202 E. T. CRESSON. 



Ichneumones pneustici. 

 With the very limited amount of material before me belonging to 

 this division, I have thought it best for the present to refer the species 

 so far known to me to 



PII.COGENES, Wesm.' 



Black species 1. 



Black and ferruginous species, (the head and thorax being black). 

 Abdomen black at apex. 



Antennae with pale annulus 2 — 5. 



Antennae without pale annulus 6. 



Abdomen ferruginous, first segment only black 7. 



Abdomen entirely ferruginous 8. 



Ferruginous species. 



Head and apex of abdomen black 9. 



Head ferruginous. 



Abdomen black at apex 10 — 12. 



Abdomen entirely ferruginous. 



Antennae with pale annulus 13 — 14. 



Antennae without pale annulus 15 — 16. 



1. ater, n. sp. 



9. — Deep black, shining; head large, transversely subquadrate, cheeks 

 swollen, punctured; face short, transversely sculptured; clypeus sliort, broad, 

 anterior margin broadly rounded; mandibles narrowed to tip whicli has two 

 subequal teeth; antennae short, with whitish annulus on flagellum; thorax 

 finely, not closely punctured; scutellum large, flattened, broadly rounded 

 behind; metathorax coarsely and confluently punctured, with well-defined 

 elevated lines, posterior face oblique, longitudinally sulcate, transversely 

 sculptured; wings narrow, hyaline, areolet five-angular; legs slender, four 

 anterior knees, tibiae and tarsi dull testaceous, coxae simple; abdomen long, 

 narrow, subfusiform, sparsely punctured, polished ; postpetiole smooth, nar- 

 row; base of second segment longitudinally aciculated and with a broad 

 rather shallow depression, deeper at sides. Length .10 inch. 



ZTai.— Missouri. (C. V. Riley). 



2. hariolus. 



Ichneumon Jmriolus, Cress. Trans. Am. Ent. Soc. i, p. 305, 9 • 

 Hah. — N. H., Mass. Black, shining; head not unusually large, 

 cheeks swollen; broad anterior orbits, mandibles and sometimes the 

 cheeks yellowish-ferruginous; clypeus transversely depressed before 

 anterior margin which is bi'oadly rounded; antennae rather long and 

 slender, brown at base, black at tips, a whitish annulus on flagellum ; 

 thorax finely and closely punctured ; scutellum flattened, sparsely punc- 

 tured ; metathorax coarsely sculptured, with well-defined elevated lines, 

 posterior lace b.oadly excavated and transversely wrinkled; tegulse 

 whitish; wings subhyaline; legs ferruginous, subrobust, posterior 



