76 A Monograph of Culicidae. 
see any real difference from costalis, and am obliged to sink it 
also as a synonym. At least it varies no more from the 
type than any others sent in any one series from the West 
Coast. 
PYRETOPHORUS COSTALIS. 
Variety melas. 
Thorax dark brown to almost black, with narrow-curved pale 
golden scales as in the type; palpi with four pale bands, very 
narrow, the fourth on the apex of the palpi, very scaly at their 
bases ; the two apical bands are close together, but quite distinct. 
Abdomen deep black, with pale hairs, golden at the apex. Legs 
prominently black, spotted and banded, fore legs with a trace 
of pale spots in the femora as in the type, pale spots on the 
tibiae and a narrow pale band-like spot on the metatarsi, a 
yellow band involving both sides of the joints at the metatarsus 
and first tarsal and at the first tarsal and second tarsal ; in the 
mid legs the tibiae are spotted, but the tarsal banding is not 
distinct, nor are the tarsi banded in the hind legs, and the tibial 
and femoral spots are not so well defined. 
Wings with black and yellow scaled areas, the former 
predominating ; the costa is deep black, the second spot only 
appearing on the costa as a small almost white spot, there are 
also two small pale spots on the costa towards the base of the 
wing ; on the first long vein are six pale spots, one under the 
white costal spot, the others arranged much as in the type, but 
the black areas more pronounced ; the greater part of the third 
long vein is pale, and the second mostly dark scaled, except ‘for 
the pale patch at the base of the fork and a pale patch towards 
the apex of its lower branch ; most of the fourth dark scaled, the 
lower branch of the fork having two pale patches; the fifth 
mostly pale scaled, but with three dark patches on the upper 
branch, and a small one at the apex, and another at the base 
of the lower and on its stem; sixth with three black spots ; 
fringe spots very indistinct. Fork-cells and cross-veins as in 
the type. 
Length.—5 mm. 
Habitat.—Gambia (Dutton). 
Time of capture.—-December. 
Observations.—Described from a single perfect 9. It forms 
a very distinct melanic variety. Its chief difference from a 
typical costalis is the absence of pale costal spots, one only 
