560 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



each lateral margin ; submarginal vein of forewing with four or five 

 dorsal bristles, marginal vein twice as long as stigmal; mesoscutellum 

 ■with four bristles on either side, these bristles usually arranged in a 

 straight row and evenly spaced, but sometimes rather irregular; 

 apex of hindwing blunt, fringe at posterior margin one-sixth to one- 

 seventh as wide as wing at hamuli. Surface of propodeum sha- 

 greened anteriorly, more smooth posteriorly, median, paraspiracular, 

 and oblique carinae present, as in figure 21, d; spiracles almost con- 

 tiguous with anterior margin of propodeum; length of mesoscutellum 

 three and one-half times as great as median length of propodeum; 

 gaster one and one-third times as long as thorax. 



Male. — Length, 1.5 mm. Darkened anterior carina of scape three- 

 fourths as long as scape ; pedicel and each segment of f unicle equal in 

 length, club twice as long as fourth f unicle segment ; f unicle segments 

 semiquadrate, and without long bristles; gaster as long as thorax. 



Type locality. — Victoria, Tex. 



Types.— U.S.N.M. No. 56249. 



Described from 25 female and 2 male specimens, as follows: 

 Female holotype, male allotype, and 1 male and 10 female paratypes 

 from the type locality, reared from Disholcaspis cinerosa (Bassett) 

 gall on live oak (Quercus chrysolepis) , July 1- August 6, 1909, J. D. 

 Mitchell ; 4 female paratypes, Kern County, Calif., reared from gall 

 of Heteroecus pacificus Ashmead, June 30, 1893, under Bureau of 

 Entomology No. 5542; and 10 female paratypes from Oneida, 111., 

 reared from gall of Disholcaspis mamma (Walsh), July 12, 1893, 

 under Bureau of Entomology No. 5724 02 . 



TETRASTICHUS GIGAS, new species 



Iridescent green or blue-green, sometimes ver}' dark, almost black, 

 but always with at least a distinct, iridescent sheen, especially at 

 meson of thoracic notum ; usually base and anterior side of antennal 

 scape, apices of femora, bases and apices of tibiae, and basal segment 

 of middle and hind tarsi light yellow or white; darkened parts of 

 tibiae and tarsi usually tan or brown, lighter than dark parts of 

 femora ; pronotum usually with a faint iridescent bluish or purplish 

 cast. 



Female. — Length, 3.0-4.0 mm. Antennae inserted slightly ventrad 

 of level of ventral margin of compound eyes ; apex of scape reaching 

 level of dorsal margin of anterior ocellus; pedicel and each f unicle 

 segment equal in length, club slightly shorter than two funicle seg- 

 ments combined; length of malar space slightly greater than height 

 of compound eye; postocellar line one and one-half times as long as 

 ocellocular; area of frons dorsad and laterad of scrobe cavity set with 

 numerous short, erect bristles, area immediately ventrad of antennal 



