X 
APPENDIX 
XV. Culex nebulosus. Nov. sp. 
(Fig. 10, PI. II) 
Head dark-brown with a pale border round the eyes. Thorax brown with tawny-brown 
scales. Abdomen dark-brown with traces of dull, grey apical lateral spots. Legs unbanded. 
$ . Head dark-brown with narrow, curved, dull golden-brown scales, numerous brown, 
upright-forked ones, and a distinct white border round the eyes, and white scales at the sides ; 
clvpeus, proboscis, palpi, antennae brown, basal joint of the latter testaceous at the base ; eyes 
black and golden. 
Thorax shiny-black, covered densely with very narrow, curved, tawny-brown scales, and 
showing two darker parallel lines on the denuded surface, numerous golden-brown and dark-brown 
bristles over the roots of the wings ; scutellum brown with very narrow, almost hair-like, pale 
scales, seven bristles to the mid lobe ; metanotum dark chestnut-brown ; pleurae brown and 
ochraceous with scanty flat white scales. 
Abdomen deep-brown, unbanded, with dull violet reflections, indistinct apical, creamy- 
white lateral spots (Fig. ioc, PI. II) ; venter grey and brown. 
Legs brown, unbanded ; coxae and trochanters ochraceous, the former with dull white 
scales ; femora dull, pale ochraceous beneath. 
Wings (Fig. iOrt, PI. II), with brown scales of typical Culex form ; first submarginal cell 
considerably longer and a little narrower than the second posterior cell, its stem less than one-third 
the length of the cell ; stem of the second posterior equal to about half the length of the cell ; 
posterior cross-vein considerably longer than the mid cross-vein, about its own length distant 
from it. 
Halteres with slightly fuscous knob and ochraceous stem. 
Length. — 3 to 3"5 mm. 
Time of capture. — April, August, September. 
Habitat.— Old Calabar. 
Observations. — Described from six specimens. A rather obscure species, with traces 
more or less distinct of pale, apical, lateral, abdominal spots, and rather marked cephalic 
ornamentation. 
XVI. Culex fatigans Wied (1828) 
{Ausscurop. Zzveiflug Ins. p. 10) 
This common mosquito also occurs in West Africa, but is only represented in the 
collection by a single ? . It does not seem common, however, in this part of Africa judging from 
the collections I have received from Bonny and the neighbourhood, but, perhaps, owing to its 
commonness, it has not been collected. Like S. fasciatus Fab. its distribution is very wide, and it 
is one of the most troublesome species, biting chiefly at night and acting as one of the Filaria 
carrying hosts. 
It closely resembles Culex pipiens L. of Europe and North America, but it can always be 
told by the stem of the first submarginal cell being relatively much longer than in C. pipiens. 
The stem in C. pipiens is never less than one-fifth the length of the cell, in C. fatigans, it is always 
more, often only one-third the length. 
