280 INSECTA. 
Bacon, Meig. Fab. 
Another subgenus closely allied to the preceding, only differing in 
the abdomen, which is proportionally longer, narrowed at base, and 
terminated in the manner of an elongated club. : 
To this subgenus, in my opinion, should be referred the Syrphus 
(Sceva, Fab.) conopseus of Meigen, although the palette of the an- 
tennz is less orbicular than in Baccha(1). 
We now pass to other subgenera, similar to the preceding ones, as 
to the form of the snout and the seta of the antennz, but in which the 
length of these organs is at least equal to that of the face of the 
head. 
Here, the antennz are not placed on a common pedicle, and their 
length does not surpass that of the head. 
Paracus, Lat., Meig.—Mulio, Eab.(2) 
Here, they arise from a common eminence, and are longer than 
the head. 
Sometimes the seta is lateral. 
Spuecomyl!A, Lat. 
Where it is inserted on the second joint; the last is much shorter 
than the two others, than the first in particular, and almost ovoid; 
the latter and the second are long and cylindrical. 
I have established this subgenus on an Insect taken in Carolina by 
the late M. Bosc. 
Psarus, Lat. Fab. Meig. 
Where the seta of the antennz is inserted on the back of the third 
joint, near its extremity; this joint almost borders on an oval, and is 
nearly of equal length with the second; the first is much shorter. 
The common peduncle is proportionally higher than in the analo- 
gous subgenera. The wings are incumbent(3). 
(1) Meig., Ibid. 
{2) See Latreille and Meigen. 
(3) Idem. 
