AMERICAN HYMENOPTERA. 199 



% . Black; body slender; antennge slightly compressed, tliird joint 

 liardly as long as fourth ; lower ocellus in a small basin ; nasus not 

 emarginate ; edge of nasus, labrum and spot at base of mandibles white ; 

 tegultie, two edges of anterior angle and apex of venter yellow-red ; 

 legs yellow-red, trochanters white; base of coxaj, base of femora and a 

 line beneath, extending nearly to tip, apex of posterior tibial and their 

 tarsi black ; inner apical tarsal spur blunt, inner claw tooth small and 

 widely separated from outer. Wings hyaline, stigma and costa pale 

 waxen color. 



Labrador. Two S . (Mr. Packard). 



10. N. subalbatus. 



Xcmafiis subfdhatiifi, Norton, Proc. Ent. Soe. Phil, iii, 1864, 7, 10, 9 • 

 Length 0.28. Br. wings 0.62 inch. 

 9 . Black ; body short and not very stout. Antennae two-thirds the 

 length of body, flattened, covered with a short hairy pile; third joint 

 longer than fourth; lower ocellus in a shallow basin; nasus slightly 

 eraarginate; its edges, labrum and base of mandibles white; tegul;«, 

 antcriin- angle, venter and legs (in part) white; base of cox?e, a band 

 on all the femora, apex of posterior tibi;\!, posterior tarsi and apical 

 joints of all the tarsi black. Wings hyaline, apex and base of costa 

 pale; second recurrent nervure coinciding with intersection of second 

 and third submarginal cells. 



Pennsylvania, (Coll. Am. Ent. Soc.) One 9 • 



11. N. corniger. 



NematiLs corniger, Norton, Bost. Proc. viii, 1861, 159, 7, % . 

 Black; mouth, tegulas, venter, bands on tergum and legs (in part) black. 

 % . Length 0.17. Br. wings 0.40 inch. 

 9 . Length 0.25. Br. wings 0.58 inch. 



9. Black; body short and stout; aiitennj\3 more than two-thirds 

 the length of body, slightly flattened and enlarged at joints, third joint 

 longer than fourth ; no distinct sutures about ocelli, the lower ocellus 

 in a shallow depression; a faint piceous line on outer orbits; nasus 

 slightly emarginate ; edge of nasus and below and base of mandibles 

 white ; tegulse, upper half of anterior angles, edges of tergum and ob- 

 solete bands at most of the joints and venter, except at tip, white ; legs 

 wholly yellow-red, with the tips of hinder femora and apical half of 

 their tibia? black; tarsi black, trochanters white; inner tooth of claw 

 blunt and widely separated from outer. Wings hyaline, nervures and 

 stigma piceous, costa at tip and base pale; submarginal nerve curved 

 at second cell, hardly angulate. second recurrent nervure received near 

 the intersection of second and third cells. 



