576 PROCEEDINGS OF THE NAiTlOiXAIL MUSEUM vol. 93 



praescutum slightly wider than long and bearing two bristles at each 

 lateral margin ; submarginal vein of f orewing with two or three dorsal 

 bristles ; apex of hindwing acute, fringe at posterior margin two-thirds 

 as wide as wing at hamuli. Propodeum very faintly sculptured, almost 

 smooth, well-defined median carina present; mesal length of pro- 

 podeum one-iif th length of mesoscutellum ; propodeal spiracles minute, 

 not quite touching anterior margin ; gaster narrow, elongate, twice as 

 long as thorax. 



Male. — Length, 1.2-1.3 mm. Scape enormously enlarged, and lack- 

 ing a darkened anterior carina ; first f unicle segment as long as pedicel, 

 three apical funicle segments equal in length and each two-thirds as 

 long as first, funicle segments nearly quadrate and without conspicu- 

 ously long bristles, club as long as three distal funicle segments com- 

 bined, gaster one-third longer than thorax. 



Type localities. — Mount Holly Springs and Carlisle, Pa. 



Types.— U.S.N.M. No. 43916. 



Host. — Eggs of tree cricket, Oecanthus sp. 



Distribution. — Pennsylvania, South Carolina, Texas. 



Remarks. — This variety is only doubtfully distinct from the Euro- 

 pean form. 



TETRASTICHUS VENUSTUS Gahan 



Tetrastichus venustus Gahan, Proc. U. S. Nat. Mus., vol. 48, p. 168, 1914. — 

 Uebahns, U. S. Dept. Agr. Bull. 812, p. 18, 1920.— Nikoi/skaya, Rev. Ent. 

 U. S. S. R., vol. 25, p. 119, 1933. 



Female yellow with variable greenish-brown iridescent spots; most 

 of head, dorsum of pronotum, areas outlining sutures on dorsum of 

 thorax, tegulae, prepectus, metanotum, apices of coxae, trochanters, 

 femora (except variable areas near bases), basal segments of tarsi, and 

 base and variable lateral areas of gaster yellow. Male usually almost 

 entirely iridescent brownish green. 



Female. — Length, 1.3-1.8 mm. Antennae inserted at level of ventral 

 margins of compound eyes; apex of scape reaching level of vertex; 

 first funicle segment one-fifth longer than pedicel, second and third 

 segments combined equal in length to club ; length of malar space two- 

 thirds as great as height of compound eye; postocellar line two and 

 one-quarter times as long as ocellocular. Mesopraescutum as long as 

 wide and bearing one row of bristles at each lateral margin ; submar- 

 ginal vein of forewing with three or four dorsal bristles, marginal 

 vein three and one-half times as long as stigmal; apex of hindwing 

 blunt, fringe at posterior margin one-fifth as wide as wing at hamuli. 

 Surface of propodeum very faintly reticulated, paraspiracular 

 carinae absent, mesal length of propodeum one-third as great as length 

 of mesoscutellum, propodeal spiracles contiguous with anterior margin 

 of propodeum ; gaster one and three-fourths times as long as thorax. 



