DIPTERA. 301 
of the antennz of the Goniz. The palpi terminate in a short, but 
almost ovoid and pointed club. 
I have established this genus on two species of Diptera sent to me 
by M. Marcel de Serres, and captured by him in the environs of 
Montpellier. They are small, and furnished with a silvery down, 
which, in one, covers the whole abdomen. 
Certain species of Tachina, Meig., those, for instance, the type of 
whose wings is given in fig. 32 of pl. 41, and some of his Antho- 
myiz with large alule covering the greater portion of the halteres, 
will re-enter the last division of the Creophilz. 
In all the other Muscides of which we are about to speak, the alu- 
lz are small or almost wanting, the halteres are exposed, and the 
principal longitudinal nervures of the wings extend to the posterior 
margin, which, except in a very small number, closes the posterior 
cells, and even some others that originate near the opposite extre- 
mity. The wings,in most of them, are incumbent, one on the other. 
A second general division of the Muscides, that of the AnrHomy- 
ZIDES, is composed of species resembling common Flies, in which 
the wings are most frequently incumbent and do not vibrate, and 
where the antenn& are inserted near the front, are always shorter 
than the head, terminated by a linear palette or one forming a long 
square, longer than the preceding joint, and with the seta most 
commonly plumous. The head is hemispherical, furnished with 
hairs anteriorly, and the eyes are closely approximated or contigu- 
ous posteriorly in the males. The legs are of an ordinary size, 
and the abdomen is composed exteriorly of four annuli. 
In some, the antennz are almost as long as the face of the head, 
and the seta is plumous. 
Sometimes the abdomen of both sexes is gradually narrowed, 
and terminates in a point. 
- 
Aytuomyra, Meig.—Musca, Lin. Fab. 
Where the eyes are separated in both sexes; the proboscis does 
not terminate in the manner of a hook, or by an abrupt and very 
open angle. . 
A. pluvialis; Musca pluvialis, L. Cinereous, with black spots 
on the thorax, and nine triangular ones of the same colour on 
the abdomen. Very common in France(1). 
(1) See Meigen. 
