Research on the mosquitoes of Angola - Systematic Catalog of ...
Research on the mosquitoes of Angola - Systematic Catalog of ...
Research on the mosquitoes of Angola - Systematic Catalog of ...
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RIBEIRO, H. & RAMOS, H. Cunha -- <str<strong>on</strong>g>Research</str<strong>on</strong>g> <strong>on</strong> <strong>the</strong> <strong>mosquitoes</strong> o[ <strong>Angola</strong> X<br />
7.5.10--Culex (Culex) grahami Theobald, 1910<br />
The <strong>on</strong>ly published <strong>Angola</strong>n record <strong>of</strong> C. grahami is that by Grin-<br />
dara (10) (11), from Lobito.<br />
MATERIAL EXAMINED. CANGANDALA, 2 larvae, 15.11.1970; CANGAN-<br />
DALA, 24 km SE (road to Bembo), 2 larvae, 10.I1.1970; MALANJE, 7 larvae,<br />
1 .II. 1970.<br />
TAXON'OMIC N.OTES. Our larvae <strong>of</strong> C. grahami exhibit some n<strong>on</strong>-<br />
negligible variati<strong>on</strong>. The number <strong>of</strong> subventral tufts <strong>of</strong> siph<strong>on</strong> (always<br />
with 2-4 branches) varies from 8 to 14 (both sides toge<strong>the</strong>r), some<br />
<strong>of</strong> <strong>the</strong> specimens approaching in this respect, var. farakoensis <strong>of</strong><br />
Ham<strong>on</strong> (53). The length <strong>of</strong> <strong>the</strong>se tufts is also noticeably variable, as<br />
<strong>the</strong>y may reach in some specimens to about 2//3 diameter <strong>of</strong> siph<strong>on</strong>.<br />
Tlne most proximal <strong>of</strong> <strong>the</strong> subventral tufts are <strong>of</strong>ten inserted before<br />
<strong>the</strong> last 1-3 pec[en teeth, as figured by Hopkins (op. cit., Fig. 207) but<br />
not menti<strong>on</strong>ed in <strong>the</strong> text. Also tb, e number <strong>of</strong> comb spines may be<br />
as high as 36, though it is usually about 20. Finally, it is to be noted<br />
that <strong>the</strong> last abdominal segments, including <strong>the</strong> distal <strong>of</strong> saddle,<br />
<strong>of</strong> <strong>the</strong> <strong>Angola</strong>n larvae are obviously spiculate.<br />
DISTRIBUTION. Map 17 shows <strong>the</strong> known distributi<strong>on</strong> <strong>of</strong> C. gra-<br />
hami in <strong>Angola</strong>.<br />
BIOEOOLOGICAL N.OTES. C. grahami seems to be a ground water<br />
breeder. 2 <strong>of</strong> <strong>the</strong> larval biotopes recorded by <strong>the</strong> writers were grassy<br />
rain-water ground pools and <strong>the</strong> o<strong>the</strong>r <strong>on</strong>e c<strong>on</strong>sisted <strong>of</strong> a p<strong>on</strong>d with<br />
abundant aquatic vegetati<strong>on</strong>, including water-lilies. In <strong>on</strong>e <strong>of</strong> <strong>the</strong> ground<br />
pools, near a village, <strong>the</strong> water was dark and turbid, with high organic<br />
c<strong>on</strong>tent, but it was clean in <strong>the</strong> o<strong>the</strong>r instances.<br />
Larvae <strong>of</strong> ,4n. coustani, An. squamosus and C. weschei were found<br />
as associates in two <strong>of</strong> <strong>the</strong> biotopes, while Aedomyia africana was <strong>on</strong>ly<br />
recorded from <strong>the</strong> p<strong>on</strong>d.<br />
According to our data, C. grahami seems to be a relatively uncom-<br />
m<strong>on</strong> zoophilic mosquito in <strong>Angola</strong>. In Kenya, Someren et al. (49)<br />
reported grahami as biting man very rarely, in bush.<br />
Estud., Ens. e Dot'.- 134 81
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