182 E. T. CRESSON. 



Microdus nigriceps, n. sp. 



%. — Pale sanguineous; head, antennae, spot behind postscutellum, pleura 

 beneath, four anterior coxae, all the trochanters, tips of four anterior tibiae. 

 posterior pair except middle, and all the tarsi, black; anterior margin of 

 elypeus and tips of mandibles reddish; mesothorax trilobate; metathorax 

 coarsely rugose; wings dark fuscous, a large irregular hyaline spot beneath 

 stigma, continued beneath areolet, which is minute, triangular and petiolated; 

 abdomen polished, first segment with a prominent lateral tubercle near base, 

 second segment with two deep basal foveas. Length .30 inch. 



One specimen. (Coll. G. W. Belfrage.) 



Microdus verticalis, n. sp. 



9. — Yellow-ferruginous, shining, head small, triangular; a large spot on 

 vertex covering ocelli and continued on occiput, a spot beneath base of each 

 antenna, apex of elypeus, most of mandibles and a spot on each side above 

 base of same, black; antennae as long as body, slender, entirely black; meso- 

 thorax strongly trilobed; metathorax rounded, rugose; wings dark fuscous, 

 with an irregular hyaline streak beneath stigma, areolet minute, petiolated ; 

 tips of posterior tibiae and four posterior tarsi fuscous; abdomen as in nigriceps ; 

 ovipositor as long as abdomen. Length .35 inch. 



One specimen. (Coll. Gr. W. Belfrage.) This may be the 9 of 

 nigricpps. 



tl ■< -rodus pygmseus, n. sp. 



9. — Small, black, shining; head, mesothorax, pleura and apex of abdo- 

 men polished; metathorax with two .approximate discal carinas; wings hya- 

 line, faintly dusky, nervures and stigma fuscous, areolet minute, petiolated ; 

 legs honey-yellow, coxae, posterior trochanters, tips of their tibiae and all the 

 tarsi blackish; posterior tibiae pale, with a dusky spot before base; abdomen 

 with two basal segments subopaque, densely and minutely sculptured, base of 

 second segment with two deep fovese and a central transverse, rather deeply 

 impressed, subarcuate line; ovipositor longer than abdomen. Length .15 inch. 



% . — More shining than 9 '< ^ e S s P a l er > &U tne coxae, trochanters and base of 

 femora black; abdomed entirely polished. 



Two specimens. (Belfrage.) 



Ischius lseviventris, n. sp. 



% . — Slender, black, shining; head subrotund ; mandibles and palpi brown ; 

 antennae nearly as long as body; wings hyaline, costal nerve black, nervures 

 and stigma pale; legs pale honey-yellow, coxae and most of trochanters black; 

 base of anterior femora, tips of posterior pair, tips of their tibiae and all the 

 tarsi dusky; abdomen piceous-black, polished ; venter pale. Length .15 inch. 

 One specimen. •(Belfrage.) A specimen from Dacota has the ab- 

 domen, except first segment, pale brown. 



Agathis exoratus, n. sp. 



% . — Yellow-ferruginous, smooth, shining ; head more or less varied with 

 black; mandibles, palpi, antenuaa^entirely, collar above, tegulae, scutellar re- 

 gion, postscutellum, metathorax exctept lateral spot, pleura beneath, four an- 

 terior coxae, all the trochanters, extreme tips of posterior femora, and their 



