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

RIBEIR0, H. & RAMOS, H. Cunha -- <strong>Research</strong> on the mosquitoes o! Angola X
25m Antenna less than half length of head; lateral seta
of saddle distinctly frayed, more than twice length
of saddle; anal papillae about 3-4 times length of
saddle; siphonal index 3 or less; subventral tufts ex-
tending to near base or siphon, at least to its basal
fifth ................................................................
--Antenna at least half length of head; lateral seta
not frayed and shorter, at most 1 times length
of saddle; anal papillae usually shorter; siphon index
usually more than 3; basal subventral tufts of siphon
more distally placed ...........................................
26 1 Antenna spiculate; comb of about 30 scales ...........
--Antenna without spicules; comb of not more than
18 scales ...........................................................
27 1 Anal papillae short and rounded, dorsal pair at most
about as long as saddle, usually less; upper caudal
seta with at least 3 branches; preclipeals short and
thick, with somewhat blunt tips ..........................
Anal papillae narrowly triangular, dorsal pair usually
longer than saddle; upper caudal seta usually with
two branches, rarely single or 3-branched; preclipeals
longer and thinner, as usual ...............................
Head setae B and C with 2 or 3 branches, respec-
tively; comb of about 30 scales; subventral tufts
of siphon placed very close to mid-ventral line ......
--Both head setae B and C with at least 4 branches;
comb with 40-60 scales; subventral tufts much more
lateral in position ..............................................
26
27
nebulosus
cinereus
thalassius
28
perfidiosus
291 Proximal two pairs of subventral tufts of siphon
with a mean number of branches per tuft of about
2.5 (1.5-3.0); siphon often with a slight sigmoidal
curvature ..................................................... pipiens pipiens
--Proximal two pairs of subventral tufts of siphon
with a mean number of branches per tuft of
Estud., Ens. e Doc.- 134 47
29