G. C. DAVIS. 297 



rufous, subclavate ; basal segment black except at apex ; antennse reddish brown ; 

 wings hyaline, humeral cross-uervure of hind wing broken at the middle. 



% .—Differs in having the entire face and also large triangular patches on lateral 

 anterior sternum, yellow; three apical segments of the abdomen are black or 

 blackish, and posterior tibise and tarsi are nearly uniform reddish brown. 



Two specimens from Agricultural College, JNIichigan (types, coll. 

 College and Davis). 



Iflesoleiiis fideliN n. sp. 



9. — 6 mm. Head and thorax black, with clypeus, mouth-parts and tegulte, 

 yellowish; abdomen rufous, piceous beyond fourth segment; legs rufous, with 

 coxse and basal trochanters black; posterior femora and tibise at apex, piceous; 

 antennse rufous, piceous at liase ; wings hyaline, nervures and stigma pale brown. 



% . -What is perhaps the male of this species differs in having the face, scape 

 beneath, triangular spot on lateral margins of mesonotum. four anterior coxfe 

 and apical segment of posterior trochanters, yellow ; basal segment of abdomen 

 black; nervures of wings darker than in 9 . 



Two specimens from New Hampshire (types, coll. Amer. Ent. Soc. 

 and Davis). 



9Iesoleiu$« coiisors^ u. sp. 



9 . — 6 mm. Black ; abdomen rufous, with basal and apical segments somewhat 

 piceous; face, except median dot, scape beneath, mouth-parts, cheeks beneath, 

 tegulse, spot in front and four anterior coxfe beneath, yellow; legs clear rufous, 

 with coxa? and basal segment of trochanters black ; antenna? brownish red dusky 

 at base; wings hyaline, nervures and stigma brown, paler at base. This species 

 differs from the others also in that the metathorax and petiole are scabrous, and 

 the stigma is much broader and oval on inner side. 



One specimen from New Hampshire (type, coll. Am. Ent. Soc). 



Iflesoleiiis coiilractiis n. sp. 



9 . — 6 mm. Black, with abdomen beyond basal two-thirds of basal segment 

 dusky rufous: legs rufous, coxse and basal trochanters black: clypeus, mouth 

 parts, tegulse and spot on margins of mesonotum, yellow ; antennae slender, dark 

 brown : wings hyaline, iridescent, nervures and stigma small, brown ; stigina 

 triangularly elongate; second recurrent straight and uniting far back of cubital ; 

 humeral cross-nervure of hind wing slightly broken below the middle; head 

 oval, shagreened ; face triangular, narrowed below; clypeus transverse, broadly 

 arched, broadly impi-essed at apex and with a transverse row of long hairs ; tho- 

 rax shagreened ; mesonotum subtrilobed ; metathorax carinate, but lacking the 

 basal transverse carina ; abdomen subspatulate, shagreened, smooth above ; ovi- 

 positor slightly exserted ; basal segment subpetiolate at base, gradually widening 

 to apex, carinse with groove between present on base; legs slender. 



One specimen from Canada (type, coll. Amer. Ent. Soc). 



flexioleiii** idalioensis n. sp. 



9 . — ~ mm. Black, with segments 2 and .3 of abdomen rufous. 4 dusky rufous : 

 clypeus. mouth-parts, tegulse, spot before, four anterior cox?e and trochanters, 

 apical segment of posterior trochanters and tibial spurs, yellow; posterior tibia; 

 yellowish with the apex and the tarsi dusky, remainder of legs rufous; antennae 



TE.\NS. AM. ENT. SOC. XXIV. (38) OCTOBKR, 1897. 



