AMERICAN HYMENOPTERA. 375 



larly longitudinally striated; large, broad, rounded at the apex. Base of 2nd 

 ventral segment broadly, gradually rounded. Sides of scutellum projecting 

 above. Hind tibiae serrate ; there are at least 9 stout teetb, dark testaceous in 

 color. The space between the ocelli is depressed, Lower edge of occiput mar- 

 gined, but not sharply. The upper part of the mesopleurse before the apical 

 depression projects into a longish tooth or tubercle. The cheeks below project 

 into a distinct, sharply-pointed tooth, which is longer than it is wide at the base. 

 Apices of abdominal segments depressed, covered with golden pile. The anal 

 cellule in hind wings ends long before the origin of the cubital nervure. 



Except on the sides behind the spine, where it is thickly covered with pale 

 golden pubescence, the metanotum is almost bare, and is shining; the central 

 keel bifurcates at the middle, forming an elongate area, roundly narrowed at the 

 base; it bears a stout irregular keel in the centre of the apical half; in the 

 centre of the apical 6lope is a large, somewhat pyriform area, the wide end of 

 which is above. 



Hab. — Mexico. 



Conies nearest to N. mexicanus Cress., which agrees with it in 

 having a tooth on the mesopleurse. This tooth is described by 

 Handlirsch in his Monograph (Sitzb. d. Kais. Akad. d. Wissen., 

 Wien, xcv, p. 303) as "short, moderately pointed"; in the present 

 species it is longish, longer than wide and bluntly rounded on the 

 outerside ; in mexicanus, in the ? , the 6th segment bears a large 

 yellow spot; the middle area of the metanotum is covered with 

 yellow hair, while in N. longispinis it is quite bare of pubescence, 

 only the sides at the base being pilose. 



TAN YOPRYJI NITS gen. nov. 

 Radial cellule long, lanceolate ; 3 cubital cellules, the 3d along 

 the radius about one-third longer than the 2nd which receives 

 both the recurrent nervures; the 1st transverse cubital nervure 

 roundly curved, except near the cubitus, where it emits a distinct 

 nervure on the inner side. Eyes very large, strongly converging 

 below, reaching to the base of the mandibles. Ocelli prominent, 

 placed in a triangle. Face short, wider than long, its apex reach- 

 ing to the middle of the eyes; clypeus twice longer than wide, its 

 apex transverse. Labrum projecting. Legs long, slender, all the 

 tarsi much longer than the tibiae; the basal two joints of the hinder 

 together as long as the tibia?; tibiae and tarsi sparsely spined ; the 

 middle tibise with 2 calcaria ; claws long, simple. First abdominal 

 segment broad at the base, becoming gradually wider towards the 

 apex ; the pygidium depressed, roundly incised at the apex. Sides 

 of median segment broadly rounded. Last joint of antennae normal, 



TRANS. AM. ENT. SOC. XXXI. OCTOBER, 1905. 



