1921] Huckett: Ovipositor of Anthomyian Genera all 
situated along the ventral margin. Sternum spinulose, lanceolate, 
attaining the length of the segment; marginals separated into two 
lateral groups; conjunctiva spinulose. 
Segment VII. Similar in structure to segment VI, the sternum 
spinulose, expanding into a broader sclerite caudad; marginals wide 
apart; conjunctiva spinulose. 
Segment VIII. Tergum spinulose, divided by the median discal 
area into two broad quadrangular lateral plates; marginals diverse, 
irregular. Sternum spinulose, consisting of two elongate sclerites, 
attaining the length of the segment, tapering at both extremities; sete 
few, usually two; conjunctiva smooth. 
Segment IX. Suranal plate pubescent, scoop-shaped; sete long and 
stout, setulae numerous, bristlelike; subanal plate spinulose, broadly 
spade-shaped; sete, three pairs on the apical third, setule diverse, 
numerous; cerci pubescent, short petiole, knobbed; apicals stout, 
setule diverse, long and stout, distributed over the distal region; sense 
organs consist of two spined tubercles. 
Hylemyia variata Fallen. 
Segments longer than the intersegments, breadth twice the length. 
Intersegments spinulose except the fourth which is smooth on the 
ventral surface. Spinules arranged in no regular striations. 
Segment VI. Tergum spinulose, divided by a thinly chitinized 
median strip into two quadrangular plates which encase the sides of 
the segment, dorsal and ventral borders ragged; accessory pieces ab- 
sent; marginals equal, even, regular; spiracles barely the breadth of 
the sternum apart, oblique, posterior spiracles situated cephalad of 
the caudal margin. Sternum spinulose, attaining the length of the 
segment, broadly expanding caudad, tapering to a blunt point cephalad; 
marginals widely separated into two lateral groups; conjunctiva 
densely spinulose. 
Segment VII. Similar in structure and character to segment VI. 
The tergum divided by a more pronounced median discal area into two 
lateral quadrangular plates, the latter are not so extensive as in segment 
VI. Sternum tapering more decidedly to a point, scarcely attaining 
the caudal margin. 
Segment VIII. Tergum divided by a broadly expanding discal area 
into two broad, lateral, heavily chitinized plates, the latter expanded 
caudad, adhering to the margin and almost fusing across the mid- 
dorsal line; marginals few, equal, regular; the region along the caudal 
margin and projecting for some distance onto the discal area densely 
spinulose. Sternum glabrous, composed of two small elongate to oval 
sclerites, adjacent to the caudal margin; setz distributed irregularly; 
conjunctiva smooth. 
Segment IX. Suranal plate pubescent, hemispherical, sete approx- 
imate long; subanal plate spinulose, spade-shaped, setz and setule 
nearly equal, few and sparsely distributed over the surface; cerci 
pubescent, knobbed, short petiole; apicals long and stout, setule dis- 
tributed over the club; sense organs apical, consisting of two spined 
tubercles. 
