Three New Species of Aedes from the Philippines 
(Diptera, Culicidae)^ 
Kenneth L. Knight and 
William B. Hull^ 
This is the tenth paper of a series prepared 
by U. S. Naval personnel on mosquito col- 
lections made in the Philippine Islands under 
the auspices of Naval Medical Research Unit 
No. 2, and completes the description of the 
new Aedes species contained in that collection. 
Aedes (Geoskusea) baisasi n. sp. 
Fig. 1 
Adult: 
MALE. Wing length approximately 2.5- 
3.0 mm. Head: Proboscis slightly longer than 
the fore femur, all dark-scaled. Palpus ap- 
proximately 0.6-0. 7 as long as the proboscis, 
exclusive of the labellum; dark; a very few 
stiff setae at the apices of the distal three seg- 
ments and a few short hairs along the last 
segment. Vertex dorsally with broad dark 
scales, appearing paler along the eye margin, 
laterally with broad pale scales, usually a line 
of broad pale scales on the nape; an irregular 
line of dark upright-forked scales along the 
dorsal anterior margin of vertex, a patch of 
similar scales along the nape. Thorax: Scutal 
integument dark reddish-brown; clothed with 
narrow brown scales. Scutellum with a small 
patch of broad dark scales on the mid lobe, 
^The opinions or conclusions contained herein are 
those of the authors and are hot to be construed as 
official or reflecting the views of the Navy Department 
or of the naval service at large. Manuscript received 
November 27, 1950. 
^Naval Medical Research Institute, Bethesda, Mary- 
land. Lieutenant Commander, MSC, USN, now with 
Naval Medical Research Unit No. 3, Cairo, Egypt; and 
Lieutenant, MSC, USN, respectively. 
a very few narrow and broad dark scales on 
the lateral lobes. Apn bare of scales; ppn bare 
or with a few narrow and broadened dark 
scales dorsally, 2-4 posterior bristles, a few 
fine brownish hairs present ventrally. Pro- 
pleuron bare. Sternopleuron with a dorsal 
patch of broad translucent brownish-white 
scales, these usually extending ventrally 
along the posterior margin, a considerable 
number of very fine short brownish hairs 
scattered over the remainder of the surface. 
Mesepimeron with a patch of broad trans- 
lucent brownish-white scales, this patch be- 
ing confluent ventrally with the dorsal hair 
tuft, a number of short brownish hairs pres- 
ent below the scale patch. Meteusternum 
(metanotum) with some fine pale hairs. Some 
of the pleural sclerites reddish-brown and 
markedly delimited by paler margins. Legs: 
Brown. The distal portion of the hind tibia 
and the basal portion of the first hind tarsal 
segment with outstanding narrow elongate 
scales on the inner surface. Fore tarsal claws 
unequal, large claw with one median and one 
basal tooth; small claw with a single subbasal 
tooth. Mid tarsal claws unequal, each with 
one subbasal tooth. Hind tarsal claws equal, 
simple. Wings: Brown-scaled. Halter stem 
pale, knob darker and with dusky scales. 
Abdomen: Tergites dark -scaled, lateral margin 
of I unsealed, a small baso-lateral pale scale 
patch on II-VII. Sternites pale-scaled basally, 
dark-scaled apically. Genitalia: Basal lobe of 
basistyle with sclerotized portion detached 
from basistyle tergally, many short thickened 
whip-like setae along mesal surface and with 
[ 197 } 
