1921] Huckett: Ovipositor of Anthomyian Genera 305 
Segment VII. Tergum. similar in structure to segment VI, the 
caudal margin somewhat constricted; accessory pieces present, dis- 
tinct; marginals few; discal area membranous, hyaline. Sternum lan- 
ceolate, rounded caudad, tapering to a point cephalad, attaining the 
length of the segment; marginals separated into two lateral groups; 
conjunctiva lightly spinulose. 
Segment VIII. Tergum composed of two lateral plates which flare 
caudad so as to envelop the margin, cephalad the plates curve dorsad, 
approximating at the cephalic margin; discal area with chitinous 
granulations, constricted cephalad; marginals equal, distributed reg- 
ularly in a single row. Sternum, two small ovoid sclerites bordering the 
caudal margin; sete strong, spinelike, scattered throughout; con- 
junctiva smooth. 
Segment IX. Suranal plate scoopshaped; sete approximate, less 
than the width of the club apart, setule few; subanal plate spade- 
shaped; setee equidistant, bordering the apical margin, setule spinelike, 
distributed over the surface; cerci clubbed, petiolate, smooth; apicals 
two or three, setule long, diverse; petiole smooth; sense organs, two 
apical tubercles. 
Chortophila parva Desvoidy. 
Segments slightly longer than the intersegments, sclerites glabrous 
except the subanal plate which is spinulose. Intersegments spinulose, 
increasing in density according to successive intersegments, spinules 
broad at their base, not recurrent, becoming much coarser in interseg- 
ment three; structure and character very similar to cinerella and 
cerulescens scalelike in appearance. 
Segment VI. Tergum denoted by a chitinized caudal half and a 
clear hyaline cephalic half, the caudal region composed of two bilat- 
erally symmetrical plates, somewhat crescentshaped, bounding a clear 
hyaline discal area; accessory pieces present; marginals few, short, 
usually two; spiracles closely approximating, in a horizontal plane, 
side by side, directly cephalad of the accessory pieces. Sternum reduced 
to a small pear-shaped sclerite adjacent to the caudal margin; mar- 
ginals separated and arranged in two lateral groups; conjunctiva 
smooth, hyaline. 
Segment VII. Tergum composed of two chitinous rods situated 
subdorsad, from the caudal to the cephalic margins; at the extremities 
the rods tend to approximate, constricting the long hyaline discal area; 
accessory pieces present, distinct; marginals few, short, usually two, 
distributed dorsad. Sternum reduced to a small triangular sclerite 
adjacent to the caudal margin; marginals separated into two groups, 
wide apart; conjunctiva smooth, hyaline. 
Segment VIII. Tergum composed of two chitinous rods, subdorsad, 
that expand at their caudal extremities to invest the margin of the 
segment, cephalad the rods approximate reaching the cephalic margin; 
marginals few, short, bristlelike, regular. Sternum similar in structure to 
