ICHNEUMONIDyE. 07 



Tlie 9 has a small black mark between and beneath the antennre, and the 

 ;i])ex of tlie abdomen is subcompressed. 



Hab. — Massachusetts, Connecticut. Seven %, one J, specimens. Closely 

 allied to elongatus. 



M. propinquus. — %. Same form as the preceding species; black, shining; 

 face. cly])eus, mandibles except tips, and the pal])!, yellow; a short median 

 black line beneath the antennje; antennae as long as the body, slender, fulvous, 

 blackish at base above, sometimes entirely dusky above, scape pale beneath; 

 thorax immaculate, except a small yellow spot before the tegulis ; metathorax 

 shining, with a subrugose, more or less deep, channel down the middle; tegnlse 

 lemon-yellow; wings hyaline, iridescent; areolet petiolated, triangular ; legs 

 fulvo-ferruginous, the four anterior coxge and all the trochanters lemon-yellow, 

 posterior tibiaj and tarsi more or less dusky ; abdomen same jbrm as in preced- 

 ing species, with the first segment similarly sculptured ; black, third and fourth 

 segments davo-fi-rruginous, sometimes these two segments have large, blackish, 

 lateral stains ; venter yellowish or fulvous, more or less varied with dusk}', the 

 apex black. Length 3i — 4 lines. 



Hab. — Mass., Del. Three % specimens. Distinguished from iwcqj^us, princi- 

 jially. by the color of the abdomen. 



M. assiduus. — %. Same form as the preceding; black, shining; anterior or- 

 bits beneath antennae, a U or V-shaped mark on the face, clypeus, sometimes a 

 spot ou the (dieeks beneath the eyes, mandibles except tips, and the palpi, le- 

 mon-yellow ; antenni« slender, scarcely as long as the body, dusky ferruginous, 

 scape yellow beneath ; mesothorax strongly trilobed, with a lateral yellow line 

 dilated anteriorly; metathorax subrugose, especially down the middle; tegulse 

 and a spot in front, lemon-yellow; wings hyaline, iridescent, areolet oblique, 

 small, petiolated; legs colored as in the preceding species; abdomen subpetio- 

 late, strongly clavate, subconvex above, fulvous or pale ferruginous, with the 

 basal and two apical segments more or less black; first segment deoressed, ru- 

 gulose, shorter and broader than in the three preceding species, the stigmatic 

 tubercles prominent; apical segments smooth and shining. Length 34 lines. 



Hab. — Massachusetts. Two % specimens. Easily recognized by the mark- 

 ings of the face. 



M. sedulus. — %. Same form as a.s.'iiduus, but more robust; Wack, shining, 

 finely and thinly pubescent; face densly clothed with a silvery pile ; clypeus, 

 mandibles except tips, and the palpi, yellow; antennae as long as the body, 

 slender fulvous, more or less dusky above, scape black above and yellow be- 

 neath ; tegulte and spot in front, lemon-yellow; metathorax shining, with tol- 

 erably well-defined elevated lines; M'ings hyaline, iridescent, areolet sub-trian- 

 gular, petiolated, somewhat oblique; legs slender, honey-yellow, four anterior 

 coxae, the posterior pair beneath, and all the trochanters lemon-yellow, tips of 

 posterior tibiae and their tarsi dusky; abdomen subpetiolate, strongly clavate, 

 convex, shining, fulvo-ferruginous, with the first and generally the two apical 

 segments black; first segment gradually dilated towards the tip, channeled 

 at base, the stigmatic tubercles very prominent, and placed about midway 

 between base and apex; remaining segments smooth and shining. Length 

 ;-!i lines. 

 Hab. — Massachusetts., New Jersey. Three % specimens. 



TRANS. AMEU. ENT. SOC. (13) JULY, 1868. 



