296 AMERICAN HYMENOPTERA. 



Scutellums black or dusky rufous; apical margins of abdominal segments rarely 

 white. 

 Pleurse rufous ; posterior tibife black, white at base and with inner white 

 stripe; abdominal segments margined with white. 



puritaiiicus n. sp. 

 Pleura; black. 

 Coxge rufous. 



Posterior tibige white and black pertiiiax n. sp. 



Posterior tibige rufous, dusky at apex coiifornius n. sp. 



Coxje black articularis n. sp. 



Iflesoleius scapularis Cress. {Mesoleptns), Trans. Am. Eut. Soc. ii. 98. 



% 9 . — 8 mm. Eufous, with head black and thorax varying from entirely ru- 

 fous to piceous or part black ; sternum and pleurge usually black or piceous; ab- 

 domen sometimes black at base ; face, mouth-parts, scape beneath, cheeks beneath, 

 tegulse, spot in front, broad triangular line on lateral margins of mesonoturn 

 sometimes recurving medially, scutellums, more or less of sternum and pectus in 

 % , trochanters and four anterior coxfe, lemon-yellow ; remainder of legs rufous, 

 with tibiae at apex and tarsi of hind legs often dusky ; antennse reddish brown ; 

 wings hyaline, nervures and stigma brown ; areolet sometimes present, usually 

 wanting; stigma lauceolate. 



Twenty-four specimens from Montana, Southern California, Wash- 

 ington and Connecticut (type, coll. Amer. Ent. Soc). 



Mesoleiiis convergens n. sj). 



9 . — 8 mm. Head and thorax black, with scape beneath, lower portion of an- 

 terior orbits, a V-shaped line extending fiom antennse to clypeus ; clypeus, mouth- 

 parts, tegula?, point in front, line beneath, lateral margins of mesonotum, scutel- 

 lums, trochanters and four anterior coxfe, lemon-yellow; abdomen rufous, basal 

 segment black, rufous at apex ; legs rufous, posterior coxge black ; antennffi brown- 

 ish yellow; wings subhyaline. nervures and stigma brown; stigma lanceolate; 

 humeral cross-nervure of hind wing broken at the middle. 



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

 and Davis). 



iVIesoleius uuperus n. sp. 



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

 before and tip of scutellum, yellow, trochanters and four anterior coxse yellow- 

 ish ; abdomen rufous on segments 2 and 3, remainder piceous to black ; legs ru- 

 fous with apex of posterior tibise and the tarsi, dusky ; antennse reddish brown ; 

 wings subhyaline, nervures and stigma brown ; humeral cross-nervure broken 

 much below the middle; abdomen truncate at apex, short. 



One $ from New Hampshire (type, coll. Amer. Ent. Soc). 



3Ie!<«oleius visoris n. sp. 



9 % . — 7-8 mm. Head and thorax black ; 9 with scape beneath, face, except 

 two black inter-orbital lines, mouth-parts, tegulfe, spot in front, line beneath, 

 large cuneiform line on lateral margins of mesonotum, scutellums, trochanters, 

 four anterior coxte and venter, lemon-yellow; remainder of legs rufous; poste- 

 rior tarsi and apex of tibige black, also a dusky annulus near base of hind tibiae 

 separated from the apical portion by an obscure yellowish auuulus; abdomen 



