130 AN ACCOUNT OF BRITISH FLIES. 
times in a straight line. Abdomen cylindrical, with large anal 
segment and small hypopygium, short ovipositor, and two strong 
lamelle. Legs long, stout, and strong. Wings longish and rounded. 
The costa passes beyond the apex of the third longitudinal. The 
upper and lower branch of the first longitudinal form together one 
transverse veinlet. The fourth longitudinal vein is forked, and the 
fork has a short petiole ; sixth longitudinal vein very short. The 
larve live in fungi and rotten wood. 
A, defecta, W\k. 
The perfect insect is black. Testaceous palpi. Antennz 16- 
jointed, sub-moniliform, a little longer than thorax. Abdomen 
testaceous at the tip. Wings nearly limpid, first longitudinal vein 
joining costa before one-third length of wing, united by a little trans- 
verse veinlet with the second longitudinal vein, at some distance 
from its tip; the second is united to the third by a veinlet, which is 
a little beyond the base of the fourth vein ; third joining the costal 
near the tip of the latter; fourth and fifth slight, the former forked 
near its base. Legs testaceous; trochanters partly black; spurs 
long ; tarsi blackish, minutely setose beneath. Length, 1 lin. 
This species seems only to be described by Walker, from whom 
this account is compiled. 
A. nitidicollis, Mg. 
Black with shiny hairs, thorax shiny ; hypopygium and lamellz of 
ovipositor yellowish ; antennz 16-jointed, brown; palpi yellowish. 
Legs testaceous ; tarsi brown ; base of legs brown. Wings brownish ; 
base and veins brown. Length, 14 lin. 
A. amena, Wiz. 
This is a yellowish species also found in England. Length, 2 lin. 
GENuUS.— Glaphyroptera, Wiz. 
Most of the species in this genus seem to have been placed in the 
old genus Zeza, and many of them are described under this head by 
Walker and Meigen. Head roundish, flat above ; proboscis short ; 
palpi 4-jointed; fourth joint very long—as long as the three 
preceding ones together. Antenne 16-jointed. Eyes oval ; ocelli 
three, in a semicircle ; central one small; lateral ones large near the 
eyes. Thorax very convex. Abdomen with seven segments, slender, 
short anal segment and small genitalia (g¢). Legs fairly thick; 
tibize with long spines. Wings generally with spots or bands. Fourth 
and fifth veins forked. | 
