356 INSECTA. 
gated, and the abdomen conical, or almost cylindrical and con- 
vex *. 
Pipiza, Meig.—Pswora, Meig.—Enistauis, Fab.—Mivesia, Lat., 
Where the posterior legs are merely somewhat larger than the others, 
and the abdomen is depressed, semi-elliptical and rounded at the end. 
The eyes are pubescent. These Insects are closely allied to Syrphus, 
and particularly to Chrysogaster, Meig. + 
Bracuyopa, Hoff., Meiq., 
Distinguished from all the preceding subgenera by the wings, which 
extend considerably beyond the abdomen. These Diptera closely 
resemble the Milesiz, and appear to lead to Rhingia, the last sub- 
genus of this tribe. According to Meigen the seta of the antenne is 
pilose at base, but I never could discover those hairs in any of the 
specimens I obtained. To this subgenus the same naturalist refers 
the Oscinis olive of Fabricius, which most certainly belongs to the 
Muscides {. 
In those Syrphidze, of which we have hitherto spoken, the pro- 
boscis is shorter than the head and thorax, and the projection forms 
a short and perpendicular rostrum. We now proceed to others in 
which that proboscis is evidently longer and almost linear, and the 
anterior projection of the head is proportionally more elongated, and 
directed forwards in the manner of a pointed rostrum. These In- 
sects, in their wings, which are incumbent on the body, and in the 
form of their antenne, closely resemble the Brachyopee and Milesiz. 
The thighs are simple. They form the 
Raina, Scop., Fab., Meig. § 
The genus 
Pexecocera, Hoffmanseg, 
Figured by Meigen, is unknown to us, but it is easily distinguished 
from all those whose antennz are shorter than the head, by the seta 
of the same organs, which is short, thick, slightly silky, cylindrical, 
and divided into three joints, the last of which is somewhat the 
longest. The palette almost forms a reversed triangle. 
The sucker of all the remaining Athericera consists of but two sete, 
the superior representing the labrum, and the inferior the ligula. 
They form three other small tribes which will correspond to the 
genera (Estrus and Conops of Linnxus, and to the Afusea, Fab. as 
originally composed. 
As Stomoxys and Bucentes are connected with this last genus, we 
will begin with the tribe of the CHsrripzs consisting of the genus 
* See Meigen, genera Mylesia, Tropidia. The palette of the antenne of the Tro- 
pidie is proportionally wide, and as if truncated, or very obtuse. . 
+ Idem, genera Pipiza and Psilota. 
* See Meigen. 
'§ Fab., Lat., Meig., &c. 
