204 THE CANADIAN ENTOMOLOGIST 



Sternum. Halteres pale. Legs, coxae and trochanters light yellow ; 

 femora light brown, becoming light yellow on the apical sixth and 

 with a conspicuous, dark-brown, subapical ring; tibiae dark brown; 

 tarsi broken. Wings, whitish or subhyaline; costal cell slightly 

 more yellowish; grey clouds as follows: At origin of Rs (largest), 

 at stigma, at tip of Sc, along cord, along outer end of cell 1st M2 

 and in the center of most of the cells. Venation, (see pi. III.; fig. 10); 

 Sc long, extending far beyond the origin of Rs, Sc2 at the tip of 

 Sci, Rs almost square at its origin and spurred (in the types), cell 

 R2 almost as far proximad as cell 1st M2 (as in F. stulta O.S.), cell 

 1st M2 long, longer than the veins issuing from it, basal deflection 

 of Cu.i at the fork of M. 



Abdomen, tergum dark brown; caudal margins of the 7th, 8th 

 and 9th segments more yellowish; sternum dull yellow. Hypo- 

 pygium (see figs. 8, 9 ; pi. IV.) ; 9th tergite short, its cephalic and cau- 

 dal margin convex, its caudal half provided with a number of long 

 hairs. Pleurae very long, cylindrical, the tips produced into a 

 slender lobe on the ventral side; two apical appendages, which are 

 very short and inconspicuous, being scarcely one-third as long as 

 the plura; dorsal appendage simple, short, slender and subchitini- 

 ized, not exceeding the ventral appendage; ventral appendage 

 double, its dorsal arm being small, triangular and with the caudal 

 or outer face bearing a chitinized tooth, its tip produced entad and 

 cephalad into a blunt lobe; the ventral arm is produced entad into 

 a small lobe, with the tip evenly rounded. Viewed from the side, 

 the pleura is broad, its ventral margin rounded at the base, at the 

 middle of its length produced into a spatulate fleshy lobe which is 

 directed caudad. The guard of the penis is long (extending about 

 to the extreme tip of the pleura), and slender, broad at the base, 

 narrowed toward the tip, the end little, if any, enlarged; the apex 

 is very slightly notched; viewed from the side, it is seen that the 

 extremx tip is bent ventrad; viewed from above, the guard seems 

 to be concave, its lateral margins being more strongly chitinized. 

 The second gonapophyses are rather long, dark brown, subrounded 

 or scarcely pointed at the apex; at their base they are about as 

 broad as the base of the penis guard; the lateral margin of the 

 apophyse is produced dorsad into an incurved, chitinized flap or 



