40 
PACIFIC SCIENCE, Vol. Ill, January, 1949 
Segment VIII: A medium, stout, three-branched; 
A' small, simple or two-forked near apex. 
Segment IX: v small, simple spine. 
Paddle: Roughly triangular, narrow basally with 
apex expanded; midrib strong basally, fading at 
apical one-third into an oval area of light-brown 
pigment; terminal seta very long, simple, slightly 
plumose; accessory seta absent. 
Specimens examined. — The pupal exuviae 
of ten males and ten females from Caminawit 
Point (near San Jose), Mindoro Island, Philip- 
pine Islands, collected by the writer. 
Genus AEDES Meigen 
Diagnosis. — According to Edwards (1941: 
384) no single feature has been found which 
will separate all pupae of Aedes from all others, 
but most species of the genus have the follow- 
ing features in common: Trumpets short, with- 
out definite tracheoid portion except in the 
subgenus Mucidus. Float-hairs always well de- 
veloped and normally dendritic. Seta A on II-VI 
usually minute; A-VII not forming a conspicu- 
ous tuft; A-VII and A- VIII very near to corners 
of segments. Paddles with terminal seta only, 
no accessory seta. 
It is more satisfactory to treat the species of 
Aedes strictly by subgenera because of the diver- 
gences of the genus as a whole. 
Subgenus Mucidus Theobald 
Diagnosis. — In New Guinea the two species 
known in the pupal stage differ markedly in 
the length of the trumpet, and, in contrast to 
all other Aedes , have a rather definite tracheoid 
area. Otherwise, except for its large size, the 
pupal stage of Mucidus is not particularly out- 
standing although the great distance between 
setae C-II and B-II holds promise of being 
unique. 
Key to Species of Aedes ( Mucidus ) 
Trumpet moderately long with straight sides, 
total length not over five times greatest 
diameter of meatus; tracheoid area restrict- 
ed to basal one-fifth of trumpet (Figs. 25, 
26) A. alternans 
Trumpet about ten times as long as greatest 
diameter of meatus; tracheoid area occupy- 
ing at least basal one-third of trumpet 
(Figs. 27, 28) A. aurantius sspp. 
Fig. 25. Aedes alternans: pupal trumpet of female 
from Brisbane, Australia. 
Aedes (Mucidus) alternans (Westwood) 
1835 
Figs. 25, 26 
Pupa not described, but figures of the paddles 
and trumpet of specimens from North Queens- 
land, Australia, were included by Hill (1925: 
70). The figures and diagnosis included here 
are based on a single denuded specimen from 
Brisbane, Australia, collected by Mr. F. A. Per- 
kins of the University of Queensland. 
Diagnosis. — Readily separated from A. au- 
rantius sspp. by the trumpet, which is mod- 
erately long with straight sides; total length 
about five times greatest diameter of the meatus; 
tracheoid area with almost complete rings, 
Fig. 26. Aedes alternans: dorsal aspect of terminal 
abdominal segments of female from Brisbane, Aus- 
tralia. 
