FAM. EMPIDID/E 303 
2. Outer half of the hind femora brown, front tibiae brown except at the 
base, hind tibiae wholly brown, last tarsal joint black; abdomen 
testaceous; veins largely bordered with brown. . . . . . . Sr. vamrpss, Loew. 
Legs entirely yellow, except sometimes the hind metatarsi and last 
maljointbrowml . 4 7.5. : SEPDXASE UO HUE gol DAE Eur S PUER MEC M 
3. Spine-like bristles of the under side of the middle fide fo) bud. 
spines of the middle tibi; cf stronger near the middle of the 
tibize;; upper side of hind femora c setose near the middle; hind. 
metatarsi. brown. 1 eroe NUR wpuWu cu es i eMe acu Sa 
Spine-like bristles of the under side * middle jebidra * S diow: 
spines of the middle tibiae C uniform to the end; extensor setze of 
the hind femora cf not developed, or strongerapicaly . . . 
4. Hind femora not distorted, their lower bristles in two rows, those of 
Un 
the outer half long and conspicuous, upper side of the hind 
femora with weak bristles only; hind tibi: externally pectinate; 
abdomen black. . . . . Bn rusteds QU. us cs C OTSSPINIPES, DOV.-Sp. (1). 
Hind femora c with a strong bend at t the middle, bere which is a 
dorsal row of strong curved bristles, the under side with a single 
row of bristles, denser on the basal half: hind tibiz not pectinate; 
BüdonienfesiaceQUus. 4.2 e cL NL EU SUU Ru sr ST. CURVIPES, nov. sp. (2). 
5. Hind tibiae c' with long dense hairs on the anterior face, flexor 
bristles of the hind femora closely set; two or three preapical 
(1) Stilpon spinipes, nov. sp. — Male. Length 1.3 mm. Black, the legs yellow, but the last tarsal joint black. 
Occiput very lightly pollinose, ocellar bristles minute, front subshining, palpi and proboscis yellow, base of the antenne 
yellow, thelastjoint black. "Thorax shining, very lightly pollinose in front, acrostichal hairs wanting on the posterior half 
of the dorsum, one row of seven dorsocentral hairs, scutellum with two bristles. Abdomen black, the last segment with four 
long black hairs, the pygidium large, forcipate. Front femora with a row of pale flexor bristles, under side of the middle 
femora with four stiff black spines located near the beginning of the outer third but without pale basal spines, middle tibize 
with a cluster of six contiguous black flexor spines engaging those of the femora and with about five additional black spines 
occupying the distal third, a strong preapical bristle on the middle femora, hind femora doubly pectinate on the antero- 
flexor side, the upper row with fourteen pale bristles extending the whole length of the femur, the lower row of eight longer 
dark bristles occupying the distal half, a row of smaller erect extensor bristles on the basal half of the hind femora, hind 
tibiz loosely pectinate on the extensor side, extensor side of the anterior tibia and the hind knees a little dusky. ^ Halteres 
brown. Wings smoky, the second vein ending beyond the middle of the wing, the second, third and fourth sections of the 
costa subequal, sections of the fifth vein proportioned nearly 1 : 2. 
One specimen, Waycross, Georgia. 
The species is closely related to Pectiniger, differing mainly in the structure of the legs. The male of Pectiniger has a 
single row of shorter bristles on the antero-extensor edge of the hind femora, the bristles of the hind tibize shorter, the flexor 
spines of the middle femora silky yellow and those of the middle tibize forming a uniform row along the distal three-fourths. 
(2) Stilpon curvipes, nov.sp. — Male. Length 1i mm. Head, thorax and pygidium shining black; abdomen 
testaceous ; legs including the coxe light yellow, the hind metatarsi and last tarsal joint darkened. Basal joint of the anten- 
nz yellow, outer joint broken, mouthparts yellow, front cinereous almost to the ocelli. Hairs of the thorax coarse, pleurze 
mostly shining; the inflated sides of the first abdominal segment black and pollinose.  Pygidium rather large, pollinose 
below, with a long slender apical process bearing four long hairs, the last abdominal segment fringed with long loose black 
hairs. Middle femora with an interrupted flexor row of black thorn-like setule along the basal three-fifths and with a long 
preapical bristle, middle tibize with a similar but double row along the outer half, hind femora with a strong lateral bend just 
beyond the middle, before the bend with a row of extensor bristles, beyond it the extensor bristles are irregular, underneath 
with a row of fourteen coarse bristles, of which eight are before the bend, hind tibia ciliate with twelve hairs along the 
antero-extensor edge.  Halteres black. "Wings narrowly oval, veins brown, very slightly bordered with brown, the second, 
third and fourth sections of the costa proportioned 1 : o.8 : 0.6, fourth vein with a very slight anterior curvature, almost 
straight, posterior crossvein oblique, forming an angle of fifty degrees with the fifth vein, sections of the fifth vein propor- 
tioned o.8 : 1, marginal cilia two-thirds às long as the posterior crossvein. 
One specimen, Wisconsin, July. 
