AMERICAN HYMENOPTERA. 199 



21. buccatus, Cress. Proc. Cal. Acad. Nat. Sci. 1877. 



Ilab. — Vaucouver's Lsland. Rather small, robust, uniformly fulvo- 

 ferrug;inous ; antennae black, fulvous at base; wings blackish-violace- 

 ous ; head quadrate, cheeks swollen ; postpetiole not elevated. Length 

 9 .()(> inch. 



22. elegans, Cress. Trans. Am. Ent. Soc. ii, p. 94, 9 . 



Hub. — Maine. Honey-yellow, with a fine golden sericeous pile 

 especially on legs and abdomen ; the face, tarsi and tip of abdomen 

 paler; base and tips of antenna tinged with fuscous; wings yel- 

 lowish, with a brilliant golden gloss, a triangular mark at tip of 

 externo-medial cell and a large irregular cloud at tip of anterior 

 wing, black ; stigma yellow ; abdomen darker colored at base. Length 

 9 .75 inch. 



Ichneumonides platyuri. 



Scutellura carinate laterally PLATYLABU8. 



Scutellum not cariuate laterally EURYLABUS. 



PI.ATYIiABUS, Wesm. 



Body steel-blue 1. clarus. 



Body black and ferruginous. 



Abdomen black, second segment only ferruginous 2. SCiitellatus. 



Abdomen entirely ferruginous or black at extreme base and apex. 



Antennae without pale annulus; head and thorax black 3. COllSOrs. 



Antennfe with pale annulus. 

 Metathorax black. 



Basal joints of fiagellum ferruginous; soutcllum with white spot at 



tip 4. canadensis. 



Basal joints of flagellura black; scutellura white 5. uioutauus. 



Metathorax ferruginous. 

 Scutellum white. 



Abdomen ferruginous, black at tip 6. signatus. 



Abdomen entirely ferruginous 7. ornatns. 



Scutellum ferruginous or black. 



Abdomen ferruginous, black at tip , 8. thoracicns. 



Abdomen entirely ferruginous 9. 4-cariuatus. 



Body entirely ferruginous. 



Antennae witiiout pale annulus 10. calirornicus. 



Antennae with pale annulus 11. liueolatus. 



1. clarus. 



Ichneumon clarus, Cress. Trans. Am. Ent. Soc. i, p. 297, 9 . 

 Ilab. — N. H., Mass. A beautiful steel-blue species, with clear 

 wings, white annulus on antennae, and generally a white spot on scu- 

 tellum ; sometimes the thorax is tinged with green. The % is less 

 shining, narrower, with face, clypeus and four anterior coxae beneath 

 white; flagellum entirely black. Length % 9 .40 — .55 inch. 



