298 
A Monograph of Culicidae. 
narrower than the second posterior cell. Halteres all pale 
ochraceous; a dusky spot at the base of the wing. 
Length —of 9 4 to 4 • 8 mm. 
Habitat .—Europe generally. 
Observations .—This species is very like C. plumicornis, but the 
posterior cross-vein is always level with the mid cross-vein, not 
distant from it as in that species. The thorax has also chestnut- 
brown colour surrounding the four dark lines, the whole forming 
a broad Y-shaped dark mesothoracic mass with the apex of the Y 
pointing forwards. 
7. Corethra fusca. Staeger (1839). 
(Naturk. Tijdskr. Bd. ii. p. 556.) 
(Fig. 130, PI. XXXIII.) 
Thorax dusky-grey, with a median dark line and broad con¬ 
verging, lateral lines on each side and two dark patches on the basal 
half of the mesonotum. Abdomen dark brown, rather paler at 
the bases of the segments ; densely hairy. Legs dull ochraceous. 
£. Head brown; rostrum and palpi brown, with dense 
long brown hairs ; antennae brown, slightly ferruginous towards 
the base, with dark brown bands ; plumes flaxen-brown. 
Thorax with dusky-grey sheen, with a narrow median dark 
line and a broad converging lateral line on each side, curved 
down in front; two dark patches outside on the basal half of 
the mesonotum; sides of the thorax in front reddish-brown, 
with pale hairs; scutellum paler, ferruginous; metanotum 
black; pleurae pale brown and black. 
Abdomen dark brown, the bases of the segments rather 
ferruginous, in certain lights catching the rays so as to appear 
irregularly white banded ; densely hairy ; venter brown, with 
paler basal bands. 
Legs pale ochraceous, densely hairy, the apical tarsi rather 
darker ; ungues equal and simple. 
Wings with the veins pale brown, with rather long pale 
brown scales ; first sub-marginal cell longer and narrower than 
the second posterior cell, its base a little nearer the base of the 
wing than that of the second posterior cell; posterior cross-vein 
longer than the mid cross-vein, only a short distance nearer the 
base of the wing. Halteres pale. 
Length. —5’5 mm. 
