FRUIT FLIES OF GENUS TOMOPLAGIA — ACZEL 327 



section of fourth vein between both cross-veins. Second costal section 

 the longest, fourth and first sections shortest, basal section of fourth 

 longitudinal vein shorter than, equal to, or longer than the ultimate; 

 anal (cubital) cell with a longer or shorter apical process by rectangu- 

 lar curvature of vein Cu2. Ratio of entire length of anal cell to 

 length of apical process variable, ranging from 1.8 to 4.5; entire cell 

 2.2 to 3.2 times as long as apical process; petiole of anal cell usually 

 weaker toward posterior wing margin and rarely attaining it, except 

 for a foldlike continuation in some species; second basal cell hyaline 

 and yellowish in the majority of species. Axillary lobe well developed; 

 alula relatively small, the basal part bare, without microtrichiae. 

 Halteres usually yellow, in some species the knob partly brownish. 



Legs usually without special characters except in two species, which 

 have apical third of midtibiae anteroposteriorly compressed and dor- 

 soventrally dilated, with a dorsal group of short, strong, black bristles ; 

 legs and coxae entirely yellow; distal one or two tarsal segments of 

 middle and hind legs sometimes infuscated. A conspicuous postero- 

 dorsal row of rather closely spaced, brownish yellow to black, short 

 and erect bristlelike hairs on hindtibiae of all species. 



Preabdomen mostly wide-oval, almost as wide or slightly wider 

 than long, in some species oval to long-oval. Preabdomen of male 

 of five segments, that of female of six; tergites and intersclerital mem- 

 brane well developed, sternites rather narrow; first and second tergites 

 coalesced, forming the first and second syntergite; first tergite with a 

 pair of lateral processes, as usual in the higher flies. Fifth tergite of 

 male 1.2 to 2.5 times as long as fourth and tapering toward posterior 

 margin; fifth tergite of female approximately as long as, shorter, or 

 longer than fourth, contradicting Hering's (1947) definition of the sub- 

 family Trjrpetinae ("Letztes tergit des 9 stets kiirzer als das vor- 

 letzte"). Tergites covered with brownish yellow to black apressed 

 hairs. Male postabdomen small, revolute, hidden under fifth tergite; 

 epandrium (ninth and tenth syntergite) together with the short, in- 

 curved surstyli oval to wide-oval, terminal surface with cerci turned 

 downwards, similar in structure to that of some higher Tephritinae 

 (Trupanea, Paroxyna, etc.) ; short surstyli usually forming, in profile, a 

 direct continuation of body of epandrium, thus very different from that 

 of Rhagoletis and allied genera. Usually two pairs of shining black, 

 toothlike gonapophyses present, but posterior (lateral) pair more 

 acute and more or less reduced, weaker and shorter than anterior 

 pair, sometimes entirely absent. Irretractable basal part of ovipositor 

 (sheath) flattened dorsoventrally, sometimes subcorneal; shining, 

 usually entirely translucent to opaque yellow; surface covered with 

 short, fine, apressed hairs; subequal to, slightly shorter than, or 

 slightly longer than width at base ; ratio of length of thorax to length 



