NiORTH AMERICAN TETRASTICHUS — BURKS 585 



propodeum, paraspiracular carinae wanting; propodeal spiracles 

 large, almost touching anterior margin; gaster narrow and acutely 

 pointed, almost twice as long as thorax. 



Male. — Unknown. 



Type locality. — Ames, Iowa. 



Types.— U.S.N.M. No. 20965. 



Host. — Unknown. 



Distribution-. — Iowa . 



Remarks. — Known only from the two type specimens. 



TETBASTICHUS MALOPHILUS, new species 



Very dark, iridescent blue, with antennal flagellum, apices of 

 femora, tibiae, basal segments of tarsi, and all bristles and pubescence 

 white or light yellow. 



Female. — Length, 0.8-1.0 mm. Antennae inserted at level of ventral 

 margins of compound eyes ; scape short, its apex reaching a point only 

 two-thirds the distance from clypeal margin to anterior ocellus; pedicel 

 and first two funicle segments each equal in length, third segment 

 one-fifth shorter, funicle segments as wide as long; club as long as 

 first two funicle segments; length of postocellar line three times as 

 great as ocellocular. Spiracles clearly visible at posterolateral angles 

 of pronotum ; mesopraescutum wider than long and bearing one or two 

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

 with two dorsal bristles ; apex of hindwing blunt, fringe at posterior 

 margin one-fourth as wide as wing at hamuli. Surface of propodeum 

 slightly roughened, faint median carina present ; mesal length of pro- 

 podeum one-fifth greater than length of postscutellum, and one-third 

 as long as mesoscutellum ; propodeal spiracles separated from anterior 

 margin by a space equal to diameter of a spiracle; gaster globose 

 (flattened in dry specimens), as long as thorax. 



Male. — Unkown. 



Type locality. — Milford Center, Ohio. 



Types.— U.S.N.M. No. 56257. 



Described from the female holotype and 4 female paratypes reared 

 from the apple flea weevil, Orchestes pallicornis Say, June 24-25, 1930, 

 by J. S. Houser. 



TETRASTICHUS BRUCHOPHAGI Gahan 



Figures 17, d; 21, / 



Tetrastichus bruchophagi Gahan, Proc. U. S. Nat. Mus., vol. 46, p. 349, 1913. — 

 Urbahns, Journ. Agr. Res., vol. 8, p. 277, 1917.— Williamson, Minnesota Rep. 

 State Ent. No. 17, p. 106, 1918.— Gahan, Ann. Ent. Soc. Amer., vol. 12, p. 167, 

 1919.— Urbahns, U. S. Dept. Agr. Dept. Bull. 812, p. 17, 1920— Swezey, Proc. 

 Haw. Ent. Soc, vol. 7, p. 383, 1931.— Nikol'skata, Plant. Prot. (Russian), 



530798—43—6 



