1921] Huckett: Ovipositor of Anthomyian Genera 307 
Genus Hyleggyia Desvoidy. 
Hylemyia emene Walker, flavicans Stein and alcathee Walker. 
Up to the present no accountable differences are to be observed in 
the structure, vestiture or cheetotaxy of the three above named species. 
The three species in common may therefore be treated under the same 
description. 
Segments and intersegments of equal length, sclerites glabrous 
except the subanal plate which is spinulose. Intersegments spinulose on 
the ventral surface except the fourth which is smooth throughout, on 
the dorsal surface intersegments one, two and three spinulose along the 
cephalic margins and for a greater or less distance along the region of 
the mid-dorsal line, remaining area smooth, hyaline. 
Segment VI. Tergum completely chitinized, encasing the dorsal 
region, cephalic border indeterminate; accessory pieces absent; mar- 
ginals diverse, regular; spiracles oblique, the width of the sternum 
apart, posterior spiracle on the caudal margin. Sternum lanceolate to 
pegshaped, tapering to a blunt point on the cephalic margin, truncate 
caudad; marginals approximate; conjunctiva spinulose on the caudal 
half, smooth cephalad. 
Segment VII. Tergum similar in structure to segment VI, thinly 
chitinized on the discal region; marginals diverse, regular. Sternum 
pegshaped, tapering cephalad; marginals bordering the caudal margin; 
conjunctiva, caudal third spinulose, remaining surface smooth. 
Segment VIII. Tergum composed of two lateral plates which tend 
to approximate toward the cephalic margin, gradually tapering to a 
point, caudad the extremities flare and coincide with the margin, nearly 
fusing across the mid-dorsal line; discal area broad, hyaline; marginals 
diverse, regular. Sternum composed of two broadly ovoid sclerites that 
taper to a point at both ends, attaining one-half the length of the seg- 
ment; setz distributed over the surface irregularly; conjunctiva smooth. 
Segment IX. Suranal plate scoop-shaped; sete strong, approx- 
imate, setule strong, spinelike; subanal plate spade-shaped to conical; 
setze long; setulae beside the margins long, remainder short; cerci 
smooth, petiolate, club clavate to subcylindrical, clothed with long fine 
setule, apicals long and fine; sense organs apical, consist of two large 
membranous discs from which emerge fine hairlike papille, also two 
small spined tubercles, the former give the club a truncate or ‘“‘chipped”’ 
appearance. 
Hylemyia coarctata Fallen.* 
Segments and intersegments of equal length, sclerites glabrous 
except the subanal plate which is spinulose. Intersegments spinulose on 
the ventral and smooth on the dorsal surfaces except for the fourth, 
which is smooth throughout. 
Segment VI. Tergum composed of one thinly chitinized plate 
encasing the dorsal region, cephalic margin indeterminate; accessory 
pieces present; marginals few, equal, regular; spiracles the width of 
