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

RIBEIRO, H. & RAMOS, H. Cunha -- <strong>Research</strong> on the mosquitoes of Angola X
larvae the antenna is infuscated at base as well as from a little before
tuft to the tip, seta A may have as much as 8 branches, seta d is
usually single (bifid in about 15 per cent of the instances), the siphon
index is from 5.5 to 7, and both the saddle hair and the upper caudal
seta are bifid. In two full-grown larvae there is a dorsal bend of siphon
near apex, much as it is found in larvae of C. toroensis. The other larval
characters are as described by the above-cited Authors.
DISTRIBUTION AND BIOECtOLOGICAL NOTES. C. trifoliatus is an
Ethiopian species widely distributed throughout Africa South of the
Sahara, though most records refer to East African biomes. Map 16
shows the three now known Angolan records for trifoliatux, at altitudes
of about 900, 1,000 and 1,300 meters.
All the adult specimens available to the writers were reared in
the field laboratory. 2 larval biotopes were recorded, both along the
margins of mountain streams in the Scarpment Zone (Map 3). Larvae
of Anopheles implexus, Culer annulioris, C. decens, C. perfidiosus, and
C. p. piplens were recorded as associates of trifoliatus, all of them
only once.
C. trifoIiatus is not known to bite man.
7.5.30-- Culex (Culex) tritaeniorhynchus tritaeniorhynchus Giles, 1901
The only previously known Angolan record of C. tritaeniorhynchus
was that from Lobito, by one of us (13). The subspecific name is re-
corded for the first time.
MATERIAL EXAMINED. BARRA DO CUANZA, 2 9, 2 3 plus 10 larvae,
15.IV.1970; MOChAMEDES, I 9, 2 3 plus 19 larvac, 18.X.1967, 28.IV.1969 and
3.V. 1969; NOVO REDONDO, 2 plus 7 larvac, 24.XI.1969; TCHIVINGUIRO,
1 3, 29.V.1969.
TAXONOMIC NOTES AND DISTRIBUTION. It seems that the form
of C. tritaeniorhynchus occurring in Africa is the introduced type form
(type locality: Travancore, SW India) brought by human agency from
the western Indian coasts (8), possibly aldready in historical times.
In fact, no taxonomically significant differences were ever reported
114 Estud.. Ens. e Doc. -- 134