ICHNEUMONID.E. 99 



the face is much broader than in honestus, the antennise have a very distinct, 

 broad whitish annulus, beyond which the joints are reddish-brown, the scape 

 is white beneath; the mesothorax, prothorax except collar, and the scutellar 

 region, are black, the former tinged with obscure reddish; the areolet of the 

 anterior wings is wanting and the basal segment of abdomen is longer, more 

 slender and with the stigmatic tubercles prominent ; the apex of abdomen is 

 dusky (probably discolored) and subcompressed. Length 4i lines. 



Hub. — Connecticut. (Coll. Mr. E. Norton.) One specimen. A more handsome 

 species than honestus, to which it is closely allied. 



M. luteifrons. — %. Same form as /on^'icornis; pale honey-yellow, head broad, 

 black, the face, clypeus, mandibles and palpi yellow; clypeus with long hairs, 

 ocelli large and very prominent; antennae longei'than the body, slender through- 

 out, entirely luteous-yellow, except extreme tips which are dusky : collar, te- 

 guljB and a spot before, yellow, the lateral margins of themesotliorax are faintly 

 broadly yellow ; metathorax smooth, convex and pubescent; wings ample, hya- 

 line, beautifully iridescent, nervures and stigma pale yellow; areolet subtri- 

 angular, oblique, very slightly petiolated; legs slender, color of the body, the 

 two anterior pairs pale at base; abdomen long, slender, subclavate; first seg- 

 ment long, parallel, depressed, the stigmatic tubercles prominent and placed 

 before the middle. Length 34 lines. 



Hab.— Fort Resolution, Great Slave Lake, H. B. T. (Coll. Mr. E. Norton.) One 

 ■^ specimen. 



M. fucatus. — 9. Ferruginous or brown-fenuginous, jiolished ; subpubescent; 

 head transverse, prominent behind the eyes; mandibles mostly pale yellow, 

 the anterior orbits, and clypeus sometimes tinged with yellow; occiput, cheeks 

 and vertex sometimes more or less black; antennpe more than half the length 

 of the body, blackish, more or less ferruginous at tips, sometimes so at base, tho- 

 rax sometimes entirely black, except the mesothorax which is always ferrugi- 

 nous, generally only the sutures are black ; metathorax with sharply defined 

 elevated lines, the two central ones forming a more or less narrow channel 

 which is more or less transversely striated, sometimes interrupted in the middle 

 by a cross carina; in two specimens the metathora.x is black with the large en- 

 closed space on each side of the central channel ferruginous ; the pleura some- 

 times black, stained with ferruginous and vice versa; wings hyaline, faintly 

 yellowish, beautifully iridescent, areolet wanting; legs tolerably slender, pu- 

 bescent, sometimes entirely ferruginous with the tips of posterior tibise black, 

 and their tarsi yellow, sometimes more or less black, especially the posterior 

 pair; generally the four posterior coxse, the middle femora behind, the tips 

 of posterior femora, and of their tibise are black : the posterior tarsi are always 

 yellowish, dusky at tips ; abdomen depressed, strongly clavate, very slender at 

 base; first segment slightly dilated at tip, the stigmatic tubercles prominent 

 and placed at the middle, base sometimes blackish; the apical segments are 

 sometimes dusky. Length 4 — 4J lines. 



Hab. — Connecticut; West Virginia. Eight J specimens. The coloration of 

 the head, thorax and legs is quite variable. 



M. cultus. — % . Honey-yellow, subpubescent, shining; the face, except a stain 

 down the middle, clypeus, spot on each side of ocelli, a spot beneath each eye, 

 mandibles except tips, and the palpi, lemon-yellow ; antennae nearly as long as 

 the body, black, with a broad lemon-yellow annulus near the tips, the joints 



