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KAHL: NEW SPECIES OF SYRPHIDA. i43 
yellow band with its anterior outline convex and not reaching the 
lateral margin; on each side of the third and fourth segments a 
somewhat V or U-shaped, yellowish pollinose mark, concealing the 
black ground color, both its branches diverging and not reaching 
the preceding segment, the inner branch of one mark converging 
with that of the other; fifth segment wholly black, not at all polli- 
nose, the sparse pubescence, mixed yellowish and blackish, in no 
way concealing the ground color; the ventral segments black, pos- 
teriorly margined with pale yellow on the second, third and fourth 
Segments, very narrowly on the fourth. broadest on the second, 
thinly provided with whitish pubescence. Legs dark reddish 
brown; coxe black, brownish at tip; all trochanters, the extreme 
base of the front and middle femora, the base of the hind ones 
broadly, the knees, the base of all the tibia, broadly on the middle 
and hind ones, and the two basal joints of the middle tarsi, yellow- 
ish; the color at base of tibia pale; the third and fourth joints of 
the front and middle tarsi, and the four distal joints of the hind 
Ones, blackish; basal half of the front femora black: hind side 
of middle femora fringed with whitish hairs; the distal half of the 
femora beneath with two rows of minute black spines, most 
Conspicuous on the hind, least on the front ones; hind femora 
thickened, but not more so in the middle. Halteres and tegule 
yellowish. Wings with the anterior half brown, the posterior one 
hyaline; the brown is limited posteriorly by the fourth vein at base, 
and by the spurious vein to very little beyond the anterior crossvein, 
Wherefrom the brown extends with the outline concave to the third 
vein, narrowly bordering it posteriorly a short distance before the 
Stump of a vein, which it follows exteriorly, thereafter rather 
broadly bordering the third vein posteriorly with its outline diverg- 
ing from that vein; the extreme margin of the wing immediately 
beyond the apex of the third vein is, however, greyish hyaline, not 
brown; at base of the wing the color is yellowish; the cells in the 
brown field are somewhat lighter along their middle. The veins 
sinha dark brown, at the base of the wing and the portion of the fifth 
vein. between second basal and anal cells yellowish brown; this 
Portion of the fifth vein is anteriorly and posteriorly bordered with 
yellowish brown, which encroaches upon the extreme base of the 
third Posterior cell; last section of the third vein forms before its 
middle a very slight angle, wherefrom a short vein projects into the 
first posterior cell. 
Three female specimens captured by the writer at Lawrence, 
Kansas. 
Dedicated to my learned friend, the eminent dipterolo- 
Sist, Dr. S. W. Williston, of Kansas State University. 
