ART. 4. REVISION OF THE FAMILY THEREVIDAE—COLE. 81 
third; the fifth is much broader and a little longer than the fourth; the first inferior 
areolet is closed. 
This description is of course inadequate, but the specific description 
is recognizable. 
Verrall considered Tabuda as a possible synonym of Xestomyza, 
‘and it is undoubtedly closely related to that genus and to Meta- 
phragma. The known species differ in general coloration and general 
habitus from Dialineura, and the eyes of the male are broadly sepa- 
rated, not holoptic as in that genus; the frons of the female is like 
that of Metaphragma, not evenly convex as in Thereva and more 
horizontal. The anal lamellae of the male genitalia are very large. 
TABUDA FULVIPES Walker. 
Plate 9, figs. 113, 115, and 117. 
1852. Tabuda fulvipes WALKER, Ins. Saund., Dipt., vol. 1, p. 197. 
Male.—Length 8 to9 mm. Head more horizontal than vertical, 
the eyes separated almost the width of the ocellar tubercle. Frons 
and ocellar tubercle gray pollinose, lower half of frons with long black 
pile; face gray pollinose, a brown mark from the base of antenna to 
eye, the black pile on sides of face reaching almost up to this mark. 
Cheeks white pollinose and pilose; occiput white pilose, the lower part 
white poilinose, the upper gray; post-ocular bristles numerous, black, 
long near the eye margin. Antennae brown, the first two joints gray 
pollinose; first antennal joint more than twice the length of the 
second and third combined and greatly swollen (fig. 113), pile black, 
bristles on apical half black; second joint very small, with short black 
pile. Palpi yellowish, with long white pile. 
Thorax black, mesonotum and scutellum grayish brown pollinose; 
pleura and coxae gray pollinose and white pilose; mesonotum with 
reclinate white pile and erect black pile; scutellum with white pile 
and four marginal black bristles. Stem of halteres yellowish, the 
knob yellowish brown, base of the knob blackish brown. 
Abdomen black, gray pollinose, the dorsum silvery, the venter 
somewhat silvery beyond the first segment. All the abdominal pile 
white. Abdomen with seven visible segments, the fifth, sixth, and 
seventh about equal in length to the fourth. Genitalia, including 
the large anal lamellae, brownish yellow, most of the pile white, but 
with a few black hairs; short black hairs on the anal lamellae. Struc- 
ture of the genitalia quite characteristic. (Fig. 115.) Venter with 
a white posterior margin on the second segment. Femora brownish 
yellow, the tips blackish, the pile white; tibiae and the first two tar- 
sal joints yellowish, the apices and the other tarsal segments black. 
Wings whitish hyaline, the veins and stigma brown; costal region 
