188 AN ACCOUNT OF BRITISH FLIES. 
M. fuscipes, Mg. 
Black, rather shiny; anal segment broader than the preceding 
ones; the male forceps small, thick. Palpi and antennz black. 
Legs black to reddish-brown. Metatarsus of the anterior legs shorter 
than the tibize. Wings slightly brownish-gray, pubescent, hairs dark. 
Length, 14 to 2 lin. 
M. expalpans, Wik. 
Very pale brown, almost white. Head, palpi, and antennz 
blackish-brown. Thorax with three dark brown stripes. Abdomen 
with a brown band on each segment at the anterior edge. Wings 
gray, pubescent; veins testaceous. Legs pale testaceous, pubescent, 
long ; tips of the joints dark. Length, 2 to 24 lin. 
M. nugax, Wik. 
“Fawn-colour. Wings limpid, pubescent; transverse veinlet 
black ; costal, radial, and cubital veins pale testaceous, rest white. 
Halteres white. Abdomen whitish, pubescent; sutures of segments 
brown. Legs whitish, pubescent. Length, 24 lin.” (Walker). Rare. 
The following are also described : 
Whitish testaceous, Thorax with three reddish 
MM. interseptus, Wik. ...4 confluent stripes. Metathorax reddish. Legs ~ 
| pale testaceous. Length, 2 lin. (9). 
M. impensus, Wk. (?) ___f Black. Abdomen reddish. Legs testaceous, 
short and stout. Length, # lin. (9). 
Pale testaceous. Thorax with three black stripes. 
M. modestus, Mg. (?)... Veins all white. Abdomen brown. Tarsi and 
tips of joints of legs brown. Length, 1 lin. (¢). 
( Pale testaceous. Thorax with three reddish 
stripes. Abdomen with two brown bands 
+ before the middle and the three apical seg- 
ments black. Legs whitish. Length, 2 lin. 
Light grass-green. Three ferruginous stripes on 
thorax ; dusky at the tip. Wings naked ; veins 
. yellowish. Antenne 12-jointed in ¢, yellow; 
M. Tacmsteis, Hales sie) 40 «5 Seen tay laa joint dusky. Length, 2 1in: 
(go), 14 lin. (2). Found by Haliday by Loch 
Fad (Bute), Lough Neagh, and Lough Dirg. 
MM. divisus, Wik. 
Genus.—Diamesa, Mg. = Chironomus, Wik. pt. 
Antenne of the 2 7-jointed, the joints round, the last joint 
cylindrical. Antenne of ¢ plumose in all but fonsus. Eyes oval 
and on the side of the head. The form of the eyes and veins of 
_the wings resemble Zanygus. There is a closed basal areolet 
(pobrachial) as in Zanypus. But in Zanypus the g and 9 have 
15-jointed antenne. The fourth tarsal joint is notched at the tip. 
Pl. iv., fig. 4. 
