Igo AN ACCOUNT OF BRITISH FLIES. 
pale brownish—pale towards the base. Abdomen blackish, clothed 
with long, soft, pale hairs ; first joint of fore tarsus about as long as 
the tibia, 9, antennze 7-jointed, dusky first joint, thick, ferrugi- 
nous ; last longer than the three preceding together. Thorax fer- 
ruginous, with three confluent bands on the mesonotum ; ‘scutellum 
rather pitchy-reddish; mesonotum and mesosternum wale slaty- 
gray. Wings broader than in the 4, veins more evident, dusky 
ferruginous. Abdomen above, dark gray, except the incisures or (in 
immature specimens) only an interrupted dusky line down the back ; 
first joint of fore tarsus shorter than the tibia.” AHalday MSS. 
Length, 2 lin. Found by Haliday in Ireland. 
D. Typhon, Hal. 
Female ; “ Very like the preceding species ; the antennz 7-jointed. 
Pale-yellowish. Vertex, three confluent stripes on the mesonotum, 
metanotum and mesosternum, cinereous (scutellum paler). Antenne 
fuscous ; first joint ferruginous; seventh elliptical, as long as the 
three preceding or more. Wings white hyaline; usual veins fus- 
cous, yellowish towards the base ; pobrachial areolet closed beyond 
the fork of the pobrachial vein. Abdomen above cinereous, with 
pale incisures ; coxz ferruginous, outwardly cinereous. Fore-legs 
dusky; femora at the base and coxe pale-yellowish ; posterior 
femora and tibiz ferruginous, with dusky tips; fourth joint of the 
tarsi short, obcordate, notched at the tip; first joint of the fore 
tarsi very little shorter than the tibia.” id. Length, 2lin. Found 
by ed in Ireland. : 
, D. tonsus, Hal. 
The smallest of this genus, the length being from 1 to 14 tin, It 
resembles D. ammon., but the antenne are different, and the wings 
are not white. Antennz dingy yellow, half the length of thorax ; 
last joint elongate elliptical, not one-fourth of the length of the 
antennze ; second and next joints sub-globose, then gradually in- 
creasing in length, and becoming oblong, scantily verticillate, with 
very long hairs, not forming a plume as usual. Pobrachial areolet 
scarcely passing the fork of the pobrachial vein. Abdomen dusky, 
with pale band on each segment ; slightly hairy. Legs longer than in 
ammon. Found (by Haliday) in Ireland, and one near London. 
' D. notata (Staeg.) is also said to be British. 
GENUS. Bae p anypus, Mg. 
This genus is better known than any of the preceding, except 
Chironomus. The. Zazyf/ are very similar to the Chironomi in their. 
