314 
PACIFIC SCIENCE, VoL -VII, July, 1953 
represents 75 per cent or more of the total 
frequencies observed. In dendritic hairs with 
15 or more branches the figures are only ap- 
proximate, as the branching varies greatly and 
is difficult to observe accurately. 
The illustrations are semidiagrammatic in 
nature, prepared with the aid of an ocular 
reticule, and are composites to show the 
"usuaE’ condition, an approximation of the 
mode, on the basis of the observations and 
measurements of the individually reared mate- 
rial. The figures of the female thorax leave 
out all detail of the mesonotum, except scale 
pattern, and are very inaccurate in the outline 
of the head as they were drawn from pinned 
specimens. In the male genitalia the anal seg- 
ment has been left out completely as it shows 
no useful characters, being apparently com- 
pletely unsclerotized. In the details of the legs 
only pertinent features are indicated. The out- 
lines of the unsclerotized portions of the larval 
thorax and abdomen are only approximate, 
whereas those of the larval head and terminal 
abdominal segments and pupal structures are 
somewhat more accurate. All elements of 
chaetotaxy are shown in as accurate propor- 
tions as could be determined. 
Acknowledgments 
In addition to the individuals mentioned 
in the first paper of this series, the following 
have been of great assistance to me in the 
various phases of this work: F. E. Baisas of 
the Department of Health, Manila; Graham 
Held, William A. McDonald, and Roy Pence 
of the University of California at Los Angeles. 
Abbreviations 
ADULTS. The standard abbreviations used 
by Edwards (1941: 7-9) for the thorax and 
those used by Matheson (1944: 12-17) for 
the male genitalia are followed. The leg seg- 
ments are designated by a combination of a 
Roman numeral with an abbreviation of the 
segment as follows: I C (prothoracic coxa), 
II TR (mesothoracic trochanter), III F (meta- 
thoracic femur), I Tib (prothoracic tibia), 
II Tar (mesothoracic tarsus), III CL (meta- 
thoracic pretarsal claw). In the case of the 
tarsus an Arabic numeral is appended to in- 
dicate the subsegment as in: III Tar 1 (prox- 
imal segment of metathoracic tarsus), II Tar 
5 (distal segment of mesothoracic tarsus). 
The measurements of the leg segments are 
given in comparative figures, using the fore 
tibia as the basic unit. 
IMMATURES. The following abbreviations 
for body regions and special features are used: 
A—antenna 
C— head (larva), cephalothorax (pupa) 
CS— comb scale 
G — genital lobe 
M — mesothorax 
MT — marginal teeth of anal saddle 
P— prothorax 
PD — paddle 
PT—pecten tooth 
S — siphon 
T--metathorax 
I-VIII — segments of abdomen 
IX — '*anal flap” of pupa 
X— segments X-XII 
The individual elements of the chaetotaxy 
are indicated by prefixing the number of the 
hair to the abbreviation for the segment or 
structure as in: 1-C (head hair No. 1), 6-II 
(hair 6 on abdominal segment II), 5-IV-VI 
(hair 5 on abdominal segments IV, V, and 
VI), 3-5-II (hairs 3, 4, and 5 on abdominal 
segment II), 2, 4-1 V, VI (hairs 2 and 4 on 
abdominal segments IV and VI). 
The type of branching is abbreviated thus: 
b (branched) when the branches arise at or 
near base; f (forked) when the branching takes 
place at or beyond the middle of the hair; 
d (dendritic) when the branching is secondari- 
ly dichotomous or irregularly dendritic. 
GENERAL CONSIDERATIONS 
Genus Uranotaenia 
1891. Uranotaenia Lynch Arribalzaga, La Pla- 
ta. Univ. Museo La Plata, Rev. 1: 375, 
2: 163-164. Type species: Uranotaenia 
