58 U.S. NATIONAL IMUSEUM BULLETIN 2 68 



tegulae low and smooth; enclosure with a hght medial groove and 

 heavily ridged siibparallel to its base; mesosternal tubercle absent; 

 legs all yellow except for variable patches of fulvous mesad on the 

 femori and the slightly darkened tarsi; wings subhyaline with a 

 clouded area over the anterior half; 2nd submarginal cell not petiolate. 



Abdomen with broad yellow bands on terga 1 to 6, sterna 2 and 

 3, a small patch on sternum 1, an interrupted band on sternum 4, 

 and lateral small patches on sternum 5, all of which are yellow; 

 pygidium usual in form (fig. 87f). 



Type. — The holotype female from Antioch, Calif., Aug. 7, 1938 

 (J. W. MacSwain) is at the CaUfornia Academy of Sciences. 



Distribution. — A total of 20 females and 35 males is recorded 

 from Antioch, Calif. One male was taken on Bethel Island near 

 Antioch and one female was taken at Del Puerto Canyon in Stanis- 

 laus County, Calif. This species was found nesting at Antioch by 

 Linsley and MacSwain (see Linsley and MacSwain, 1954). This 

 nesting site has been taken over by industrial expansion and the 

 known nesting site eliminated, A record from Johnnie, Nye County, 

 Nev. is probably an error. Specimens are as follows: 



California: 3? ?, 2crcr, Antioch, Contra Costa County, May 18, 1936, 

 June 8, 1933, June 1, 1939, Sept. 26, 1937 (G. E. and R. M. Bohart) ; ?, cf, 

 same locality. May 21, 1936. Aug. 21, 1938 (E. C. Van Dyke); c?, same locality, 

 May 24, 1949 (E. G. Linsley) ; 2 ? 9 ,^<^<^, same locality. May 24, 1949, July 8, 

 Aug. 9, 1947, Sept. 22, 1954 (P. D. Hurd) ; ? , same locality, June 2, 1940 (B. 

 Brookman); 6cf c?, same locality, June 15, 1952 (Cheng Liang, W. E. La Berge, 

 L. D. Beamer, and A. E. Wolf) ; 9 , same locality, June 30, 1939 (R. M. Bohart) ; 

 9, same locality, June 8, 1950 (J. E. Gillaspy) ; cf, same locality, July 15, 1953 

 (S. Miyagawa) -,1 &&, same locality, July 16, 1953 (R. C. Bechtel, A. D. Telford, 

 A. A. Grigarick); 2cf cf, same locality, July 31, 1959 (J. R. Powers, J. Powell); 

 2 9 9, cf, same locality, Aug. 7, Sept. 4, 1938, Aug. 8, 1952 (J. W. MacSwain); 

 9, d", same locality, Aug. 9, Sept. 10, 1947 (U. N. Lanham); 69 9, same lo- 

 cality, Aug. 9, Sept. 9, 1952 (E. G. Linsley and J. W. MacSwain); 2cf cf, same 

 locality, Aug. 13, 1952 (W. F. Barr); 2cf cT, same locality, Aug. 15, 1954 (H. E. 

 and M. A. Evans) ; 9 , same locality, Sept. 2,, 1938 (G. E. Bohart) ; 9 , same lo- 

 cality, Sept. 9, 1954 (P. Torchio) ; 9 , Del Puerto Canyon, Stanislaus County, 

 May 30, 1959 (F. D. Parker); d", Bethel Island, Contra Costa County, July 4, 

 1958. Nevada. — 9 , Johnnie, Nye County, July 1935. 



Biology. — ^Ijinsley and MacSwain (1954, p. 11) found this species 

 nesting in abandoned burrows of the Hahctine bee, Lasioglossum 

 {Shpecodogastra) aberrans (Crawford). The following prey records 

 are from Linsley and MacSw^ain. 



Prey record. — Dysticheus rotundicollis Van Dyke (Antioch, 

 Calif.). Sitona calijornicus Fahrens (Antioch, Calif). 



Plant record. — Croton calijornicus (California). 



