30 
A Monograph of Culiciclae. 
'i 
The abdomen is round, with nine segments, the segments 
deeply constricted. The seventh metamere is very long, as long 
as the fifth and sixth together; the eighth is shorter, and bears 
the respiratory siphon on its upper surface. This siphon is short, 
about as long as the segment that bears it. It is pointed, 
and bears at the end a single simple pair of narrow bristles. 
The ninth has on its dorsal side a tolerably deep depression. 
There are but few fan-bristles on segments one to eight. A fan 
projects from the lower side of the ninth segment, and consists 
of more than thirty long bristles of compound structure. The 
ninth somite also bears four slender anal tubercles, with a pair of 
quite small bristles in the end. 
I know of no other description except that of Meinert’s from 
which the above has been compiled. 
Anopheles larvae (Fig. 17). — Anopheles larvae differ from 
all those previously mentioned in that they possess no long 
siphon. They, like Culex, vary to some degree in the different 
species, but chiefly in colour and minor details, as one would 
expect. 
The first good published description of Anopheles larvae is 
Meinert’s, who worked with A. macnlipennis and A. nigripes. 
Regarding A. macnlipennis the following are the chief points in 
Meinert’s description : “ Ground colour is a light grass-green or 
yellow-green, with a broad dark central dorsal stripe, white in 
the middle, with six small oblique bands and four small spots 
at the hinder border of the first abdominal segment; the head 
is yellow with numerous black spots. The young larva is 
darker and more uniform in colour. The head is smaller than 
in Culex and of a more or less oval shape; in front are six 
feathered bristles in a row, the outer one on each side being 
the largest ; there is also a single plumose bristle on each side 
in front ; the mouth has also a distinct whorl organ as in Culex. 
The eyes are large, and form a somewhat elongated curved band 
of ocelli and pigment ; the antennae are short and small and 
2-jointed, rather elongate and conical, with a row of fine bristles 
on the inner edge and a little fan-like group of bristles on the 
outside; at the apex of the joint are two long leaf-shaped 
bristles and a couple of similar shorter ones, and also two long 
ones as fine as hairs. The whorl organs are more developed than 
in Culex , but much on the same plan. The thorax is much 
broader than the head, and is sometimes broader than long, 
