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

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RIBEIRO, H. & RAMOS, I-[. Cunha -- <strong>Research</strong> o. the nosquitoes of Angola -- X DISTRIBUTION AND BIOEOOLOGICAL NOTES. Map 16 shows the only Angolan locality known for C. periuscus. The unfed female was caught resting inside a tent of our camp near the hospital of the town. In Kenya, C. per/uscus is also a relatively rare mosquito which, however, may bite man rarely (49). In Uganda, Haddow et al. (35) have reported perfuscus as not biting man. 7.5.18- Culex (Culex) pipiens pipiens Linnaeus, 1758 Though our data on the Angolan members of the piplens complex are not in fayour of a subspecific treatment (see also under quinquefasciatus), we maintain the nomenclature of Stone, Knight & Stareke (17) and Knight & Stone (23) considering the need for a world-wide revision of the systematics of the complex, not carried out in the present paper. C. p. piplens was firsfly recorded from Angola (Bi6) by Theobald (6) in 1907, as Heptaphlebomyia simplex males (Wellman coll.). Other published locality records are those by Gfindara (10) (11), from Huambo (8, 9) and Capelongo (9, L), and by Ribeiro & Mexia (34), from Lobito (8, L). MATERIAL EXAMINED. ALTO CATUMBELA, 1 larva, 17.IX.1970; BO- COIO, 1 larva, 9.IX.1970; CALAI, 2 9, 6 8, 29 larvae, 15-16.V. 1965; CHAO DA CHELA, 1 larva, 29.V.1969; CUANGAR, 8 larvae, 4.V. 1966; CUBAL, 10 9, 8 8, 5 larvae, 12-14.X.1970; DALA TANDO, 1 9, 1 8, 10 larvae, 27.VIII. 1969; EBANGA, 2 8, 4 larvae, 18-19.X. 1970; FOZ DO CUNENE, 1 9, 30 larvae, 22.V.1969; GUNGO, 1 8, 5 larvae, 22-23.XI. 1969; LUINGA, 1 larva, 1.X.1969; MO(AMEDES, 31 9, 36 8,218 larvae, several dates 1967-1969; M'PUPA, 2 larvae, 9.V. 1966; TCHIVINGUIRO, 1 larva, 29.V. 1969; UIGE, 2 larvae, 25.IX. 1969, all new locality records. Also HUAMBO, 15 9, 49 8, 64 larvae, several dates 1964- 1971. TAXONOMIC NOTES. A general taxonomic discussion on the piplens complex in Angola will be carried out under C. p. quinque[asciatus. The phallosome of the Angolan pipiens sensu stricto is quite typical. The inner divisions are stout, strongly divergent, with truncate, striated tips. The inner parts of the outer divisions are narrow, subparallel for most of their lengths, distally bent at almost right angles and short, their points do not reaching to the outer margins of the inner divisions. The Estud., Ens. e Doc.- 134 89
RIBgIRO, H. & RAMOS, H. Cunha -- <strong>Research</strong> on the mosquitoes of Angola -- X DV/D ratio (64), SO, seems to be usually negative, this being the case for all the apparently undistorted mounts measured by the writers fol- lowing Barr's method (65). In all pipiens females associated with males, the ratio of the length of the upper fork cell to that of its stem ranged from 3.9 to 5.0 (mean 4.4). This ratio was shown to be a satisfactory criterium for separating the females of the two forms () of the piplens complex thought to occur in Angola. The scaling of the venter, giving less constant results, was abandoned. The larvae associated with pipiens males were also examined in search for reliable morphological diagnostic characters, according to the suggestions given by Knight (67). The subdorsal abdominal hair of segments hi-IV was always double in our piplens larvae. However, as this hair was also often branched in the larvae associated with quinquefasciatus males, this character was abandoned as it is not diagnostic. In that concerns the siphon index, it is clear that in the Angolan material the highest values correspond to pipiens s. str. The usual marked variation of this index, however, makes it a non-reliable diagnostic character, much overlap being observed. The same is true, and even in a greater extent, in that concerns the length of the anal papillae or the number of the pecten teeth, though this one is usually smaller in pipiens. As to the shape of the larval siphon, the sigmoidal curvature is often marked in pipiens, but it is usually too an elusive character to be relied upon. The only valuable diagnostic character in Angolan larvae was found in the branching of the siphonal tufts. The investigation of this character was also suggested by Knight, though being presented as one > (op. cit.). After the examination of many thousands of pipiens and quinquefasciatus larvae, it became obvious to the writers that the last form has a greater branching of the siphonal tufts than has pipiens. However, this character is of diagnostic value only if one ignores the distal tufts (the branching of which does not differ significantly in both forms) and takes into account only the two most (D The term is used in the sense of Knight & Malek (66) and others, that is, to designate each of the components of the (pipiens) complex regardless of its questionable taxonomic status. 90 E.vtud., Ens. e l)oc.- 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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Page 128: ACKNOWLEDGEMENTS The writers are gr
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