472 
PACIFIC SCIENCE, VoL VII, October, 1953 
anal papillae are extremely long and possess 
prominent tracheation. This rather unusual 
structural detail is apparently correlated with 
their ability to remain nearly indefinitely at 
the bottom. 
Aedes (Aedes) dux Dyar and Shannon 
1925. Aedes {Aides) dux Dyar and Shannon, 
Insecutor Inscitiae Menstruus 13: 81 
(male). Type locality: Philippines. 
Type: Male (holotype) in U.S.N.M. 
1928. Aedes {Aedes) sigmoides Barraud, Indian 
Jour. Med. Res. 16: 373 (female). Type 
locality: Andaman Islands. Port Blair 
(Christophers). Type: Female (holo- 
type) in B. M.j Terminalia mounted. 
1937. Aedes {Aedes) dux Dyar and Shannon. 
Causey, Amer. Jour. Hyg. 25: 414. 
Synonymy of sigmoides. 
1945. Aedes {Aedes) macrodixoa Dyar and 
Shannon. Bohart, Synopsis of Philip- 
pine Mosq., NavMed 580, p. 65 and 
figure 52 (female only). 
Adult and larva described by Laffoon (1946: 
233). 
DISTRIBUTION: Specimens examined. C.A.S, 
Mindoro: 2 females, 1 set assoc, skins, 1 larva. 
San Jose (Ross). C. C. Luzon: 19 females, 
Santo Tomas, LaUnion Prov. (Franclemont). 
Literature records. Luzon: Camp Nichols and 
Las Pinas, Rizal Prov. Tungkong Manga, San 
Jose, Bulacan Prov. Manila, Manila Prov. 
Subic Bay, Zambales Prov. Camp Stotsenberg, 
Pampanga Prov. Mindoro: Caminawit Point. 
Mindanao: Zamboanga, City of Zamboanga 
Prov. (Laffoon, 1946: 235.) 
Outside the Philippines this species is 
known from Java, Malaya, Siam, Andaman 
Islands, and Indo-China. 
DISCUSSION: Laffoon (1946: 235) ques- 
tioned the synonymy of sigmoides by Causey 
because Barraud’s original description stated 
that the type had small, lateral, pale markings 
on the abdominal tergites. However, the se- 
nior author has had the opportunity of com- 
paring Philippine specimens with the type of 
sigmoides, and there seems to be no doubt 
but that they are conspecific. Philippine spec- t 
imens show paler brown areas basolaterally | 
on some tergites, and in some specimens these : 
areas even show a grayish color as does the 
type of sigmoides. 
In general appearance dux most closely re- 
sembles rohertsi and hamistylus. However, it 
may be readily distinguished from them be- 
cause of the hind tarsal claws, which are sim- 
ple in the former and toothed in the latter two. 
Aedes (Aedes) johnsoni Laffoon 1 
1946. Aedes {Aedes) johnsoni Laffoon, Jour. | 
Wash. Acad. Sci. 36: 235 (males, fe- | 
males, pupae, larvae). Type locality: 
Philippines. Pasanonco, City of Zam- 
boanga Prov., Mindanao (Johnson). ' 
Type: Male (holotype), with associated | 
larval and pupal skins, in U.S.N.M. 
DISTRIBUTION: Literature records. Known 
only from the type series. Leyte: Tanauan. 
Mindanao: Pasanonco, San Ramon, and 
Zamboanga Prov. Basilan: Isabela. 
DISCUSSION: Aedes johnsoni, margarsen, adus- 
tus, and andamanensis (not recorded from the 
Philippines) make up a complex that is prob- 
ably either polytypic or superspecific in form. 
Aedes (Aedes) adustus Laffoon 
1946. Aedes {Aedes) adustus Laffoon, Jour. 
Wash. Acad. Sci. 36: 236 (males, fe- 
males). Type locality : Philippines. Cape 
Melville, Balabac Island (Howell). 
Type: Male (holotype) in U.S.N.M. 
DISTRIBUTION: Literature records. Known 
only from the type series. 
DISCUSSION: In the adult stage this species 
is very similar to johnsoni and margarsen, dif- 
fering only in details of the male terminalia. 
The larva is undescribed. 
A very unusual specimen was taken as a 
larva in the pool from which part of the type 
series of adustus was taken (Laffoon, 1946: 
236). It is inseparable from the male of adustus 
