V °k*"'] PROCEEDINGS OF THE NATIONAL MUSEUM. 389 



The antennas are porrect, gradual iy acuminated towards apex ; the 

 head and thorax shining, with some scattered punctures ; metatborax 

 areolated, spiracles long, linear, contracted at middle; abdomen highly 

 polished, the petiole somewhat conically produced above at the bend 

 just in front of the spiracles, gastrocceli distinct, transverse. Wings 

 snbhyaline; stigma aud parastigma black, veins brown. 



Habitat. — Wisconsin. 



Described from four male specimens. 



Eristicus basilaris sp. nov. 



Female. — Length, 12""". Head, thorax, and abdomen, except the two 

 basal segments, black, polished; the head and thorax show a few 

 scattered punctures; there is a small yellow spot at summit of eyes 

 and another one at the middle of the post-orbits; the clypeus and man- 

 dibles wholly black; the antennae are involuted at tips, black, the first 

 joint of flagellum about twice as long as thick, the following gradually 

 become shorter and shorter to the seventh, from thence they are trans- 

 verse shorter than wide ; scutellum and post-scutellum, yellow ; meta- 

 tborax areolated, spiracles linear about five times as long as wide ; 

 legs ferruginous, all coxa? and the first joint of anterior and middle 

 trochanters aud the posterior trochanters, black; abdomen highly pol- 

 ished, the petiole blackish basally, gastrocceli nearly obsolete, only in- 

 dicated by a transverse roughness in the polished surface ; ovipositor 

 very slightly exserted. Wings subhyaliue ; stigma and veins brown- 

 ish-yellow, the costal edge black. 



Habitat. — Wisconsin. 



Described from two specimens. 



Eristicus cinctus sp. nov. 



Female. — Length, 14 mm . Black, polished ; a line beneath tegulae and 

 the scutellum lemon-yellow ; legs and second abdominal segment flavo- 

 ferrugiuous; coxa? and first joint of trochanters, tips of posterior 

 femora, extreme tips of tibiae, aud first joint of maxillary palpi, black. 



The head aud thorax, although polished, show a distinct scattered 

 punctuation ; the metatborax is distinctly areolated, the surface of the 

 areas more or less rugulose, the spiracles very long and linear ; the 

 gastrocosli are long, slightly oblique, deep. Wings fusco-hyaline j 

 stigma yellowish, veins black. 



Habitat. — Wisconsin. 



Described from one specimen. 



Eristicus binotatus sp. nov. 



Male. — Length, about lG mm , the abdomen being incurved and an exact 

 measurement can not be made. Black ; lower orbits connected with 

 two oblique marks on face beneath the antennae, a spot on scape be- 

 neath, pupil on tegulse and a line beneath, the scutellum, a lateral spot 



