1921] Huckett: Ovipositor of Anthomyian Genera 297 
adjoining sclerites; accessory pieces absent; marginals diverse, regular; 
spiracles approximate, the width of the sternum apart, oblique,t 
posterior spiracles cephalad of the caudal margin. Sternum lanceolate, 
tapering to both margins; marginals approximating, in pairs; con- 
junctiva smooth, ornamented with rough chitinous thickenings. 
Segment VII. Similar to segment VI in structure, the tergites less 
extensive along the margins; discal area well marked, roughened by 
chitinous thickenings; marginals diverse, regular; accessory pieces 
absent. Sternum lanceolate, tapering cephalad, rounded caudad; mar- 
ginals approximate; conjunctiva, smooth, chitinized. 
Segment VIII. Tergum divided bilaterally into two irregular plates 
somewhat similar to those of the corresponding segment in antiqua 
except that the dorsal surface of the lateral plates becomes more 
markedly sinuous giving the discal area a decided constriction at the 
middle; marginals short, regular, with strong lateral sete. Sternum 
similar in structure and character to that of antigua sete distributed 
‘over the entire surface, two strong, remainder short spinelike; con- 
junctiva smooth, chitinized. 
Segment IX. Suranal plate scoop-shaped; sete barely the width of 
the club apart, setule few; subanal plate spinulose, spade-shaped to 
conical, setze apart, a fringe of setule around the margin, surface cov- 
ered with short spinelike setae; cerci smooth, petiolate, conical to sub- 
cylindrical; apicals long, setz diverse, long, fine, more abundant than 
in cilicrura or antiqua, clothing the club and petiole; sense organs two, 
apical, papille short. 
Chortophila cerulescens Strobl.* 
Segments and intersegments of equal length, sclerites glabrous 
except for the subanal plate which is spinulose. Intersegments spinulose, 
each successive membrane from the first to the third becoming more 
densely spined; spinules broad at their bases giving the appearance 
on the third intersegment of being clothed with scales, similar to cinerella 
and parva. 
Segment VI. Tergum composed of two lateral plates each shaped 
like an inverted “L,”’ somewhat flaring along the caudal margin, tapering 
cephalad; accessory pieces present, distinct; marginals few, two or 
three, equal,t distributed dorsad; discal area hyaline, membranous, 
occupying the greater part of the tergal region; spiracles closely approx- 
imate, directly cephalad of the accessory pieces, posterior spiracles of 
greater diameter than the anterior and situated slightly oblique. Ster- 
num much reduced, a small quadrangular sclerite adjacent to the caudal 
margin, pointed cephalad; marginals separated into two lateral groups 
‘of a few setz each; conjunctiva smooth, hyaline. 
Segment VII. Tergum composed of two narrow lateral tergites 
-whose form is maintained undiminished to the cephalic margin, caudad 
the ventral borders are rounded off so that the marginal plates are lim- 
} Oblique=Spiracles placed at an angle to the longitudinal axis of the insect. 
t Equal=The same in size and length. 
