Aedes of the Philippines — Knight and Hull 
471 
Subgenus Aedes Meigen s. str. 
1818. Aedes Meigen, Syst. Beschr. 1: 13. 
Genotype: cinereus Meigen (Europe, 
North America). 
ADULT: Dark brownish or reddish species 
with little or no ornamentation, tarsi all dark. 
Palpi short in both sexes. Vertex dorsum 
mostly broad-scaled. Scutellum narrow-scaled. 
Patches of broad white scales on propleuron, 
upper and posteromedian portions of sterno- 
pleuron, and on upper part of mesepimeron. 
Paratergite not scaled. Lower mesepimeral 
bristles absent but mesepimeron often with 
fine hairs posteriorly. Legs dark. Male with 
tarsal claws of fore leg unequal or equal, both 
toothed, midlegs with claws unequal or equal 
and with all combinations of being simple 
or toothed, hind legs equal and toothed or 
simple. Lemale tarsal claws equal, toothed, 
those on hind tarsi simple in some species. 
Tergite I with white scales along lateral bor- 
der. Terminalia: Basistyle short, stout, no true 
basal lobe bearing various strikingly modi- 
fied apical and subapical structures. Disti- 
style extremely various in form, sometimes 
bearing hairs but never with a true appendage 
present. Phallosome various but always di- 
vided into a pair of plates or rods. Claspettes 
absent. Various striking processes may be de- 
veloped from the ninth or tenth segments. 
Lemale terminalia specifically modified. 
LARVA: Similar to Banksinella. Antennal 
hair tuft single or branched (2-10). Head hair 
4 with 2-7 branches; 5 single, or with 2-10; 
6 single, or with 2-8. Comb with 8-14 scales 
arranged in regular or irregular row. Siphon 
with attached acus; distal pecten teeth usually 
more widely spaced. Anal plate incomplete; 
ventral brush with 10-15 tufts, all but basal 
1-4 arising from a laterally connected barred 
area. 'Habitat a wide variety of fresh- and 
brackish-water ground pools, temporary or 
permanent. 
DISTRIBUTION: Approximately 68 species 
are now recognized in the subgenus Aedes, 
of which the majority occur in the Australa- 
sian and Oriental regions. Thirteen species 
are known from the Philippines. 
SYSTEMATICS: To date it has not been pos- 
sible to divide the known species into any 
logical system of subgroups. Lor a detailed 
treatment of the known Philippine species, 
see Laffbon (1946). 
Aedes (Aedes) robertsi Laffoon 
1946. Aedes {Aedes) robertsi Laffoon, Jour. 
Wash. Acad. Sci. 36: 230 (males, fe- 
males, larvae). Type locality: Philip- 
pines. Tacloban, Leyte (Roberts) . Type: 
Male (holotype) in Academy of Natural 
Sciences of Philadelphia. 
DISTRIBUTION: Literature records. Known 
only from type series. 
Aedes (Aedes) hamistylus Laffoon 
1946. Aedes {Aedes) hamistylus Laffoon, Jour. 
Wash. Acad. Sci. 36: 232 (males, fe- 
males, pupae, larvae). Type locality: 
Philippines. Cape Melville, Balabac 
(Laffoon). Type: Male (holotype) in 
U.S.N.M. 
DISTRIBUTION: Literature records. Known 
only from type series. 
DISCUSSION: This species is apparently in- 
distinguishable from robertsi except for the 
following characters. Male with claws of fore 
leg unequal, both toothed; claws of midleg 
unequal, the larger one simple, the smaller 
one toothed. Apical prolongation of basi- 
style more rounded than in robertsi, base of 
its inner posterior projection larger, with only 
a short blunt projection arising from it. Basi- 
style with two bristles close to outer base of 
prolongation, but with an area free of bristles 
for some distance anterior to these, a total of 
about 10 bristles on the basistyle. Lemale 
terminalia with the regions of densest sclero- 
tization in the postatrial area differing. No 
means of separating the larva from that of 
robertsi has been found. The larvae of robertsi 
and of this species are unusual in that the 
