DIPTERA, 34] 
incumbent on it, are thick, pilose, conical, compressed and biarticu- 
lated. The sucker inclosed in the proboscis is composed of six small 
pieces, in the form of lancets, which, by their number and relative 
situation, correspond to the parts of the mouth in the Coleoptera. 
The wings are extended horizontally on each side of the body. The 
alulee almost completely cover the halteres. The abdomen is trian- 
gular and depressed. “The tarsi are furnished with three pellets. 
These Insects begin to appear towards the close of spring, are very 
common in the woods and pastures, and produce a humming noise 
when on the wing. They even pursue Man in order to suck his 
blood. Beasts of burden, having no means of repulsing them, are 
most exposed to their attacks, and are sometimes seen covered with 
blood from the wounds they inflict. The Insect mentioned by Bruce, 
under the name of T’salisalya, which is dreaded even by the Lion, 
may possibly belong to this genus. 
In some, the proboscis is much longer than the head, slender, 
siphoniform, squamous, and usually terminated in a point, with the 
palpi very short in proportion to its length. The last joint of the 
antennze is divided into eight annuli. They form the subgenus 
Panconta, Lat., Fab. Tanyauossa, Meig. 
These Insects are only found in hot climates, and feed cn the nec 
tar of flowers like the Bombylii*. 
In the others the proboscis is shorter, or hardly longer than the 
head, membranous, and terminated by two large lips; the length of 
the palpi is at least equal to half that of the proboscis, and the last 
joint of the antenne is divided into five or four rings. 
Sometimes the antenne are hardly longer than the head ; the last 
joint, which is somewhat lunate and subulate, is divided into five 
rings, the first very, large with a tooth superiorly. They constitute 
the subgenus 
TABANUS proper, 
To which belongs that well-known species, 
T. bovinus, L.; De Geer, Insect, VI, xii, 10, 11. An inch 
long ; body brown above, grey beneath; eyes green ; tibize yel- 
low; transverse lines and triangular spots of pale yellow on the 
abdomen; wings transparent, with russet-brown nervures, 
The larva lives in the ground. It is elongated, cylindrical, 
and attenuated towards the head, which is armed with two 
hooks. The annuli of the body (twelve) are marked with raised 
cords. The nymph is naked, almost cylindrical, with two tu- 
bercles on the front, cilia on the margin of the annuli, and six 
* Encye. Méthod., article Pangonie. See also Meigen and Wiedemann. 
Some species are destitute of ocelli, and form the genus PHILOLIcHE of Count 
Hoffmansegg, Wied., Dipt., Exot., 54. Others in which the proboscis projects, as 
in Pangonia, but ascends, where the palpi consist of three joints instead of two, and 
the antenne resemble those of Tabanus proper, compose the genus RHINOMYIA, 
Wied., Ib., 69. 
Those, which he calls RAPHIORHYNCHUS and ACANTHOMERA placed by him be- 
tween the preceding genus and Tabanus, according to our method, belong to the 
family of the Notacanthi. 
