— 146 — 
is not this species. His name is considered by many entomologists 
to be correct on account of the fact that in 1789 VILLIERS described 
a Culex fasciatus. No type of this exists and the description is far 
too vague, as far as I can see, for any one to identify an insect 
from it. In fact no one has attempted to use the name for VILLIERS's 
insect as far as I am aware. 
In 1804 MEIGEN described a Culex fasciatus which is undoubt- 
edly only Culicada nemorosa MEIGEN 1818, and it may thus be 
said that that name should be adopted for nemorosus (1818), and so 
in any case our yellow fever carrier cannot be called fasciata, but 
prior to this he had described thesame insect as Culex reptans (1804). 
Personally I do not feel at all sure that MEIGEN’s calopus does 
refer to this insect, and think FICALBI was quite right in separat- 
ing his elegans from it, because MEIGEN says the thorax of 
calopus was marked with dark lines. If it is not calopus, then 
DEsvorpy’s name frater (1827) would be correct instead of 
fasciata. 
However, as long as the insect is known and can be identified, it 
does not matter whether we call it calopus, frater or fasciata for 
practical purposes. 
VARIATION. — This Mosquito is subject to much variation, 
which one would naturally expect when we consider its wide range 
and its great abundance. 
In Bonny and Old Calabar many specimens show the abdominal 
banding, which is normally basal, involving both sides of the 
segments. Similar variations also occur in Australia. I described 
this variety from Brisbane, Queensland, as var. Queenslandensis 
(vide p. 19). Now and again this form becomes almost entirely 
covered on the abdomen with creamy scales. There is also some 
variation in the leg banding. One marked variety Zuciensis THEOB. 
has the tip of the last hind tarsal black. This variety occurs in the 
West Indies, Brazil, and British Guiana, and I have seen it from 
India. 
In rarer cases the median thoracic lines are absent. This is 
ARRIBALZAGA's Culex mosquito (1891). These well marked 
varieties Of the yellow fever carrier are referred to later. 
In one lot I hatched in England the variety mosquito occurred 
from the same batch of eggs with typical specimens. There is also 
some variation in size and colour of the thoracic scales, in queens- 
