266 PROCEEDINGS OF THE ACADEMY OF [May, 



Legs blackish, some pruinosity on coxse, trochanters, and femora. 



Wings uncolored, the venation described on p. 238. Stigma dark 

 brown, surmounting 2+ to 4 cells, its proximal side very oblique, 

 so that one or more postnodals are placed between it and the costa, 

 and at least twice as long as the distal side. The relative lengths of 

 the four sides of the stigma, beginning with the longest, are : posterior, 

 proximal, anterior, distal. No brace-vein, i.e., no thickened cross- 

 vein in prolongation caudad of the proximal side. 



Dorsum of abdominal segments 1 and 2 dark metallic green, of 

 3-10 black, except that in the middle of 3-5 or 6 the black is replaced 

 by ill-defined dark brown. Sides of 1 and 2, a transverse basal ring 

 on 3, sides inferiorly of 3-7, pale brown or luteous. The dorsal black 

 of 3-6 is continued ventrad at the posterior ends of these segments, 

 forming a transverse apical band on each. A transverse basal 

 yellow ring on 4-7. Intersegmental articulations of 7-10 luteous, 

 otherwise 8-10 are wholly black, 9 being also pruinose on the dorsum. 

 Pruinose traces are also visible on the intersegmental articulation of 

 1-2 and on the sides and sternites of most of the segments. Hind 

 margin of 10 entire. 



Superior appendages longer than 10, a little shorter than 9, black, 

 partly pruinose. Viewed in profile, the axis of each appendage is 

 parallel to that of the abdomen, but the superior margin is strongly 

 declined in the proximal fourth, less so in the remaining three-fourths ; 

 the inferior margin in the distal three-fourths of the appendage is 

 produced ventrad into a strongly convex lamella which terminates 

 at the blunt apex of the appendage ; this lamella reaches its maximum 

 at one-half to two-thirds of the appendage-length. On the dorsal 

 surface of the appendage at the extreme base is a short transverse 

 ridge, which in profile view appears as a tooth. In dorsal view, each 

 superior appendage shows its superior margin as almost straight and 

 decreasing in width throughout the proximal three-fourths, while the 

 distal fourth is strongly curved toward its fellow of the opposite side; 

 the ventral lamella is inclined inward and downward (mesad and 

 ventrad) , the short transverse basal ridge is at the mesal margin. 



Inferior appendages about seven-eighths as long as the superiors, 

 black. Each one, in profile view, conical, tapering more rapidly on 

 the superior margin beyond two-fifths its length, so that at this point 

 this margin shows an angle; distal third curved strongly upward 

 (dorsad) and terminating in a slender very acute apex. In ventral 

 view, each appendage is applied against its fellow for the proximal 

 three-fifths of its length, beyond which it is continued along the outer 



