i;6 



NEW YORK STATE MUSEUM 



yellowish with posterior margins of the segments dark brown and 

 laterally, about the middle of each segment a short, dark brown, 

 curved line suggesting the posterior border of a subsegment. Geni- 

 talia orange-yellow. Wings hyaline, costa light brown, subcosta 

 uniting with the margin at the basal third, the third vein curved 

 distally, well beyond the apex, the fifth at the distal fourth, its branch 

 at the basal third; hal teres yellowish transparent, tinged with orange 

 basally. Legs pale straw-yellow; femora and tibiae slightly fuscous 

 distally; tarsi light brownish apically; claws slender, strongly curved 

 at the basal third, the anterior unidentate. Genitalia; basal clasp 



Fig. 73 Karschomyia 

 viburni, terminal anten- 

 nal segment of male (enlarged, 

 original) 



Fig. 74 Karscho- 

 myia viburni, last 

 abdominal segment (en- 

 larged, original) 



segment stout, at the internal angle, a thickly set group of 7 or 8 

 long, stout, slightly curved setae; terminal clasp segment stout, 

 expanding distally and curving to a broadly rounded excavated apex ; 

 at the basal third a curved, broad, chitinous process, with a rounded 

 extremity extends over the excavated internal face; dorsal plate 

 broad, practically divided, the lobes sub triangular ; ventral plate 

 apparently absent. Harpes exceedingly complex, consisting of a 

 broad, convolute basal portion slightly diverging distally from the 

 median line and apically a series of long, stout, strongly curved, 

 apparently fused teeth suggesting the segment of a hollow sphere; 



