1921] Huckett: Ovipositor of Anthomyian Genera 313 
Segment VIII. Tergum reduced to two subtriangular tergites 
whose posterior angles are produced ventrad and dorsad, coinciding 
with the caudal margin, cephalad the apices reach the cephalic margin; 
discal area membranous, widely separating the tergites and occupying 
the entire dorsal region; marginals diverse, irregular. Sternum reduced 
to two small triangular sclerites adjoining the cephalic margin; setz 
short, fine; conjunctiva spinulose. 
Segment IX. Suranal plate broad, scoop-shaped, apex rounded; 
setee wide apart, equal to the breadth of the club, setulae numerous, 
strong; subanal plate broadly spade-shaped; sete stout, distributed 
apically and at the basal angles; setule short, surrounding a spinulose 
discal area; cerci spinulose, ovoid, sessile; apicals single; setule few, 
confined to the distal region of the club; sensory organs, small, apical. 
Pegomyia hyoscyami Panzer. 
Ovipositor short, compressed, slightly longer than the fifth abdom- 
inal segment, spinulose except for the cephalic margin of the sternites; 
the latter longer than the intersegments, breadth twice length. Inter- 
segments reduced to narrow transverse membranes. 
Segments VI. Tergal region occupied by a spacious discal area, 
extending from side to side, margin to margin; bounded laterally by 
angular chitinous plates that project ventrad; accessory pieces absent; 
marginals diverse, irregular; spiracles wide apart, in the same plane, 
posterior spiracles situated caudad of the margin, in the membrane of 
the second intersegment. Sternum consists of a broad plate, similar to 
that of the fifth abdominal segment, posterior angles rounded, anterior 
angles square, the entire surface except along the cephalic margin cov- 
ered with diverse sete, cephalic margin glabrous; conjunctiva reduced 
to narrow articulating membranes between the sternum and tergum. 
Segment VII. Tergum similar to segment VI in appearance, the 
tergites confined to the caudo-ventral regions of the dorsum, tapering 
cephalad and dorsad, the ventral margins anastamose with the borders 
of the sternum, appearing to form a continuous sclerite with the ster- 
num, the dorsal margin glabrous, the remaining surface sparsely cov- 
ered with diverse setae. Sternum cordate, humped anteriorly, occupying 
nearly the whole sternal region, lateral borders anastamose with the 
ventral margin of the tergites, cephalic margin glabrous, the remaining 
surface covered with setze; conjunctiva reduced to the cephalic margin, 
and is confluent with the tergal membrane. 
Segment VIII. Tergum composed of a transverse chitinous plate, 
completely encasing the tergal region, spinulose except for a hemi- 
spherical area along the cephalic margin; marginals irregular, distrib- 
uted along the caudal margin and about the ventral region. Sternum 
composed of three chitinous sclerites; two lateral hemispherical sclerites, 
approximating toward the caudal margin, gradually diverging cephalad; 
into the angular space thus formed fits the triangular apex of the 
median anterior sclerite, the latter continues cephalad as a narrow plate, 
surpassing the cephalic margin and dissecting the third intersegment 
into two lateral regions; the sclerites are spinulose except for the dorsal 
