164 PROC. ENT. SOC. WASH., VOL. 21, NO. 7, OCT., 1919 



Thorax polished, nearly glabrous; mesoscutum without a median dimple 

 posteriorly, and without parapsidal grooves except at the extreme anterior 

 lateral angles where they are barely indicated; transverse groove separating 

 mesoscutum and scutellum foveolate; mesopleural impression weak and 

 smooth; propodeum polished medially, distinctly though finely sculptured 

 laterally; forewing with the stigma long and narrow; first radial abscissa 

 very short, not much longer than thick, second abscissa nearly twice the 

 first intercubitus, third abscissa distinctly longer than the first and second 

 combined and attaining the wing margin considerably before the extreme 

 wing-apex; recurrent vein nearly interstitial; second cubital cell narrowing 

 apically; first brachial cell closed at apex. Abdomen as long as the thorax; 

 first tergite granularly opaque and without carinae; coalesced second and 

 third tergites without a distinct separating suture, weakly sculptured on the 

 basal half, with two short oblique furrows diverging from middle of the 

 anterior margin, posterior half and all of the following tergites smooth; tip 

 of ovipositor barely visible from above. Black; scape, mandibles, palpi, 

 legs including all coxae, first tergite and greater part of the coalesced second 

 and third tergites pale reddish testaceous; abdomen except as noted blackish 

 brown; tarsal claws black, hind tibiae and tarsi slightly fuscous; wings hyaline, 

 veins and stigma dark brownish. 



Male. Similar in every way to the female, the allotype antennae 23- 

 jointed. 



Type locality. Greenwood, Mississippi. 



Type Cat. No. 22734, U. S. Nat. Mus. 



Three females and one male reared from dipterous leaf-miner 

 on cowpeas, July 31, 1916, by C. F. Turner and recorded under 

 Greenwood No. 385. The species is named for the collector. 



Opius downesi, new species. 



This species runs in the writer's classification of the Opiinae 

 (1. c.) to category 48 of the key to females of the genus Opius 

 but does not agree with either alternate on account of the ovi- 

 positor which is exserted distinctly more than half the length 

 of abdomen. It also differs from all of the species included under 

 category 48 of the key by the fact that the mesoscutum has a 

 deep, nearly circular median impression posteriorly in front of 

 the scutellum. 



Female. Length 3 mm. Head viewed from above more than twice as 

 broad as long; ocellocular line about three times the diameter of the lateral 

 ocellus; vertex and frons polished; face polished, sparsely hairy, with very 

 faint setigerous punctures and a distinct median longitudinal ridge; malar 

 space slightly shorter than the width of mandible at base; mandibles fitting 

 close to clypeus, without an opening between; eyes moderately large, ovate; 

 antennae inserted above the middle of face, 36-jointed in the type. Thorax 



