a. c. DAVIS. 245 



HEL.ICTES Haliday— JrfJoxMs Foerster. 

 (Synopsis der Fam. und Gatt. der Ichneumonen, 1868.) 

 Helic'tes riificoriiiw n. sp. 



% . — .3.5 mm. Black, with antemife, mouth-parts, tegulge and legs, pale rufous; 

 abdomen piceous, paler on second segment ; wings hyaline, uervures and stigma 

 pale brown, the latter lanceolate, slender; areolet wanting, no cubital cross-vein ; 

 antennpe large, filiform, and as long as body; ba.sal segment of flagellum three or 

 more times as long as the second ; scape large, globular; body polished; meta- 

 thorax truncate behind, areolated with high carina, strongly tuberculate iu apical 

 enter corners; metathorax and hind coxpe granular; abdomen petiolate. not com- 

 pressed, the petiole is inflated on tiie disc near apex ; legs slender; tibiwe not con- 

 stricted at base. 



One specimen from Algonquin, IU. (Dr. Nason). Type, coll. 

 Davis. 



I»L,ErTISCUS Gravenhorst. 

 (Ichneumonologia Europsea, Tom. ii, 978. 1829.) 

 PleuriE black ; abdomen narrowly sessile. 



Stigma brown ; hind coxae yellow gracilis Pro v. 



Stigma yellow ; hind coxse partly or entirely black iiiger Prov. 



Pleurae rufous: face white; abdomen petiolate pleiiralis Prov. 



PlectisciiN gracilis Prov., Faune Eut. Can. ii, 382. 



9.-6 mm. Black, with clypeus, mouth-parts, scape beneath, tegulae and legs, 

 pale yellow; posterior tarsi and extremity of tibiae, dusky: wings hyaline, ner. 

 vures pale brown, stigma yellow; areolet subquadrate, subpetiolate ; legs and 

 antennae long and slender: abdomen depressed, narrowly sessile, the first seg- 

 ment slightly enlarged toward apex ; ovipositor a little longer than the abdomen, 

 black, straight. 



(Taken from Provancher's description.) 



Plectiscus iiij;er Prov., Faune Eut. Can. ii, 793. 



% 9.^4 mm. Black, polished, with clypeus, mandibles and tegulae, white; 

 antennae slender, brown at base ; legs pale yellow, tibiae and tarsi more or less 

 dusky: hind coxae black at base in 9, entirely black in %; third abdominal 

 segment more or less margined with red in % ; ovipositor longer than abdomen ; 

 wings hyaline, iridescent, stigma brownish yellow, areolet rhomboidal, sessile. 



(Taken from Provancher's description.) 



Plectisciis pleuralis Prov. {Meniscus). Faune Ent. Can. ii, 381. 



9 . — 6 mm. Black, with face, cheeks, mouth-parts, tegulae, four anterior coxae 

 and trochantei's, base of posterior tarsi, spot at base on each side of second ab- 

 dominal segment, median stripe from middle of segment two to apex of third 

 segment and venter, white; sternum and pleui-ae rufous; wings with a rhom- 

 boidal areolet, shortly petiolate, stigma reddish ; legs pale rufous, with posterior 

 tibiae black at extremity; abdomen linear, depressed, somewhat compressed at 

 apex; basal segment narrow, slender, graduitlly enlarged toward the extremity; 

 other segments oval, elongate; ovipositor about a fourth as long as abdomen. 



(Taken from Provancher's description.) 



Tryphon laticmctus Cress., from Mexico, also belongs to this genus. 



TRANS. AM. ENT. SOC. XXIV. SEPTEMBER. 1897. 



