388 DESCRIPTIONS OF ICHNEUMONID.E ASHMEAD. 



Eristicus minutus sp. nov. 



Female. — Length, S mm . Head and thorax dark ferruginous, opaque, 

 finely puuetulate, two spots on the mesonotum anteriorly and the scu- 

 tellum and post-scutelluia, yellow ; antennae short involuted, the three 

 or four basal joints of llagellum about twice as long as thick, a little 

 narrowed basally, the joints beyond fourth or fifth, transverse; scutel- 

 lum flattened, truncate behind ; metathorax areolated, the posterior 

 face is centrally hollowed, side areas black, the spiracles liuear, about 

 two aud a half times as long as wide; legs ferruginous, all the femora 

 somewhat swollen, the posterior coxae with a large yellowish spot above 

 basally ; abdomen highly polished, ferruginous, the four terminal seg- 

 ments black, gastrocoeli shallow, almost obliterated, ovipositor slightly 

 exserted. 



Wings fusco-hyaline ; stigma yellowish, areolet pentagonal, the upper 

 side being half the length of the lower outer side, the cubital nervure 

 geniculated at about the middle but without a stump of a vein. 



Habitat. — Wisconsin. 



Described from one female specimen. 



Eristicus erythrogaster sp. nov. 



Female. — Length, 13 mm . Head and thorax black, polished ; head with 

 a few punctures, a spot on orbits below antenna and two above at 

 summit of eyes, yellow ; clypeus and mandibles, except apex, reddish- 

 yellow; antennae black, involuted, first joint of flagellnm about two 

 and a half times as long as thick, the three or four following joints 

 hardly twice as long as thick, the joints beyond these shorter; tegulae 

 ferruginous ; upper margin of the prothorax interrupted anteriorly, two 

 moderately large spots on mesopleura, spot on disk of mesouotum, scu- 

 tellum, post-scutelluin, a quadrate spot on disk of metathorax, and a 

 spot on uietapleura, lemon-yellow; metathorax areolated, truncate pos- 

 teriorly, the face not hollowed, the spiracles as in previous species; 

 legs ferruginous, all coxa? and first joint of all trochanters, black. 

 Abdomen ferruginous, smooth, highly polished, gastrocceli obsolete, or 

 only indicated by a slight transverse scar in the highly polished surface. 

 Wings hyaline, with a very faint fuscous tinge; stigma and veins pice- 

 ous, the stigma paler along the inner margin. 



Habitat. — Wisconsin. 



Described from one specimen. 



Eristicus apicalis sp. nov. 



Male. — Length, 13 mm . Head, antennae, thorax, all coxae and four 

 termiual abdominal segments, black; a spot on scape beneath, face, 

 clypeus aud mandibles, except tips, a small dot at summit of eyes and 

 a spot at middle of post-orbits, tegulae, costae, scutellum and post-scu- 

 tellum, yellow ; legs and three basal abdominal segments, ferruginous. 



