586 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



No. 1, p. 109, 1932.— Swezey, Proc. Haw. Ent. Soc, vol. 8, p. 381, 1934.— 

 Sokenson, Proc. Utah Acad. Sci., Arts, and Letters, vol. 11, p. 241, 249, 1934. — 

 Nikol'skaya, Bull. Cent. Asia. Sci. Res., Cotton Inst. (Russian), p. 120, 1934. 



Bright, iridescent blue ; apices of femora, tibiae, and basal segments 

 of tarsi, light yellow or white ; occasional specimens have the metatibiae 

 darkened; antennal scape sometimes yellow. 



Female. — Length, 1.3-1.6 mm. Antennae inserted ventrad of level 

 of ventral margins of compound eyes ; apex of scape not reaching level 

 of anterior ocellus ; pedicel one-third longer than first f unicle segment, 

 second segment one-sixth longer than first, third one-eighth longer 

 than second ; club one-third longer than second and third f unicle seg- 

 ments combined; length of malar space slightly more than one-half 

 height of compound eye ; postocellar line three times as long as ocel- 

 locular. Mesopraescutum slightly wider than long and bearing two 

 rows of bristles at each lateral margin ; submarginal vein of f orewing 

 with two or three dorsal bristles; apex of hindwing blunt, width of 

 fringe at posterior margin one-fourth width of wing at hamuli ; disk 

 of mesopleuron smooth, prepectus only faintly reticulated. Surface 

 of propodeum smooth or very faintly reticulated, paraspiracular 

 carinae absent; length of mesoscutellum three and one-half times as 

 great as mesal length of propodeum; propodeal spiracles large, not 

 quite touching anterior margin; length of gaster one and one-third 

 times as long as thorax. 



Male. — Length, 1.4 mm. Antennae usually entirely yellow; pedicel 

 one-sixth longer than first f unicle segment, f unicle segments quadrate, 

 second one-sixth longer than first, third and fourth equal in length and 

 each one-eighth longer than second ; setae as long as f unicle segments 

 borne on obscure basal elevations; club one-fifth longer than second 

 and third f unicle segments combined; gaster as long as, or slightly 

 shorter than, thorax. 



Type locality. — Corcoran, Calif. 



Types.— U.S.N.M. No. 16357. 



Host. — The clover and alfalfa chalcid, Bruchophagus funebris 

 (Howard). 



Distribution. — Probably worldwide ; generally distributed in North 

 America and Europe; known also from Argentina. 



TETRASTICHUS MARCO VITCHI (Crawford) 



Ocniocerus marcovltchi Crawford, Proc. U. S. Nat. Mus., vol. 48, p. 580, 1915. — 

 Marcovttch, Ann. Ent. Soc. Amer., vol. 8, p. 170, 1915. — Leonard, New York 

 (Cornell) Agr. Exp. Stat. Mem. 101, p. 984, 1928. 



Brown, with faint bluish iridescent luster, anterior side of scape, all 

 of pedicel but dorsobasal area, ventral side of flagellum, mesal lobe of 

 metanotum, bases and apices of femora and tibiae, and basal segments 



