324 INSECTA. 
thorax, and setaceous, with the two first joints thickest. There are 
always three ocelli, the anterior or intermediate of which is the 
smallest. 
Bourropuiia, Hoffm. Meiq., 
Where they are arranged in a transverse line, 
M. Guerin has published a detailed description of a species uf 
this subgenus, in the Am. des Sc. Nat., X. Its larvee lives in the 
mushroom *. 
Macrocera, Jeiq., 
Where the ocelli form a triangle f. 
Sometimes the antenne, even of the males, are, at most, as long as 
the head and thorax. 
Some subgenera, in which the eyes are always entire, are removed 
from the others by their four posterior tibice, all furnished exteriorly 
with small spines, as in 
Mycertoruiia, Mergq., 
Where there are but two ocelli, very small and distant , and in 
Luria, Aezq., 
Differing from Mycetophila in their three approximated ocelli, the 
anterior of which is the smallest §. 
Sciopuina, Meig. 
The Sciophilea have the joints of their antennz less crowded, or 
more distinct than those of the Leize, and they are also hairy. Besides 
the closed cell which extends from the base to the middle, their wings 
present another complete cell, which is small, and corresponds to the 
first of those termed cubital in the Hymenoptera |}. 
From the subgenera in which the outer margin of the tibie is des- 
titute of spines, and where there are always three approximated 
ocelli, we will first separate those in which the antenne are composed 
of sixteen joints. 
Here the eyes are entire, and without any remarkable emargi- 
nation ¥. 
Praryura, Meig. 
To which he improperly unites the Ceraplatei, These Insects, in 
their wings and carriage, greatly resemble the Sciophile; but their 
first cubital cell is much larger; their antennae seem to be propor- 
tionally thicker and more compressed than those of the last subge- 
nera, and even slightly perfoliate. The abdomen of the females is 
widest near the end **. 
Synapua, Meigq., 
Where the wings present but a single cubital cell, closed by their 
* Meig., Dipt. T, 155. 
+ Meig., Ibid. 
+ Meig. Ibid. 
§ Lat., Meig., Macq., and the Encyc, Meéthod., 
\| Meig., Ibid. 
"| Meig., Ibid, and Macq., Dipt. du nord dela France. 
** Meig., Ibid. See Macq., Dipt du nord de la France, Tipulaires, p. 45. 
