Vol. XXV] ENTOMOLOGICAL NEWS 435 



and humeri yellow, the former with a black spot in front of the hal- 

 teres which connects with the black of the black metanotum; scutellum 

 bronze-brown, black at base and on the lateral corners (in one speci- 

 men concolorous with the dorsum). 



Dorsum of the abdomen greenish-black; more or less of the sides of 

 the first and second segments and the venter yellow; hypopygium yel- 

 low, rather large, with conspicuous black outer, and equally large, yel- 

 low inner appendages (Fig. 3). 



Coxae and feet pale yellow, tips of the tarsi slightly darker; front 

 coxae with a few yellowish bristles on the anterior surface; in some 

 lights these bristles appear brown ; middle coxse with a few black hairs 

 on the front surface and one large black bristle on the outer surface; 

 hind coxae with one erect black bristle on the outer surface ; fore tib- 

 iae with a row of black bristles on top ; these bristles, which are hardly 

 as long as the diameter of the tibia, do not reach the base or tip; fore 

 metatarsi hardly one-half as long as their tibiae ; hind femora with a 

 black bristle on the outside near the tip ; hind tarsi hardly as long as 

 their tibiae, with the first joint a little shorter than the second. 



Tegulae, their cilia and the halteres yellow. 



Wings grayish, hyaline, narrowed at base, the anal angle being obso- 

 lete ; last section of the fourth vein nearly straight, approaching the 

 third vein towards the tip ; posterior cross-vein about two-and-one- 

 half tim.es its length from the wing margin measured on the fifth vein; 

 veins brown. 



9 . One specimen from Ithaca, New York, seems to be the female 

 of this species, hut is in rather poor condition. The color is about the 

 same as in the male except that the dorsum of the thorax is black 

 where it is metallic in the male, but it seems to be a little greasy, and 

 I take that to be the reason for the difference ; it also has the row of 

 small bristles on the fore tibiae. The ovipositor is short and blunt, 

 shining, and of a reddish-yellow color. 



Described from two males, one taken by me on the trunk of 

 a tree at Elma, Erie County, New York, on August 27 ; the 

 other in the Cornell University collection, taken at Ithaca, 

 New York, July 9. The female from Ithaca, New York, July 8. 



This species runs to tibialis in the key of males in my paper 

 on this genus, but in this species the hypopygium is large with 

 the outer appendages black, while in tibialis the hypopygium 

 is small with small yellow appendages. 



While working up the genus Nenrigona last year I rejected 

 this species after describing it, as the flattened space in front 

 of the scutellum is not as conspicuous as in most of the other 

 species; the legs are somewhat stouter, and the first joint of 



