318 . AMERICAN HYMENOPTERA. 



Oils, remainder of legs ferruginous ; wings subhyaline. nervures and stigma brown, 

 paler at base; transverse median and basal nervures interstitial; body pilose, 

 shining; mesouotum broad, without parapsidal grooves; lateral carinse of lueta- 

 thorax distinct; abdomen oval, subclavate; petiole smooth, gradually considerably 

 broadened toward apex, spiracles prominent. 



One specimen from Washington (coll. Amer. Ent. Soc). 



Jflesoleptus striatum n. sp. 



% . — 5 mm. Black, with clypeus, mouth-parts and tegulfp whitish, coxse black, 

 remainder of legs and apex of second and all of third abdominal segments, fer- 

 ruginous ; wings large, hyaline, nervures and stigma brown; head transverse, 

 pronotum broad, with parapsidal grooves indicated anteriorly ; metathorax smooth 

 with faint lateral carinae ; abdomen depressed, gradually widening to the apex 

 of segment 3. petiole straight, indistinctly grooved, slender at base, tubercles 

 prominent in middle. 



One specimen from Colorado (coll. Davis). 



^lesoleptus terpens n. sp. 



9 % . — 7-8 mm. Black, strongly pilose, clypeus, mouth-parts and tegulae yel- 

 lowish white: coxse, hind tarsi and apex of hind tibiiB, dusky to black; remain- 

 der of legs ferruginous; abdomen black, except segments 2-4, which are dull 

 rufous; wings large, hyaline, nervures and stigma brown, paler at base; trans- 

 verse median and basal nervures interstitial ; thorax broad, no parapsidal grooves; 

 metathorax with carina beneath spiracles; abdomen moderately broad, truncate 

 and subcompressed in J at apex ; petiole slender at base, considerably broadened 

 back of the tuberculate spiracles. 



Two specimens from Washington and Colorado (coll. Amer. Ent. 

 Soc. and Davis). 



JVIesoleptus scrupulosus u. sp. 



% — 7 mm. Black, with abdomen rufous, legs ferruginous, and clypeus, mouth- 

 parts, tegulse and spot in front, lemon-yellow; antennae dark reddish brown; 

 wings hyaline, iridescent, nervures and stigma brown, paler at base, stigma thick ; 

 parapsidal grooves indicated anteriorly ; faint longitudinal carinse on metathorax ; 

 abdomen elongate, somewhat arched, petiole slender, gradually widening, spira- 

 cles tuberculate; the whole body polished, shining and finely pilose. 



Two specimens from Nevada and Washington. 



Mesoleptus rnfigaKter Pro v. (Tryphon), Add. Faun. Hym. 104. 



9. — 5 ixfm. Black, with legs, scutellum and abdomen rufous, three apical 

 segments of abdomen fuscous; clypeus, mouth-parts, tegulae. spot in front and 

 line beneath, yellow; antennse brownish red; wings subhyaline, nervures and 

 stigma brown, submedian cell longer than median on externo-median nervure ; 

 abdomen short, rather broad, truncate and compressed toward the apex, petiole 

 with a slight median groove and gradually broadened toward the apex; head 

 opaque, thorax slightly polished : parapsidal grooves wanting; carinse indistinct 

 on metanotum ; abdomen smooth, polished. 



Two specimens from Georgia and one from Canada, 



