AMERICAN HYMENOPTERA. 201 



14. Nematus violaceipennis, n. sp. 



Black; orbits piceous ; mouth, tegulse, anterior angle and venter reddish- 

 wliite; legs beneath ])iceous ; wings semi-obscure, with a violaceous tinge. 

 Length 0.32. Br. wings 0.64 inch. 



9 . Black; body long and slender; antennae about half the length 

 of body, slightly flattened and enlarged at tip of joints, third joint not 

 so long as fourth ; lower ocellus in a heart-shaped depression; nasus 

 ungulate, emarginate ; outer orbits indistinctly piceous, paler toward 

 the cheeks; an arc-shaped spot below the antennaj, nasus, labrum and 

 base of mandibles, anterior angle, edges of abdomen, and all but the two 

 apical segments of venter whitish ; legs black above, knees and ante- 

 rior tibiae before piceous; inner tooth of claws large and near the tip. 

 Wings subviolaceous, nervures dark, stigma somewhat bent above. 



% . Above, the male is wholly black, nearly as long as female, slen- 

 der; third joint of antennae thicker than fourth ; labrum, anterior ti- 

 biae and tarsi indistinctly piceous. Wings slender toward tip. 



Farmington, Conn., April 24. Massachusetts, (Coll. Am. Eat. Soc.) 

 Three 9 i three % . 



15. N. nigritus. 



Ne.maius nigritus, Norton, Bost. Proc. viii. 1861, 159, 0, % . 

 Black; outer orbits and mouth, tegulse, apex of abdomen and legs in part, 

 I>ale. Length 0.21. Br. wings 0.48 inch. 



% . Black; body slender; antennas two-thirds the length of body, 

 slightly flattened and enlarged at joints, third joint shorter than fourth;, 

 nasus hardly emarginate ; an outer orbital line as high as suture, edge 

 of nasus and beneath pale piceous; tegulae and apex of abdomen and 

 several apical segments of vertex yellowish ; trochanters, apical half of 

 femora, tibias, except tips of hinder pair, and base of tarsi reddish- 

 white, remainder black ; inner tooth of claw very short, blunt and dis- 

 tinct from outer tooth. Wings hyaline, nervures piceous, middle of 

 stigma and base of costa paler; second submarginal cell with one angle 

 below, the second recurrent nervure coinciding with second dividing 

 nervure. 



Connecticut. Two % . This may be the male of A^. suhalbatus. 



l(i. N. ventralis. 



Nematus ventralis, Say, Long's Second Exp. ii. 1824, 315, % 9- 

 Norton, Bost. Proc. viii, 158. 5. 

 Black; mouth, tegulse, anterior angle and venter j)ale; femora black banded; 

 wings hyaline. 



Length % , 0.25. Br. wings 0.54 inch. 

 Length 9 , 0.30. Br. wings 0.68 inch. 



9 . Black ; body short and stout ; antennae about half the length of 

 body, rather stout, third and fourth joints equal length, third thicker 



TUANS. AMER. ENT. SOC. (26) AUGUST, 1867. 



