PROC. ENT. SOC. WASH., VOL. 21, XO. 5, MAY, 1919 1 1 ."i 



of flagellum about three times as long as broad, subequal in length, other 

 joints gradually shorter to apex; notauli shallow but distinct; sternauli deep 

 but ending abruptly in middle of pleura; scutellum slightly convex, immar- 

 gined; propodeum declivous concave behind with prominent laterial angles, 

 basal median area large, nearly as long as areola, areola hexagonal in position 

 but open laterally, though sometimes adventitiously closed by the longi- 

 tudinal rugosity, median longitudinal carinae also lacking behind apical 

 carina; areolation otherwise complete; spiracles small, round, legs slender; 

 stigma narrow, lanceolate, radius slightly before middle; second intercubitus 

 entirely lacking; third discoidal cell very broad at base; nervulus very oblique, 

 strongly recurved below middle ; nervellus strongly antefurcal, sharply broken 

 below middle; first tergite evenly widening from base to apex, not separated 

 into petiole and postpetiole, slightly decurved and strongly arched, almost 

 swollen, above, with strong converging dorsal carinae extending nearly to 

 apex, lateral carinae distinct from base to apex; middle tergites strongly 

 transverse, subcallose apically; ovipositor short, the sheath subclavate. 



Type. Cyrtobasis rogae, new species. 



Cyrtobasis rogae, new species. 



Female. Length 8 mm. antennae 6.5 mm., ovipositor 1.25 mm. 



Head opaque; temples and cheeks polished, sparsely punctured; vertex 

 behind ocelli arcuately rugose; frons above obliquely and below transversely 

 rugose; face finely, densely punctate and pilose; malar space somewhat 

 longer than basal width of mandible; thorax opaque; pronotum and meso- 

 pleura partly polished; pronotum rugoso-punctate ; mesoscutum minutely 

 punctato-shagreened, rugose in region of notauli; scutellum punctate; meso- 

 pleura and sternum densely punctate, more or less rugosely so around margins; 

 metapleura and propodeum densely punctate, basal area polished; abdomen 

 densely, coarsely punctate; first tergite nearly as wide at apex as long, polished 

 between dorsal carinae and at apex, striate at sides; other tergites polished 

 at apex ; second a little more than half as long as wide and with a very shallow 

 broad transverse impression beyond middle, others progressively shorter; 

 ovipositor about as long as first tergite. 



Black; mandibles rufous; palpi, front coxae trochanters, apical external 

 spot on front femur, apical joint of middle trochanter, anterior dorsal margin 

 of pronotum, tegulae, and wing-bases white; hind tibiae at apex and their 

 tarsi black; legs otherwise testaceous; wings hyaline, venation blackish; 

 tergites narrowly piceous at apex; sheath black. 



Host. Rogas spp. 



Type-locality. Flagstaff Mt., Boulder, Colorado. 

 Other localities. Riley County, Kansas, and Lake Forest, 

 Illinois. 



Type. Cat. No. HUTU, U. S. X. M. 



Described from three females; the type reared from a Rogas 



