316 AMERICAN HYMENOPTERA. 



Three specimens, Canada and Grand Ledge, Mich., on th.e bank 

 of the Grand River, June '.idth (types, coll. Amer. Ent. Soc. and 

 Davis). 



Iflesoleptiis albifrons Cress., Trans. Amer. Ent. Soc. ii, 98. 



9. — 9 mm. Rufous, with the head, pro- aud mesouotnm, abdomen beyond 

 petiole and apical portion of posterior tibise dusky red to black ; face, mouth- 

 parts, cheeks beneath, scape beneath, broad annulus on tlagellum, scutellum, 

 tegulffi, spot in front, pectus, four anterior coxse beneath and trochanters, white ; 

 remainder of leg;s. except femora and hijid coxse which are honey-yellow, yel- 

 lowish white; antennse black beneath the white annulus, brownish red above: 

 wings fusco-hyaline, nervures and stigma brown; metathorax without carinse ; 

 abdomen smooth. 



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



9Ie.sole|>tiis deceiis Cress., Trans. Amer. Ent. Soc. ii, 101. 



9 % . — 7-10 mm. Black, with face, scape beneath, mouth-parts, cheeks be- 

 neath, scutellum, tegulse, spot in front, line beneath, line on lateral margin of 

 mesonotum, pectus, venter, four anterior coxse and trochanters, apical half of 

 hind trochanters and dorsal spots at the apical margin of the abdominal seg- 

 ments, often wanting on segments 1 and 2 and broadest on terminal segments, 

 white ; posterior legs with basal trochanters, apical portion of tibia; and the tarsi 

 dusky; remainder of legs ferruginous: antennge reddish bi'own, darker at base 

 above ; wings hyaline, nervures aud stigma pale brown ; body finely pilose, sub- 

 polished : mesonotum faintly trilobed anteriorly ; metanotum with carina beneath 

 spiracles : abdomen long, slender, petiole very narrow with post-petiole broad- 

 ened, spiracles prominent. 



Six females and three males from New Hampshire, C(jnnecticut, 

 Colorado aud Virginia (^type, coll. Amer. Ent. Soc). 



Ulesoleptiis zebratus n. sp. 



9 .—5 mm. Black, with clypeus, month-parts, cheeks beneath, face bordering 

 on clypeus and two lines extending to antennje, scutellum. tegulse, dot in front, 

 one beneath, broad triangular line on anterior margin of mesonotum, trochanters, 

 except basal part of posterior one, which is dusky, broad annulus on hind tibige, 

 hind tibial spurs and an even band on apical margin of abdominal segments 3-7, 

 pure ebony white; hind tarsi and a])ex of hind tibise, dark brown: remainder 

 of legs, sternum, pectus, meta- and most of mesopleura, honey-yellow; antennae 

 reddish brown, darker at base above ; wings hyaline, strongly iridescent, nervures 

 and stigma pale brown ; thorax broad, without parapsidal grooves; metatiiorax 

 faintly carinate ; abdomen smooth, polished, broad; petiole short, broad, gradu- 

 ally widening toward the apex, faintly grooved. 



% . — Differs in not being such a pure white except on the abdomen ; metathorax 

 entirely black; scutellum black with two lateral white stripes; sternum, pectus 

 and lower pleura white; and entire face and scape beneath, white. 



Two specimens from New York (types, coll. A. E. S. and Davis). 



Mesoleptus insidiowus Cress., Trans. Amer. Ent. Soc. ii. 98. 



% . -7 mm. — Black, with abdomen, except petiole, and hind legs beyond tro- 

 chanters, rufous; face, scape beneath, orbital lines each side, moutli-parts, cheeks, 



