Synopsis of a hundred common non-anopheline mosquitoes of the ...
Synopsis of a hundred common non-anopheline mosquitoes of the ...
Synopsis of a hundred common non-anopheline mosquitoes of the ...
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IO<br />
sidered as <strong>the</strong> vector <strong>of</strong> filariasis in <strong>the</strong> Fiji Islands. After a careful follow up, he came<br />
to <strong>the</strong> conclusion that at best <strong>the</strong> numbers <strong>of</strong> <strong>the</strong> filaria carrier in Fiji can hardly be<br />
reduced by more than j per cent.<br />
The breeding places <strong>of</strong> Toxorhy~zcMes are usually vegetable ones, though occasionall><br />
larvae have been found in artificial breeding places.<br />
Aote. Females <strong>of</strong> Toxovhynchifes species are ra<strong>the</strong>r variable in colourational characters, Thus,<br />
closely related species and varieties are sometimes difficult to identify. Xoreover, <strong>of</strong>ten sexual<br />
differeiices exist in some species and larvae do not show strikin g characters to help in identification.<br />
Males are not so variable and are easier to recognize.<br />
Toxorhynchites splendens Wiedemann 1S19<br />
A large, beautiful mosquito with well developed lateral tufts <strong>of</strong> yellow, black and<br />
orange hairs on terminal abdominal segments and with <strong>the</strong> proboscis strongly curved<br />
downIvards and backwards in <strong>the</strong> middle, basal<br />
half rigid (Fig. 5b).<br />
ADULT. Female. Head with <strong>the</strong> scales<br />
brightly coloured: green and blue with purple<br />
reflections, a narrow pale border to <strong>the</strong> eyes;<br />
<strong>the</strong> stout basal portion <strong>of</strong> <strong>the</strong> proboscis purple<br />
or dark blue, palpi purple, about as long as first<br />
six flagellar segments <strong>of</strong> <strong>the</strong> antenna; antenna1<br />
hairs ra<strong>the</strong>r short, fine ancl sparse.<br />
z@y772<br />
I horax. Mesonotum with <strong>the</strong> scales greenish<br />
:<br />
A<br />
6<br />
a b<br />
Fig. j. Toxovlq~ucl~ites, details <strong>of</strong> adult :<br />
(17) win;; with T’-shaped thickening indicated br asterisk; (b) head <strong>of</strong> male showing curved proboscis.<br />
metallic on dorsal surface; <strong>the</strong> scales at <strong>the</strong> sides may be somewhat bluish, those on scu-<br />
tellum bluish green; afin covered with brassy scales ivith bluish reflections, or <strong>the</strong> scales<br />
are blue or green; p@z bluish above, silvery below, scales on pleura silvery. Wings with<br />
<strong>the</strong> membrane brownish, especially anteriorly; scales at base <strong>of</strong> wing deep blue or<br />
purple. Legs with front and mid-femora purple, pale golden ventrally and posteriorly,<br />
hind -pair mainly pale golden, purple dorsally on distal half; front tibia purple, with<br />
usually some pale golden scaling posteriorly, mid-legs with <strong>the</strong> tibiae mainly pale golden,<br />
purplish at base and apex; on hind pair <strong>the</strong> tibiae are purple, with greenish reflections;<br />
tarsal ;marlting T:ariable, t3-tj on front and hind tarsi dark, LI <strong>of</strong> front tarsi white, with<br />
dark basal ring and sometimes dark tip, a basal white ring on tz variable in width;<br />
ornamentation <strong>of</strong> tI-tj on mid-legs very variable: sometimes entirely white except<br />
for a dorsal dark mark at base <strong>of</strong> tI and a dark tip to t5; in some specimens <strong>the</strong> white<br />
markings reduced to a subbasal white ring on tr and a basal white ring on tz; tz <strong>of</strong> hind<br />
legs dark or with pale scaling, forming a more or less complete basal or subbasal band;