Research on the mosquitoes of Angola - Systematic Catalog of ...

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RIBgIRO, H. & RAMOS, H. Cunha -- <strong>Research</strong> on the mosquitoes of Angola X As theileri adults, only 13 unfed females were caught, all of them in the act of biting man in the outside, from 17.30 to 18.00 hours. The agressive theileri females were caught during May and June, in the Calai area, either along the margins of the Cubango river or in the villages bordering the flood plaine. Here, however, they were never found inside human habitation. 7.5.27--Culex (Culex) toroensis Edwards & Gibbins, 1939 New record for Angola. MATERIAL IgXAM][NED. NOVA LISBOA, 6 9 plus 4 c, 31.III, 14.IV and 13.V. 1970. TAXONOMIC NOTES AND DISTRIBUTION. Our knowledge on the morphology, variation, distribution and taxonomy of the tri/ilatus sub- group (within Edwards' group B or piplens) is still a very unsatisfactory and scanty one. This seems to be particularly true in the case of the closed allied species C. toroensis and C. vansomereni and their forms, arisen during the process of speciation which took place along the discontinuous montane biomes of East and South Africa and which certainly extended also to Angolan highlands and mountains. The form found in Nova Lisboa, at 1,700 m (Map 14), is here attributed to C. toroensis as none of the specimens has prealar scales, the anterior surface of hind femur may be dark for as much as the distal "-/3, and the foliole in the male terrainalia is large, longer than seta [. The identification of these Angolan specimens with C. toroensis macrophyllus, however, is quite doubtful, as the arfical lobe of coxite is deeply divided (as in C. vansomereni vansomereni) and the hind femur may be dark for only as little as the distal 1/3. It seems that, in fact, the Angolan form should be better treated as a new subspecies of C. toroensis. Curiously enough, Mouchet et al. (77) arrived at a similar conclusion when studying macrophyllus-like material from Cameroon. BIOEOOLOGICAL NOTES. Our adult specimens of C. toroensis were reared in the field laboratory. Unfortunately, however, all the immature Estud., Ens. e Doc. -- 134 11]
RIBgIRO, H. & RAMOS, H. Cunha -- <strong>Research</strong> on the mosquitoes of Angola X material was lost. 3 breeding places of C. toroensis were recorded: a sunlit cement water-tank, a shallow earth-well and a borrow-pit, both of these well shaded biotopes. The pH of the breeding water, meas- ured in two biotopes, was 5.6 and 6.4. Larvae of C. tigripes were found as associates in all the breeding places, while the following species were recorded only once: Anopheles coustani s. str., An. cydippis, Culex argenteopunctatus kingi, C. chorleyi, C. duttoni, C. kingianus, C. p. pipiens, C. p. quinquefasciatus, C. trifilatus, and C. univittatus. The Angolan form of C. toroensis seems to be a relatively un- common zoophilic mosquito of the Humid Montane biome. 7.5.28--Culex (Culex) trifilatus trifilatus Edwards, 1914 Only C. trifilatus s. I. was known to occur in Angola, on the basis of the finding of four adult specimens (certainly females) caught by Worth & Paterson (12) at Nova Lisboa (,: Huambo). MATERIAL EXAMINED. CUI, 3 Q plus 2 ex pupa, 15.1II.1970, new locality record. Also HUAMBO (= Nova Lisboa), 2 9, 1 3 plus 47 larvae in in different instars and a pupa, 15.I11.1970 and 6-13.V.1971. T,XONOMIC NOTES. Our C. trifilatus are here identified with the nominate subspecies in view of possessing the following characteristics: apical lobe of coxite (male terminalia) with setae d and e present, as well as a stout hooked seta f; distal third to distal half of the outer (anterior) surface of hind femur dark. Larvae are also slightly different from those of ssp. aenescens and will be described in another paper. DISTRIBUTION. C. trifilatus is widely distributed throughout the Ethiopian Region, though the nominate subspecies seems to be mainly associated with East and South African highland biomes. Map 14 shows the only two Angolan localities known for C. t. trifilatus (at altitudes of 1,700 and 1,800 m). BIOEOOLOGICAL NOTES. 15 breeding places of C. t. tri/ilatus were recorded, all of them artificial containers in peridomestic habitat: old 112 Estud., Ens. e Doc.- 134
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!NTA DE INVESTIOAQOE8 IENTIFICAS DO
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ESTUDOS, ENSAIOS E DOCUMENTOS N. ø
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VOLUMES J/ PUBLICADOS NA COLEC(3,O
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36--A Entomofauta dos Produtos Arma
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75 -- Notas sobre a Criaqo de Gado
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CDU 576.895.711 (673) JUNTA DE INVE
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I --INTRODUCTION With this paper on
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4--ON THE ZOOGEOGRAPHY OF ANGOLA On
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6--KEYS TO FEMALES AND LARVAE OF TH
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7 -- SYSTEMATIC ACCOUNT Genus Culex
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