NORTH AMERICAN TETRASTICHUS — BURKS 529 



segment; marginal vein twice as long as stigmal vein; gaster two- 

 thirds to four-fifths as long as thorax. 



Type locality. — Idlewild, Tex. 



Types.— U.S.N.M. No. 56259. 



Described from the female holotype, male allotype, and 1 male and 

 12 female paratypes reared January 8-April 9. 1891, from small 

 globose leaf galls on live oak, under Bureau of Entomology No. 

 4841 05 . The host is probably Dryophanta emoryi Ashmead. The 

 galls were sent in to the Bureau by L. Biediger. Seven additional 

 specimens of this species, not included in the type series, were possibly 

 reared from the gall of Neuroterus rileyi (Bassett). These latter 

 specimens are from some unknown locality. 



TETRASTICHUS MELANIS, new species 



Figure 19, c 



Shining black; mouth parts, bases and apices of femora and tibiae, 

 and basal segments of tarsi yellow or brown ; teneral specimens dark 

 brown instead of black. 



Female. — Length. 1.3-1.9 mm. Antennae inserted at level of ventral 

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

 ocellus; all funicle segments slightly longer than broad, and equal in 

 length, club slightly longer than two funicle segments; length of malar 

 space two-thirds to three-quarters height of compound eye; postocellar 

 line one and one-half times as long as ocellocular. Mesopraescutum 

 as wide as long (fig. 19, c) and bearing one row of bristles at each 

 lateral margin, median furrow absent; submarginal vein of fore wing 

 bearing one dorsal bristle ; apex of hindwing blunt, fringe at posterior 

 margin one-fourth as wide as wing at hamuli; scutellum sometimes 

 with three pairs of bristles, anterior pair located close to anterior 

 margin. Propodeum shagreened; paraspiracular carinae present; 

 mesal length of propodeum one-third length of mesoscutellum ; propo- 

 deal spiracles large, close to but not quite touching anterior margin; 

 gaster as long as thorax; ovipositor sheaths not reaching apex of 

 abdomen. 



Male. — Length, 1.3-1.4 mm. Darkened anterior carina of scape two- 

 thirds as long as scape, second funicle segment one-fifth longer than 

 first, third and fourth equal in length and each one-half longer than 

 first, club as long as two apical funicle segments; funicle segments 

 bearing bristles approximately as long as segments; gaster slightly 

 longer than thorax ; apex of ninth tergite acute, as in female. 



Type locality. — Wenatchee, Wash. 



Types.— U.S.N.M. No. 56237. 



Described from 36 female and 7 male specimens as follows : Female 

 holotype, male allotype, and 13 female and 2 male paratypes, reared 



