282 INSECTA. 
Crratopnya, Wied. 
Scutellum unarmed; third joint of the antenne nearly twice the 
length of the first(1). 
Apuritis, Lat.—Mulio, Fab.—Microdon, Meig. 
Where the scutellum presents two teeth; the first joint of the an- 
tenn is almost as long as the two following ones taken together. 
In this and the preceding subgenus, as in Ascia, the two first 
closed cells of the posterior edge are terminated in the manner of an 
angle(2). 
The antennz of the following Syrphidz are shorter than the head. 
The posterior legs are often large, particularly in one of the sexes. 
Sometimes the pallet of the antenne is oblong and almost in the 
form of an elongated triangle. The posterior thighs are thick and 
dentated. The wings are incumbent, one on the other. 
Meropon, Meig. Fab.—Milesia, Eristalis, Lat.—Syrphus, Fab. 
Where the abdomen is triangular or conical, without being nar- 
rowed at base, and where the external cell of the posterior edge of 
the wings is deeply emarginated exteriorly. 
M. narcissi; Eristalis narcissi, Fab.; Réaum., Insect. 1V,xxx. 
Obscure-bronze, but covered with fulvous down; legs black; 
inner side of the posterior legs tuberculous. 
The larva feeds on the interior of the bulb of the Narciss- 
us(3). - 
Ascia, Meg. Meig. 
Where the abdomen is narrowed at base and clavate. The two 
first closed cells of the posterior edge of the wings’ terminate in an 
angle; the exterior side of the first is straight(4). 
(1) Wied., Anal., Entom., fig. 9. 
(2) See Lat., Gener. Crust. et Insect., IV, 329, Meig. and Fallen. 
(3) See Meigen. 
(4) Idem. 
