OF NATURAL HISTORY. 685 



low, becoming greenish behind, segments with a broad blackish 

 band at base, the anterior bands broader : pleura with more of 

 yellow than black : feet yellow : coxae varied with honey-yellow : 

 posterior thighs, their tibiae at tip, and tarsi at tip, honey-yellow. 



Length less than half an inch. 



Resembles the preceding. 



ICHNEUMON. 



1. I. SUTURALIS. — Ferruginous J scutel yellow; .sutures black. 

 Inhabits North America. 



Body pale ferruginous : antennas black beyond the [227] mid- 

 dle ; trunk with black sutures : scutel more or less tinged with 

 yellow : wings tinged with ferruginous ; carpus yellowish ; ner- 

 vures blackish ; central cellule pentangular, the side on the radial 

 cellule rather smallest, basal and apical sides longest, not parallel : 

 metathorax with slightly elevated lines in the form of an H : 

 tergum with the apical sutures not black ; basal segment with 

 two slightly elevated longitudinal lines : tibiae, posterior pair 

 black at tip : venter, basal segment black ; sutures not black : 

 oviduct not longer than the breadth of the anal segment. 



Var. a. Front, scutel and basal joint of the tergum at tip, 

 yellow, 



Var. a. Sutures of the tergum not obviously black. 



Var. y. Somewhat polished. 



A common species, of which I obtained specimens in Mexico ; 

 it is also found in Pennsylvania, Indiana and Missouri. This 

 most resembles the ferrugato?- Swederus, (Trans. Stockholm Soc. 

 for 1787,) which I have not met with, unless this should prove 

 to be a variety of it, which is very doubtful and even improbable. 



2. I. MALACUS nob. Contrib. Macl. Lyceum i. p. 72.— To 

 " abdomen with an impressed line each side," ought to be added 

 beneath the edge ; this is a character, however, common to many 

 species. The tergum, in a particular light, has a slight tinge of 

 blue. [Ante, 1, 376.] 



3. I. MORULUS nob. (ibid. p. 73.)— Annulation of the antenna) 

 beginning with the seventh or eight joint and ending with the 

 fourteenth. The tibiae and tarsi are honey-yellow; and the ovi- 

 duct hardly extends beyond the tip of the abdomen. 



1835.1 



