258 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



cell is relatively large, not strongly acute as in many genera. The 

 really diagnostic characters are italicised. The bend in the basal 

 nervure seems to be a normal feature; if so, it is another useful 

 character. 



Type. — Eopimpla grandis, new species. 



EOPEMPLA GRANDIS, new species. 



Plate 36, fig. 7. 



Female. — Length about 14.5 mm. (excluding ovipositor); length 

 of thorax about 4.25 mm.; anterior wing from base to end of stigma 

 about 8 mm., probable total length of wing about 12 mm.; length of 

 stigma about 1.8 mm.; lower end of basal nervure to transverse- 

 cubital about 4.5 mm., and lower end of basal to basal corner of 

 marginal cell 3 mm,; width of petiole of abdomen about 1 mm. 

 Head and thorax black; abdomen so far as visible light ferruginous, 



tne base of petiole fuscous; 

 terebra (only parti}'' preserved) 

 dark; antennse pallid; wings 

 hyaline, with ferruginous ner- 

 vures and stigma. 



Type. — Green River (Eo- 

 cene) shales, "Cathedral Blufl's 

 South of Little Tommies Draw, 

 at point where samples were 

 taken." (Winchester 17-5, 

 U.S.G.S.) The fly Dicranomyia primitiva Scudder (pi. 35, fig. 1 ) comes 

 from the same phice. 



Holotype.— Cat. No. 66581 U.S.N.M. 



The shape of the end of the first brachial cell is approached in 

 Ischnocerus, and the end of the cell with the subdoscoideus recalls 

 the arrangement found in certain ants. 



PIMPLA EOCENICA Cockerell. 



Plate 36, fig. 8. 

 Pimpla eocenica Cockerell, Entomologist, vol. 52, 1919, p. 122. 



Head and thorax 3.5 mm. long, abdomen about 4.5 mm.; terebra 

 projecting 1.95 mm. beyond abdomen. Anterior wmg 6.5 mm. long; 

 width (depth) of marginal cell 655^«; length of basal nervure 690/<; 

 width (depth) of stigma 400//; length of areolet 512/^. 



U. S. G. S., Winchester's F 174. Spring at head of Little Duck 

 Creek, Colorado. 



Holotype.—Csit. No. 665S2, U.S.N.M. 



Family BRACONIDAE. 



EOBRACON, new genus. 



Small species with well developed wings; head and thorax ordinary; 

 mandibles not clearl}^ seen, but certainly not as in Alysiidae; antennae 



Fig. 10.— Eopimpla grandis. Parts of body and 



WING. 



