256 KF. W. EDWARDS—THE AFRICAN 
mid-scutellar bristles, as usual, is variable in this species, and as a matter of fact 
there are only 6, not 8, in the type of C. eénerea. I cannot help thinking, how- 
ever, that the 4 described as C. nigrochactac was in reality Taentorhynchus 
metallicus. Culex invenustus is probably the same species, but as I have not seen 
the type I have used the name nebulosa, which was published a page later in the 
same paper as C, invenustus. C. invenustus is said to have the thorax covered 
with flat scales (a character which is not found in any Culex I have seen), and to 
have the fore and mid femora swollen. If the former statement is an error, and 
the latter simply due to the femora having become flattened (a frequent 
occurrence), there cannot be much doubt that the specimen described as C, 
wnvenusius was a C. nebulosa var. pscudocinerea. 
C. nebulosa appears to be one of the commonest of the CULICIDAE in West 
Africa, and extends into the Congo Free State, Uganda and Mashonaland. 
Genus CuLEX, Linn. 
Syst. Nat. Ed. X (1758). 
Culex, as now restricted, is one of the easiest genera to recognise in the male, 
but the females are sometimes not easily distinguished from those of Taeniorhyn- 
chus, etc. The genus includes only those species whose males have palpi and 
ungues similar in structure to those of C. pipiens. The mere upward curvature 
of the palpi may not be considered of importance, but as far as the writer has 
seen it seems to be perfectly constant, and when once understood forms the 
easiest character by which to distinguish a species of true Culex from one 
belonging to an allied genus. The structure and form of the ¢ palpi will be 
understood by a glance at the figure of C. quasigelidus 3 (p. 258). The genus Culex, 
in this sense, includes Lutzia, Theo., Aporoculex, Theo., Leucomyia, Theo. (except 
L. scapularis), Melanoconion, Theo., Heptaphlebomyia, Theo., Pseudoheptaphle- 
bomyta, Ventr., and some species of Lacniorhynchus, Theo. (7. tenax and T. ager), 
of Grabhamia (G. jamaicens’s, ete), of Culicada (C. quasimodesta and C, bicolor) 
and of Culicelsa (C. aceraens’s and C. annulirostris) besides some small genera, 
such as Lasioconops and Oculeomyia, which were only founded on misconceptions : as 
regards the last named, contiguous eyes are found in nearly all the CULICALES, and 
I believe in most of the MnranoTorricua with the exception of Eretmapodites. 
1. Proboscis and tarsi with pale bands, those on tarsi including both 
sides of joints (fig. 4, a)... a Aa a att a 2. 
Proboscis and tarsi unbanded we a Os jt ts 
2. Thorax with pale seales on the anterior two-thirds, or at least 
with a transverse pale band behind the middle (Leucomyia, Theo.) 
(Gigrd:va)\ +0)s, ttey Roel wea ee 
Thorax with almost uniform scales, “ most with a pair of pale 
spots, abdominal segments with complete basal white bands ... 5. 
3. Femora and tibiae with rows of sharply defined whitish spots 
(figs es ia oad bg ni on 1, quasigelidus. 
Femora and tibiae not spotted 1 ne tik vat sae 4. 
4, Abdomen almost unicolorous dark brown ... 8 i wee 2. consimilis. 
Adominal segments with both median basal and lateral apical 
triangular pale spots 2% Hs Faye ids 13, annulioris. 
