AMERICAN HYMENOPTERA. 213 



black ; inner tooth of claw large and near to tip. ^Vings hyaline, stig- 

 ma and costa pale. 



Mass., Conn , Labr. Two % , one 9 . 



.34. N. crassus. 



Nematus crassus, Escholz., Entomog. 1822, 97, 6.5. 

 "Black: sides of the liead, lines on the thorax, seiitollum and jileura, chest- 

 nut; tibiffi pale. Length 4 lines. 



Body thick. Head black in the middle, of a nut-brown on the sides ; 

 parts of the mouth yellow. Antennse longer than the moiety of the 

 body, filiform, black; border of the corselet brown; two longitudinal 

 lines on the thorax, scutel and the greater part of the sides of the tho- 

 rax of a chestnut-brown; abdomen convex, shining black; wings lon- 

 ger than the body, wide, transparent, stigma and costa yellow, nervures 

 brown ; marginal cell simple, extending almost to the tip ; three dis- 

 coidal cells; legs yellow ; a long black spot under the anterior femora ; 

 posterior femora black, at the extremity yellow. 



Isle of Tnalaschka, Russ. Am." Not seen. 



25. Nematus placentas, n. sp. 



Black; thorax trilineate with black; most part of head, prothorax, sutures 

 of inetathorax, scutel, pleura, a spot on breast, edges of tergum and venter yel- 

 low-white. Length 0.28, Br. wings 0.68 inch. 



9 • Body stout. Antennae moderate, slender, final joint very slen- 

 der; head pale; a spot about ocelli, two longitudinal oval spots below 

 and back of head black; tegulae and prothorax, metathorax, (with 

 three black vittse on the lobes), scutel, sides and apex of tergum, ven- 

 ter, pleura varying from ochraceous to whitish, and pectus black, with 

 a large pale spot in its centre; coxaj, trochanters, the four anterior 

 legs, except a black line on the upper side of femora, ochraceous ; pos- 

 terior legs black, with both ends of femora and the basal half of tibia? 

 beneath pale. Wings hyaline, stignui pale in middle. 



S . The male differs in having the legs entirely pale below the 

 cox re. 



Vcir. Z . The mesothorax wholly black. (Canada.) 



Labrador, (A. S. Packard,) Canada. One 9 , two S . 



This seems allied to JSf. lateralis. 



30. N. inquilinus. 



Nematus iuquilinus, "Walsh, Proc. Ent. Soc Phil, vi, 1866, 260, 9 % . 



Length 9 0.22— .26, % 0.20 inch. Br. wing 9 0.24— 



.27, I 0.42 inch. 



" 9 • Shining honey-yellow. A quadrate spot enclosing the ocelli, 



not reaching antenna) nor touching orbit, and the tips of mandibles 



black. Clypcus emarginate in an arc of about 120*^. Labrum promi- 



