JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
DESCRIPTION OF THE IMMATURE STAGES 
Ula elegans Osten Sackcn. 
Ula elegans Osten Sacken. Monographs of the Dlptera of 
North America, part IV, pp. 276, 277, 1869. 
Larva 
(Plate I, Fig. 2) 
Length: Maximum, 8.5-11.9 mm.; diameter, 1.4-1.8 mm. 
Color of the larva dull white, the head-capsule very dark brown- 
ish black, shiny. The caudal end of the body is produced into five 
blunt teeth of which the dorsal one is median in position, two lateral 
teeth slightly above the plane of the body, and two ventral teeth 
directed laterad; the dorsal tooth is more blunt than the others. 
The inner or caudal face of each tooth is adorned with a conspicu- 
ous brownish black mark; the mark of the lateral tooth (see Plate 
I, Fig. 3) is large, its outer end conforming with the shape of the 
teeth, rounded at the tip, inner end concave, not touching the stig- 
mata, separated from the stigma by a space about equal to the 
light brown outer portion of the spiracle. Ventral teeth with the 
black mark shaped as follows: Elongate, the dorsal outer face 
gently convex, the inner ventral face gently convex on the terminal 
portion, concave near the dorsal end; its dorsal or inner end is 
separated from the spiracle of the same side by a distance a little 
less than the diameter of the spiracle. Dorsal tooth with the mark 
small, elongate-oval. A fringe of delicate blackish hairs around 
the caudal end on the outside of the black marks and running inward 
between the teeth; these hairs are longer and more prominent at 
the ends of the teeth. Stigmata almost round, very widely separa- 
ted from one another, the space between being about three times 
the diameter of a single spiracle. Interstigmal disk pale with an 
indistinct mark shaped as in the figure. 
Head-capsule rather oval. Antennae (see Plate I, Fig. 5) in- 
serted on the sides of the front, just laterad of the caudal margin 
of the clypeo-frontal sclerite; basal segment rather short, cylin- 
drical, more widened at its base, the tip with two small conical lobes 
that are almost transparent. Clypeo-frontal sclerite (see Plate I, 
Fig. 7) broad at the base, the cephalic margin broadly rounded, 
