TWO GENERA OP CHAiLCID-FLIES^ — GAHAN 355 



Anterior femur only slightly swollen ; middle tibia with four short, 

 stiff spines on its apical margin ; calcariiim of middle tibiae two-thirds 

 as long as basitarsiis ; posterior femur and tibia both slender, only very 

 slightly compressed, the femur slightly narrower beyond than before 

 the middle. 



Abdom.en about as long and as broad as thorax, ovate, rounded at 

 apex, distinctly sculptured, and clothed with short, pale hairs except 

 the first and second segments dorsally, wdiich are apparently smooth 

 and bare ; hypopygium extending about to middle of abdomen ; oviposi- 

 tor exserted one-third to one-half the length of abdomen. 



Male.— Length 2.2 mm. Head mostly testaceous, the vertex dull 

 blackish with a slight greenish tinge, and the frons tinted with cop- 

 pery; scape testaceous, flagellum brownish black. Dorsum of thorax 

 mostly dull greenish black, the scapulae anteriorly and laterally, 

 sclerites adjacent to bases of wings, and whole underside of thorax 

 testaceous, the mesosternum and mesopleura with mixed brownish and 

 metallic tints; propodeum with strong metallic green and coppery re- 

 flections; legs including all coxae testaceous, more or less mixed with 

 brownish and with some metallic reflections on middle and hind 

 coxae. Wings hyaline. Abdomen mostly dark with metallic re- 

 flections, basally more or less testaceous. 



Agreeing structurally with the description of the male of opam 

 except in the following particulars: Scape a little less obviously 

 thickened; pedicel no longer than first funicular segment; propodeum 

 with shallow reticulate sculpture, shining; propodeal spiracles dis- 

 tinct but not large ; femur of anterior legs very slightly enlarged, tibia 

 scarcely at all thickened; middle tibial spur fully three-fourths as 

 long as basitarsus and moderately stout ; posterior femur about five 

 times as long as broad ; posterior tibia weakly compressed and about 

 two-thirds as broad as femur. Marginal vein of forewing twice the 

 length of stigmal vein and as long as postmarginal. Abdomen a 

 little shorter and narrower than thorax. 



T-i/pe localifi/.—Urhsina., 111. 



Type.—U.S^-NM. No. 56652. 



Rem-arks. — Described from 7 females (1 holotype) and 6 males 

 (1 allotype) reared from the egg sac of an unidentified spider, Feb- 

 ruary 19, 1922, by A. O. Weese. 



9. ARACHNOPHAGA PICEA (Howard) 



Eupelmus piceus Howard, Proc. Ent. Soc. Washington, vol. 2, p. 296. 1892. 

 Arachnophaga picea Ashmead, Proc. Ent. Soc. Washington, vol. 4, p. 18, 1896. 



Female.— Length. 2-2.75 mm. General color brownish black; scape, 

 mandibles, clypeal area, and thoracic sutures around bases of wings 



