180 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 43. 



DEROSTENUS PUNCTIVENTRIS, new species. 



Female. — Length about 1 min. Green, ^\■itil tints of bronzy show- 

 ing in certain lights on the scutellum and apex of mesosciitum; broad 

 apical margins of the abdominal segments black, strongly contrast- 

 ing w'ith the green of the rest of the segments; antennae brown, 

 first and second joints of funicle subequal in length, about as long as 

 pedicel; club, not counting the terminal spine, about one-third 

 longer than the two-jointed funicle, distinctly three jointed, the last 

 with a spine as long as the segment; face above transvei'se fiurow 

 with shallow thimble-hke punctures, these extending back of ocelU; 

 mesonotum with shallow thimble-hke punctures, these becoming 

 more shallow and indistinct on scuteUum; metanotum and propo- 

 deum with sculpture similar to that at apex of scutellum; the sculp- 

 ture on the propodeum extending laterad to a furrow which is laterad 

 of the spiracle; propodeum without median carina or lateral folds; 

 wings with a muiute fuscous spot caudad of the stigmal veins; th? 

 post-marginal vein short, the stigmal knob subsessile but greatly elon- 

 gate; coxaB and trochanters ,dark, femora black with the bases and 

 apices whitish; anterior tibiae testaceous; middle and hind tibia? 

 yellowish-white, with a brown annulus near base; tarsi concolorous 

 with tibiffi and with dark tips; abdomen with small crowded punc- 

 tures almost resembhng thimble-hke punctures. 



Male. — ^Unknown. 

 * Type-locality. — Salt Lake City, Utah. 



Specimens received from the Bureau of Entomology, United States 

 Department of Agriculture, under Webster note No. 6639, C. X. 

 Ainshe, collector; reared from Agromyza. 



Type.— Cat. No. 14790. U.S.X.M. 



DEROSTENUS PICTIPES, new species. 



Female. — ^Length hardly 1 mm. Similar in color and sculpture to 

 the above but the sculpture of the mesonotum stronger, wings with- 

 out a stigmal cloud, front femora, except tips, greenish; middle legs, 

 except coxae, yellowish- white; hind tibiae without an annulus near 

 base; sculpture of abdomen coarser than in the preceding species; 

 apical margins of abdominal segments nari'owly obscurely brownish, 

 not strongly contrasting. 



Male. — ^Abdomen and hind legs missing; length of head and 

 thorax 0.5 mm. Color and sculpture as in female; scape enormously 

 swollen and sculptured about as mesoscutum; front and middle legs 

 colored as in female. 



Type-locality. — ^Fort Collins, Colorado. 



Specimens received from the Bureau of Entomology. United 

 States Department of Agriculture, under Webster note No. 6646, 

 with the additional data, C. N. Ainshe, collector, reared from mines 

 on Hordeum. 



Type.—C&t. No. 14789, U.S.N.M. 



