214 Annals Entomological Society of America [Vol. V, 
times in part); all following segments; ovipositor and its sheaths; legs, 
except anterior knees and four basal joints of anterior tarsus; the middle 
tarsi brownish on first four joints. The wings have the stigma black 
and are strongly infuscated beyond the basal vein, though pale yellowish 
toward the base. Head nearly twice as wide as thick, rounded and 
narrowed behind the eyes. Front above the antenne with a deep 
depression that is divided by a fine, sharp median carina; antennal 
tubercles rather short. Face finely rugose, faintly reticulate, with a 
vertical raised line extending from each antennal tubercle to the clypeus 
and a second near to the eye. Clypeus crescentic, margined above by 
a fine line and fringed below with a brush of porrect pale yellow hairs. 
Eyes large, oval, fully five times as long as the malar space. Antenne a 
little shorter than the body; scape as long as the width of the eye, 
broadened apically; first flagellar joint nearly twice as long as wide; 
second not quite half longer than wide; following nearly quadrate. 
Mesonotum with the parapsidal furrows impressed anteriorly, conver- 
gent. Scutellum with a smooth impressed line across the base. Meta- 
thorax smooth and polished; sparsely punctulate on the sides. Abdomen 
elongate, as long as the head and thorax, and but little wider; raised 
median portion of first segment narrowed in front, but attaining the 
base of the segment; close to it on each side is a carina. Second segment 
with a small median tubercle in front, on each side of which is a foveate 
depression, without lateral carinz or separated corners; its suture with 
the simple third segment smooth. Third segment the longest, nearly 
half as long as broad. Mesopleura with the femoral furrow narrow; 
the metapleural depression rather deep and lying just outside the 
elongate reniform spiracle. Legs stout, the tarsi much shortened and 
flattened, especially those of the middle and fore legs; clothed with 
sparse, glistening pale hairs, denser on the tibia and black on the hind 
ones. Wings with the stigma lanceolate; submedian cell as long as the 
median; first section of cubitus strongly curved so that its base runs 
nearly parallel for a short distance, its origin being at the upper third of 
the basal vein; recurrent nervure received at the apical fifth of the first 
cubital cell; first section of radius one-third as long as the second and 
two-thirds as long as the first transverse cubitus; second transverse 
cubitus slightly oblique, with a hyaline spot near its top and bottom; 
discoidal vein broken at its lower third. 
Male. Length 9 mm. In this sex the anterior tibize are almost 
entirely fulvous; the second trochanters of the fore and middle legs are 
ferruginous and the first four joints of the middle tarsi are yellowish. 
The tarsi are not thickened and their pile is dark, except on the anterior 
pair. Palpi entirely pale. The black on the fifth abdominal segment 
is also more extensive, covering the surface except on the sides and the 
posterior edge. 
Five specimens, four females and one male from Rio Madeira, 
Brazil (Camp 39, Madeira-Mamoré R. R.) Mann and Baker. 
This is a very distinct species on account of the peculiar 
form of the tarsi in the female and the conspicuous color pattern. 
