- 1921] Huckett: Ovipositor of Anthomyian Genera 317 
Segment VIII. Tergum composed of two lateral plates whose caudal 
extremities develop dorsad to fuse across the mid-dorsal line, cephalad 
the plates taper and tend to approximate; discal area hyaline; mar- 
ginals equal, regular. Sternum composed of two ovoid sclerites with 
the apices prolonged to a point, attaining one-half the length of the 
segment; sete few, one or two, the surface densely pubescent; con- 
junctiva smooth, hyaline, fringed with pubescense at the caudal margin. 
Segment IX. Suranal plate scoop-shaped; sete wide apart, 
exceeding the width of the club; setule few; subanal plate sparsely 
spinulose, spade-shaped to conical; sete regular, strong, bristlelike, 
~setulee short, scattered over the entire surface; cerci glabrous, knobbed, 
shortly petiolate; apicals and setulz similar in size and length, stout, 
bristlelike, distributed over the club and petiole; sense organs consist 
of three spined tubercles situated laterad. 
KEY.* 
(Exclusive of Pegomyia Desv.) 
A. Cerci pubescent or spinulose. 
B. Conjunctiva of segment VII smooth 
C. Suranal plate pubescent, cerci pubescent, intersegment 3 spinulose. 
D. Sternites of segment VIII spinulose, attaining almost to the 
Ce plrallicr manent vpn ae = Sips ete cms res strigosa var. nigrimana Fabr. 
DD. Sternites of segment VIII glabrous, confined to caudal region. 
variata Fall. 
CC. Suranal plate glabrous, cerci slightly spinulose, intersegment 3 spin- 
ulose on the ventral surface, smooth on the dorsal region........ 
dissecta Meig. 
BB. Conjunctiva of segment VIII spinulose. 
C. Segment VIII with sternites spinulose, tergum partly spinulose. 
fugax Meig. 
substriata Stein. 
CC. Segment VIII with sternites and tergites glabrous..... juvenilis Stein. 
AA. Cerci glabrous, suranal plate glabrous. 
- B. Cerci armed with upcurving stout spines. 
C. Sternites of segment VIII armed with upright, stout spines, suranal 
plate with 4 large hooks, cerci clothed with but few sete, 
candens Zett. 
CC. Sternites of segment VIII clothed with sete, suranal plate armed 
with numerous short hooks, cerci with conspicuous apical tufts 
(Bip O NE Sep arose a che POM Reh eee eo a a setiventris Stein. 
BB. Cerci clothed with sete. 
C. Subanal plate glabrous, subtriangular. 
D. Subanal plate setulose, sternites of segment VIII attaining the 
length of the segment, conjunctiva spinulose........ rubivora Coq. 
DD. Subanal plate with but one or two setule at most, sternites of 
segment VIII small, adjacent to the caudal margin, con- 
AUNCLIVAeStIOObimmtaycltnCepmiie st tage cs. eleis ap. se face Fae lipsia Wk. 
* For the sake of feasibility the characters have been restricted to the distal 
end of the ovipositor, with the exception of one couplet. 
