8 
Cephalothorax. — There has been little 
deviation from Macfie’s classification of the 
cephalothoracic setae, probably because they 
show so little variation in position among the 
genera of mosquitoes. The setae are illustrated 
in typical positions in Figure 1, and are de- 
scribed as follows: 
Postocular ( circum-ocular of Macfie): Three 
setae located on the head shield close to the 
posterior border of the eye; 1 upper, 2 median, 
3 lower. 
Anterothoracic: Four setae located in the tri- 
angular area between the anterior margin of 
the cephalothorax and the upper border of the 
antenna as it sweeps backwards; 4 lower an- 
terior, 5 upper anterior, 6 lower posterior, 7 
upper posterior. 
Dorsal: A single seta (8) located between, a 
little behind, or far behind, the trumpets. 
Supra-alar: A single seta (9) located above the 
root of the wing. 
Metanotal ( posterothoracic of Macfie): Three 
setae located on the bridge of the metanotum: 
10 internal (o of Senevet, Baisas, and Ed- 
wards), 11 median (p of Senevet, Baisas, and 
Edwards), and 12 external (r of Senevet, Baisas, 
and Edwards). 
Abdomen. — In attempting to homologize 
the setae of anopheline, culicine, megarhinine, 
and sabethine pupae I have been able to follow 
the reasoning of Baisas (1938: 175-232) al- 
most completely for all except the dorsal setae 
of segment II. This is the most difficult seg- 
ment to fit into the scheme of the abdomen 
as a whole because of the shifting in position 
of some of the setae. Rozeboom and Knight 
(1946: 95-131) considered that the setae of 
segment II were not entirely homologous to 
those of III— VII when they stated that not all 
segments have all the setae, and Baisas (1938: 
175-232) and others apparently failed to find 
all of the setae on segment II. However, I have 
found the full complement of setae on segment 
11 and consider the differences from other seg- 
ments as of position only. 
Seta A is present as a spine or simple hair on 
PACIFIC SCIENCE, Vol. Ill, January, 1949 
segments II through VI of all mosquito pupae 
with the exception of the tribe Megarhinini, 
the pupae of which will be discussed in a sep- 
arate paper. On segment II, seta A is a minute 
simple spine or hair on the lateral margin 
usually somewhat anterior to the postero-lateral 
corner (Figs. 3, 4). With this as a starting 
point and working toward the mid-dorsal line 
of the tergite we find seven setae more or less 
near to the posterior margin, and one (seta 5) 
near the anterior margin. The larger two of the 
posterior seven, usually nearest the posterior 
margin, are designated as B and C, and the 
others a little more anterior are taken in 
sequence from lateral side to mid-dorsal line 
as setae 1, 2, 3, 4, and c' respectively. The posi- 
tion of c' varies somewhat, but it is usually a 
small, simple, more or less, spine-like seta 
placed either just laterad of, or just mesad of, B. 
There is usually no difficulty in interpreting 
the setae bn segments III to V. However, seta 
3 is represented only by its socket on these 
segments. Seta 3 is entirely absent from seg- 
ment VI, but otherwise the setae of this segment 
are similar to those of III through V. 
Segment VII presents some difficulties. Seta 
3 is entirely absent as on segment VI, and the 
larger postero-lateral seta, which is usually a 
tuft in non-anopheline pupae, is considered 
homologous to seta A of other segments. The 
other setae fall fairly easily into line. In some 
species of Aedes, seta 1 may approach the size 
and importance of A; and in Armigeres seta B 
is so reduced in size that it is difficult to as- 
sign with certainty. 
Segment VIII has only three setae dorsally. 
These are difficult to homologize with those of 
the other segments, and hence are generally 
designated simply as A, the larger postero-lateral 
tuft; A', the smaller seta mesad of A; and 5, 
apparently the same seta as in the other seg- 
ments. 
Segments IX and X have one pair of small 
setae each in only a few genera. Seta v on seg- 
ment IX is present in Uranotaenia, Aedomyia, 
and Culex only, while seta w on segment X is 
present only in Megarhinus. 
