1921] Huckett: Ovipositor of Anthomyian Genera 303 
spinulose, narrow sclerites that attain two-thirds the length of the 
segment; sete few, diverse; conjunctiva, spinulose, the cephalic mar- 
gin of the segment bordered by spinules throughout. 
Segment IX. Suranal plate glabrous, scoop-shaped, sete very long; 
subanal plate spinulose, spadelike, setee normal, fairly long; setule 
sparsely distributed; cerci glabrous, small, knoblike, petiolate; setz 
short, stout, two or three apicals on each cercus, setulee short, bristlelike 
confined to the club. 
Chortophila longula Fallen.* 
Segments and intersegments of equal length, sclerites glabrous 
except the subanal plate which is spinulose, marginals of the terga equal, 
evenly distributed in a single row along the caudal margin of the seg- 
ments. Intersegments smooth, hyaline, transparent, except the base of 
the first intersegment which is spinulose. 
Segment VI. Tergum lightly chitinized, encasing the dorsal region 
as a homogeneous plate, except for the ill-defined notch-like discal area 
which partitions the cephalic margin; accessory pieces present; spir- 
acles closely approximate, oblique, near to the caudal margin. Sternum 
lanceolate, attaining half the length of the segment; marginals few, 
separated into two groups; conjunctiva smooth, with slight chitinous 
granulations. 
Segment VII. Tergum composed of a strong marginal plate, from 
the lateral boundaries of which extend two chitinous plates cephalad. 
At times there develops along the mid-dorsal line a median chitinous 
thickening; discal area hyaline; accessory pieces present. Sternum 
reduced to a short, oblong plate, about half the length of the segment; 
marginals few, wide apart; conjunctiva smooth, with chitinous 
thickenings. 
Segment VIII. Tergum similar in structure to segment VII, the 
lateral plates slightly undulating and taper gradually toward the 
cephalic margin; discal area hyaline, sometimes divided by a median 
chitinous thickening. Sternum composed of two short tapering plates 
adjoining the caudal margin; sete few; conjunctiva, smooth, hyaline. 
Segment IX. Suranal plate scoop-shaped; sete wide apart, exceed- 
ing the breadth of the club by twice; setulz five or six, between the 
setae; subanal plate spinulose, spade-shaped; sete distributed along 
the margin; setule diverse; cerci smooth, conical, petiolate; setzx 
short, apicals strong; setulae few; sense organs four, contiguous, situated 
towards the apex of each cercus. 
Chortophila muscaria Meigen. 
Segments longer than the intersegments; marginals long, diverse, 
scattered around the caudal margin of the segments. Intersegments 
spinulose, except for the dorsal region of the fourth which is reduced 
to a hyaline transverse strip; the remaining membranes are densely 
spinulose, the spinules increasing in size from the first to the third inter- 
segment; similarly a clear membranous strip defines the caudal margins 
