BEES OF THE FAMILY ANDRENIDAE— TIMBERLAKE 411 



equaling the next three joints together. Head and thorax opaquely- 

 sculptured. Clypeus and sides of face below antennae with close, 

 shallow punctures. Frons finely striate. Thorax granular-tessel- 

 late and indistinctly punctured. Basal area small, triangular, 

 minutely tessellate. Remainder of propodeum and abdomen with 

 minute, craterlike, setigerous punctures. Second submarginal 

 cell quadrate, half as long as the third, and receiving the recur- 

 rent nervure at the middle. Floccus on each side of propodeum 

 rather short and nearly straight, the pleural surface beneath 

 with shorter and scattered hairs. Flocculus of hind trochanters 

 short and incomplete. Pubescence whitish to ochreous on occi- 

 put, mesonotum and metanotum, and tegulae, otherwise black 

 on the head and thorax, including a tuft of short black hair on 

 tegulae. Hair of abdomen black, erect, moderately long and 

 dense, with some light hair on apical middle of tergite 1, on 

 middle of tergite 2, and on the middle of apical margin of ter- 

 gites 3 and 4. Hair of venter dark. Hair of legs almost entirely 

 dark, the scopa of hind tibiae a little tinged with brown. Hair on 

 inner side of the basitarsi glistening chocolate brown. Tibial scopa 

 moderately long and dense. Facial foveae chocolate brown, when 

 viewed from above, and black in frontal view. Length 8.5-9 mm. ; 

 anterior wing 6.5 mm. 



Ti/TJe.— U.S.N.M. No. 59288. Holotype (female), Berkeley, 

 Calif., February 29, 1934 (R. M. Bohart). 



Paratypes, in the collections of the University of California 

 at Riverside and at Berkeley: 1 female, Berkeley, February 24, 

 1939 (Bohart) ; 1 female, Lindsay, on Amsinckia eastwoodae, 

 April 1, 1933 (Timberlake) ; 3 females, 6 miles west of Tracy, 

 March 4, 1948 (J. W. MacSwain and P. D. Hurd) ; and 14 females, 

 Westley, Stanislaus County, on Brassica, April 1, 1948 (P. D. 

 Hurd) . 



Genus MEGANDRENA Cockerell 



In his recent study of the North American Andrenidae, Lanham' 

 recognizes Megandrena as a good genus and reduces Ancylandrena 

 to subgeneric rank. 



MEGANDRENA (ANCYLANDRENA) LARREAE, new species 



This species agrees with M. atoposoma (Cockerell) in many 

 ways, but differs in having the mesoscutum and abdomen more 

 finely and closely punctured, the pubescence generally fulvous, 

 with little fuscous or blackish hair, and the white lateral face 

 marks of the male triangular. 



Female. — Black, with the tips of mandibles, flagellum beneath, 

 and small joints of tarsi dull ferruginous. Tegulae dark brown. 



» Univ. California Publ. in Ent., vol. 8, pp. 183-238, 1949. 



