71 
of New Exotic Aculeate Hymenoptera. 
the occiput, in a triangle ; the whole face, pleurae, and sides of 
the metathorax, covered with a close golden down. 
The posterior margin of the prothorax, a spot at its lower angle 
in front, just above the coxae of the anterior legs, and a small mark 
beneath the scutellum, white. The tegulae piceous ; the wings hya- 
line, with their nervures black. The legs rufo-testaceous, with the 
anterior and intermediate coxae yellow, and the apex of the pos- 
terior tibiae, and their tarsi entirely, piceous. The anterior and in- 
termediate femora and tibiae short, incrassate, compressed, their 
tarsi not longer than their tibiae ; the posterior pair of legs very 
long and slender, being nearly twice the length of the whole body, 
and their tarsi twice the length of the tibiae. The abdomen rufo- 
testaceous, immaculate. $ . 
From the Brazils ? 
In my own Collection. 
Obs. — The extraordinary disparity in the legs of this insect 
makes it especially remarkable. I am not quite sure that it is from 
the Brazils, but I purchased it from a dealer with other undoubted 
Brazilian insects. The immaculate abdomen also is singular, as in 
its congeners it is generally spotted or banded. 
Genus. Exeirus,* Shuck. Plate VIII. fig. 2. 
Head small, subglobose. Antennce filiform, with twelve joints 
in the $ , and thirteen in the $ ; the scape short, robust ; the 
pedicle very small, nearly concealed within the scape, the third 
joint the longest, the rest gradually decreasing in length, sub- 
cylindrical, inserted in the centre of the face above the cly- 
peus. The stemmata placed in a close triangle, rather below the 
vertex. Eyes inclining forwards, not strictly lateral. Clypeus 
transverse, projecting, slightly emarginate in front. Labrum 
longitudinal, subquadrate, the anterior angles rounded. Man- 
dibles large, robust, slightly arcuate, subquadridentate; the ex- 
ternal and the third tooth the largest, the external one obtuse. 
Thorax gibbous. Prothorax transverse, very slightly curving 
laterally. Scutellum scarcely distinct, a triangular space en- 
closed by furrows at the base of the metathorax. The wings 
with one elongate marginal and four submarginal cells, the 
fourth apical, and the second petiolated, receiving the first re- 
current nervure near its centre, and the second towards its 
extremity ; the third cell very much curved. The legs long, 
robust ; the tibiae strongly spinose, 5 and the anterior tarsi 
ciliated 2 , simple in the $ ; the terminal claws very large. 
* eisero. 
