176 NEW YORK STATE MUSEUM 
yellowish with posterior margins of the segments dark brown and 
jaterally, 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; halteres 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 Bice 740 Keats) cuore 
viburni, terminal anten- myia viburni, last 
nal segment of male (enlarged, abdominal segment (en- 
original) 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 subtriangular; 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; 
