another pair (para- 

 types), Redlands (F. R. Cole). 



In the collection of the Citrus Experiment Station are the 

 following paratypes: 107 males, 59 females, Riverside, taken on 

 Salix, Sisymbrium, Brassica, Capsella, Alyssum, Sedum (in cul- 

 tivation), Taraxacum, Sonchu^, Baccharis, Marguerite daisy, and 

 flying near Sambucus, February 16 to April 28; 2 females, 

 Valyermo, Los Angeles County, on Salix, March 26; 1 female, 

 Andreas Canyon, near Palm Springs, on Sisymbrium, March 2; 

 2 males, Soboba Hot Springs, on SoXix, March 11; and 1 male, 



