BEES OF THE FAMILY ANDRENIDAE— TIMBERLAKE 385 



Male. — Similar to the female and difficult to distinguish from 

 the male of A. pallidifovea. Differs from the latter in smaller aver- 

 age size and in the very narrow hair bands of the abdomen, inter- 

 rupted on tergite 2 and usually also on tergite 3. The subdepressed 

 hair on disk of tergite 2 mainly light, but that on disk of tergites 

 3 to 5 black. The genitalia of the two species virtually identical. 

 Length 6.5-9 mm. ; anterior wing 5.5-7 mm. 



Types. — Holotype (female), allotype, and 51 paratypes, from 

 The Gavilan, Riverside County, Calif., April 1 to 30, 1 on Layia 

 elegans, the rest on Baeria; 4 males, 1 female. Riverside, on Baevia, 

 except 2 of the males taken on Cryptantha and Sisymbrium, re- 

 spectively, March 3 to April 6; 1 female. Railroad Canyon, near 

 Elsinore, on Baeria, April 7 (Timberlake) ; and 2 females, Clare- 

 mont (E. 0. Essig), in the collection of the Citrus Experiment 

 Station. The holotype and allotype were taken on Baeria, April 

 10, 1940. 



Paratype, 1 female, 1 male, Mount Hamilton Range, Santa Clara 

 County, Calif., April 26, 1913 (J. C. Bridwell), in the United States 

 National Museum, U.S.N.M. No. 59275. 



This species is dedicated to Prof. E. 0. Essig, who collected 

 specimens at Claremont, presumably while a student at Pomona 

 College. 



ANDREKA (STENANDRENA) VEXABDLIS, new species 



Similar to A. pallidifovea (Viereck), but the female distinguish- 

 able by having the abdomen virtually impunctate, and the male by 

 having antennal joint 4 hardly longer than thick and distinctly 

 shorter than joint 3. , 



Female. — Black, the apical joints of tarsi more or less ferrugi- 

 nous. Flagellum only slightly reddened beneath. Tegulae dark. 

 Wings uniformly dusky hyaline, the stigma dark red, the nervures 

 more ferruginous, except subcosta and margins of stigma, which 

 are blackish. Structural characters and sculpture mostly as in 

 pallidifovea and essigi. Clypeus opaque, generally with the punc- 

 tures very obscure, sometimes with a very fine transverse stria- 

 tion on the upper half of disk. Basal area of propodeum dull, finely 

 granular-tessellate, the sculpture finer than that of remainder of 

 dorsal surface of propodeum. (In pallidifovea the sculpture of 

 basal area usually distinctly coarser than that of remainder of 

 dorsal surface.) Abdomen minutely tessellate, moderately shining, 

 virtually impunctate, although very minute, mostly remote punc- 

 tures become discernible on close inspection. (In pallidifovea the 

 tergites have a close, very minute puncturation, which in essigi 

 becomes much more obvious.) Process of labrum a little larger 



