ichneumonid.Et 295 



antennre long;, slender, brownish beneath, with a narrow yellowish annulns be- 

 yond the middle, sometimes subobsolete: a short, narrow line before eacli an- 

 terior wing and another beneath, the scutelluni, and sometimes a line on the 

 post-scutellum, white; metathorax subrugose, with the elevated lines sharply 

 defined, the central area transversely subrotund ; wings hyaline, slightly tinged 

 with fnscous at tip; tips of the four anterior femora, their tibise more or less, 

 and the basal half of the posterior tibise white or whitish; abdomen slender, 

 subcylindric, shining at tip. Length 6 — 7 lines. 



Hab.— Mass., Conn., N. Y., D. C, III. Six ? , three % specimens. The J has 

 much the form oi subryaneu.% but is readily distinguished from that species by 

 the striped tibise. The % specimens may not belong to this species, although 

 they closely resemble the 9 in the markings. 



I. ultus. — %. Black, opaque; face, clypeus and palpi, in jtart, yellowish- 

 white; antennae long, slender, subserrato, the scajse whitish beneath; tegulee, 

 a sutural line in front, and a short line beneath each anterior wing, scutelluni 

 and post-sciilellum, white or yellowish white; metathorax confluently punc- 

 tured, the elevated lines sharply defined, the central area moderate, quadrate, 

 its posterior margin, and sometimes a spot on anterior margin, whitish ; wings 

 hyaline, sometimes with a slight yellowish tinge; all the coxae white, except 

 the posterior pair at base beneath; tips of the four anterior femora and a stripe 

 within, their tibise and tarsi entirely, and the posterior tibise, except the apical 

 third, also white; posterior femora black, theii- tarsi black in one specimen and 

 white in another; abdomen densely j^unctured, the first segment suddenly di- 

 lated at tip. Length 7i lines. 



Hub. — Connecticut, (Coll. Mr. Korton) ; "West Virginia, (Ridings). One 'J, spe- 

 cimen. The almost entirely white coxse will distinguish this species from au- 

 da.v and Brontcus, to which it is closely allied. 



I. rogalis. — % . Black, 02)aque ; antennse long, moderately slender, subserrate ; 

 sides of the face, a transverse lunate mark on the clyiJeus, (sometimes the face 

 and clypeus entirely,) spot on scape of antennae beneath, tegulse, a line before 

 and a short one beneath each anterior wing, scutellum and post-scutellum, a 

 spot on the four anterior coxse beneath, a line on the posterior pair exteriorly, 

 as well as its tip beneath, tips of the four anterior femora or a line within, the 

 four anterior tibise and tarsi, and the basal halt of the posterior tibise, all white 

 or yellowish-white; sometimes the two <'r three basal joints of the posterior 

 tarsi are yellowish, and a single specimen has the posterior tibise black, except 

 a short exterior white line; wings subhyaline, more or less tinged with fuscous; 

 metathorax with sharply defined elevated lines and a rather large, quadrate 

 centi-al area ; abdomen elongate, depressed ; first segment rather broadly dilated 

 at tip, and strongly bicarinate. Length 6 — 8i lines. 



Hub. — Connecticut, New York, (Coll. Mr. Norton;; West Virginia, (Ridings). 

 Fifteen %, specimens. Easily distinguished from its allies by the markings of 

 the face. 



I. mellipes. — %. Long, slender, dull black, the abdomen with a faint pur- 

 plish tinge ; antennce long, black, the basal joint yellow beneath; narrow ante- 

 rior orbits, face, clypeus, mandibles and palpi, and sometimes a spot on the 

 cheeks beneath the eyes, bright yellow; thorax shining; tegulse, a short sutu- 

 ral line before each anterior wing, a short, narrow line beneatli, and the scutel- 

 lum, bright yellow; metathorax subrugose, slightly shining, the elevated lines 



