556 PROCEEDINGS OF THE NAiTTONATj MUSEUM vol. 93 



Male. — Length, 0.9 mm. Funicle segments bearing conspicuously 

 long setae on dorsal enlargements near bases ; pedicel one-sixth longer 

 than first funicle segment, second one-third longer than first, third 

 and fourth each as long as second, club as long as last two funicle seg- 

 ments combined; length of postocellar line greater than length of 

 ocellocular line ; gaster shorter than thorax. 



Type locality. — Baton Rouge, La. 



Types.— U.S.N. M. No. 56247. 



Described from 9 female and 2 male specimens as follows : Female 

 holotype and two female paratypes, reared from larva of Chirida 

 signifera (Herbst), August 24, 1921, Guy Fletcher; male allotype and 

 one male and six female paratypes, reared from larva of the golden 

 tortoise beetle, Metriona bicolor (Fabricius), July 1921, C. E. Smith. 



TETRASTICHUS SEMIAURATICEPS (Girault), new combination 



Epitetrastichus semiauraticeps Girault, Proc. U. S. Nat. Mus., vol. 51, p. 127, 

 1916. 



Black with a strong, iridescent blue cast ; supraclypeal area of head, 

 anterior margin of antennal scape, apex of pedicel, tegulae, inner tri- 

 angular part of scapulae, apices of coxae, trochanters, bases and apices 

 of femora, tibiae, and basal segments of tarsi yellow or white; almost 

 entire head may be yellow. 



Female. — Length, 2.3 mm. Antennae inserted slightly dorsad of 

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

 level of anterior ocellus, first and second funicle segments equal in 

 length, third segment slightly shorter than second, club as long as 

 first two funicle segments combined; length of malar space three- 

 fifths as great as height of compound eye; ocellocular line almost as 

 long as postocellar. Pronotum with femoral grooves as in figure 17, e; 

 mesopraescutum as long as wide and bearing one row of bristles at 

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

 dorsal bristles, stigmal vein one-fifth length of marginal; hindwing 

 blunt at apex, fringe at posterior margin one-fifth width of wing at 

 hamuli. Surface of propodeum faintly reticulated, almost smooth, 

 median carina only present; mesal length of propodeum one-fifth 

 length of mesoscutellum ; propodeal spiracles contiguous with anterior 

 margin, minute petiole partly differentiated; gaster one and one-half 

 to one and two-thirds times as long as thorax. 



Male. — Unknown. 



Type locality. — Denver, Colo. 



Type.—U.S.'NM. No. 19643. 



Hosts. — Reared from bud gall on Pinus scopulorum and needle gall 

 on Pirms ponderosa; hosts probably one or more species of midges. 



Distribution. — Arizona, Colorado, Maine. 



