292 



E. T. CRESSON. 



facetus, Cresson, n. sp.,'^ . 

 utilis, Cresson, n. sp., % . 

 ? hilaris, <S'«y. — 

 laevigatus, Cresson, 9 • 

 rubicunduS; Cresson, % ^. 

 soror, Cresson, 9 . 

 residuus, Sai/, 9 . 



"VV. Va. I annulipes, Cresson, 9 . E. M. & W. S- 



Mass., Ct. pusillus. Cresson, 9 . Del. 



Ind. I tumidifrons. Cresson, n. sp., 9- His. 



Col. Tor. I quadriceps, Cresson,ii. sp. % 9 • Can., Ct. 



Ills. 

 Del. 



Mass., Ct. 



helvus. Cresson, n. sp., 9 • E. M. & W. S. 

 helvolus, Cresson, n. sp., 9 • Ct., Pa. 

 vincibilis, Cresson, n. sp., 9- His. 



NOTES AND DESCRIPTIONS. 



Ichneumon viola. — Mr. Walsh {Proc, &c., v, p. 210) considers maurus and 

 Orpheus identical with this species. They are certainly closely allied to each 

 other, but their general appearance and style of sculpture are so different, that 

 it would be quite as proper to consider these three species identical with mala- 

 cus Say, as to consider maurus and Orpheus identical with viola. Maurus is an 

 opaque black soecies, with the head narrowed beneath, the wings dark purple, 

 the metatliorax coarsely sculptured and opaque, the elevated lines sharp, and 

 the central area subquadrate. Orpheus has the body shining black, with a blu- 

 ish tinge, especially on the abdomen, the head broad and not narrowed beneath, 

 by reason of the more convex cheeks, the wings much clearer than in maurus 

 or viola, the metathorax not roughly sculptured, but shining, with the elevated 

 lines flattened and polished, and the central area quadrate. Viola is more shin- 

 ing than Orpheus having also a bluish tinge on the abdomen, the wings fuscous 

 or black, with a very brilliant purjjle or violet reflection, the metathorax simi- 

 larly sculptured to that of Orpheus, exceiit that the central area is always (in 

 nine specimens) small and somewhat conical, and often indistinctly defined. 

 The length of this species varies from 5i to Si lines. 



I. galenus. — % . Long, slender, black,' »paque ; antennpe long, slender, with a 

 broad yellow annulus about, the middle; mesothorax very densely aud finely 

 punctured, the punctures indistinct; scutellum convex and densely punctured, 

 as well as the metathorax, which has the elevated lines sharply defined, and 

 the central area rather large and quadrate; wings uniformly fusco-hyaline, 

 with a purplish gloss ; tips of the anterior femora and their tibiae within, palish : 

 abdomen long, slender, ojaaque, except towards the tip, which is a little shining; 

 basal segment bilineated, as usual, the basal fovesB of the second segment deep, 

 transverse and somewhat oblique. Length SJ lines. 



I£ab. — West Virginia, (Ridings); Illinois, (Dr. Lewis). Throe % specimens. 

 This and torvinus may be the males of some species already doscribod, but at 

 present it is impossible to determine to what species they belong. 



I. torvinus. — %. Long, slender, deep black, shining; head large, not narrow- 

 ed beneatli ; anterior orbits — narrow above and broad beneath the aniennis — a 

 short line on the lower posterior orbits and a S25ot on each side of the clypeus, 

 obscure whitish ; antenniB long, rather slender, with a narrow white annulus 

 about the middle; mesothorax densely and finely, but distinctly punctured; a 

 spot on the tegulaj anteriorly and another in front of each anterior wing, ob- 

 scure whitish; scutellum convex, polished, sparsely punctured; metathorax 

 conflucutly punctured, shining, the elevated lines well defined and the central 



