214 
PACIFIC SCIENCE, Vol. V, July, 1951 
Hakansson, MC, USN, for the initiation of 
this project, and to Captain C. F. Behrens, 
MC, USN, and Captain A. R. Behnke, MC, 
USN, for their continuing support of the 
work. The senior author wishes to express 
his sincere appreciation to Captain J. J. 
Sapero, MC, USN, for permission to com- 
plete this work after coming to his command 
at U. S. Naval Medical Research Unit No. 3. 
For the invaluable privilege of examining 
material we wish to thank the following: Dr. 
Alan Stone, National Museum; Dr. H. R. 
Roberts, Academy of Natural Sciences of 
Philadelphia; Dr. E. S. Ross, California 
Academy of Sciences; Mr. F. E. Baisas, 
Philippine Bureau of Health; Mr. H. Oldroyd, 
British Museum (Natural History); and Dr. 
Robert Matheson, Cornell University. 
Portions of this work were done in space 
provided at the National Museum and at the 
British Museum through the courtesy of Dr. 
E. A. Chapin and Mr. N. D. Riley, respec- 
tively. 
KEYS TO THE PHILIPPINE SPECIES OF Aedes 
Adult Key 
1. Tarsi all dark 2 
At least the hind tarsi with pale mark- 
ings 30 
2. Scutellar scales narrow 3 
Scutellar scales broad, or mostly so. . 17 
3- Vertex dorsum, scutum, and scutel- 
lum with conspicuous yellow 
scaling 4 
Vertex dorsum, scutum, and scutel- 
lum largely dark-scaled, not with 
yellow scaling (Aedes) 5 
4. Scutum with a broad area of yellow 
scales along lateral margin, central 
portion dark-scaled; wing with pale 
scaling along vein 1 to junction 
with stem of vein 2, on vein 5, and, 
in female, also on Sc 
(Banksinelld) lineatopennis 
Scutum with narrow longitudinal 
medial and lateral lines of yellow 
scaling; wing dark-scaled 
id Aedimorphus) ostentatio 
5. Abdominal tergites II-VIII always 
with some white or yellowish baso- 
lateral markings, sometimes pro- 
duced onto dorsum or sometimes 
reduced to only a few scales; (hind 
claws simple) 6 
Abdominal tergites II-VIII entirely 
brown (in dux sometimes with 
lateral border grayish or sometimes 
with an indefinite baso-lateral patch 
of paler brown scales on last few 
only) ; (mesepimeron never with 
more than 4 hairs behind scale 
patch, none below; about 5-10 
small upright- forked scales on nape 
on either side of mid-line; about 
10-12 verticillate bristles on most 
antennal segments of male) 15 
6. Anterior median portion of sterno- 
pleuron with 6 or more fine hairs; 
(sternites almost entirely white) . . 7 
Anterior median portion of sterno- 
pleuron bare of hairs or with only 
1-2 (rarely up to about 8 very small 
hairs in hutleri but this species with 
a considerable portion of the ster- 
nites brown-scaled and the scutal 
integument blackish-brown) 9 
7. Male ninth tergite with a very large 
median Y-shaped process about as 
long as basistyle, each branch with 
an additional hairy branch on its 
sternal surface; female terminalia 
with atrial hairs confined to median 
area, preatrial plates not united . . . 
(Aedes) macrodixoa 
Male ninth tergite without such a pro- 
cess; female terminalia with atrial 
hairs not confined to median area 
and preatrial plates united for great- 
er part of their length (female of 
nuhicolus unknown) 8 
8. Basistyle with a group of about 8-9 
stout spines apically on the inner 
sternal margin; paraproct short; 
two very long processes arising near 
apex of basistyle, one with 3-4 stout 
spines near tip (Aedes) uncus 
Inner sternal margin of basistyle with- 
out a group of stout spines; para- 
proct longer than basistyle; a broad 
