552 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



length, three following segments equal in length and each one-fifth 

 longer than first, club three times as long as first segment; gaster as 

 long as thorax. 



Type locality. — Vienna, Va. 



Types.— U.S.N.M. No. 56245. 



Described from 20 female and 4 male specimens, all said to have been 

 reared from the goldenrod stem-gall moth, Gnorimoschema gallaesoli- 

 daginis (Riley) : Holotype female and 9 female paratypes, Vienna, 

 Va., May 17, 1911, R. A. Cushman; allotype male and 8 female and 3 

 male paratypes, Richmond, Va., G. W. Barber; 2 female paratypes, 

 New Lisbon, N. J., May 15, 1931, E. P. Darlington. An additional 

 lot of 14 females and 3 males, not included in the type series, were 

 reared from G. gallaesolidaginis at Washington, D. C, March 22, 1886. 

 These specimens were set aside as a new species by Ashmead and bear 

 a manuscript name, but his description was never published. 



Remarks. — Although said to have parasitized the goldrenrod gall 

 moth, this species may actually have come from some parasite or in- 

 quiline associated with that moth. 



TETRASTICHUS TESSERUS, new species 



Shining, jet black ; area of head around mouthparts, base of antennal 

 scape, and most of femora dark brown; bases and apices of femora, 

 tibiae, and tarsi light yellow or white; apices of tarsi sometimes dark- 

 ened; legs of male almost entirely yellow; old or teneral specimens 

 may be brown rather than black. Surfaces of thorax and abdomen 

 with strong, reticulate sculpturing, much as in figure 18, c. 



Female. — Length, 1.6-2.1 mm. Antennae inserted dorsad of level 

 of ventral margins of compound eyes ; apex of scape surpassing level 

 of vertex ; pedicel slightly more than one-half as long as first f unicle 

 segment, second segment four-fifths as long as first, second and third 

 equal in length, club one and one-half times as long as third funicle 

 segment ; length of malar space two-thirds as great as height of com- 

 pound eye; postocellar line slightly longer than ocellocular, inter- 

 ocellar triangle usually with seven large, setigerous punctures. Meso- 

 praescutum short, semiquadrate, as in figure 18, c, one row of bristles 

 present at each lateral margin; submarginal vein of forewing with 

 three or four dorsal bristles, marginal vein four times as long as 

 stigmal; apex of hindwing blunt, fringe at posterior margin one- 

 third as wide as wing at hamuli; surface of propodeum shagreened, 

 but paraspiracular carinae absent or only vaguely indicated, spiracles 

 contiguous with anterior propodeal margin, median length of propo- 

 deum one-third as great as length of mesoscutellum ; gaster twice as 

 long as thorax. 



Male. — Length, 1.6-1.7 mm. Anterior carina of scape extending 

 almost the entire length of scape, pedicel and first funicle segment 



