ILLUSTRATIVE OF NATURAL SELECTION. 187 
colouration. Using these characters, I divide the 
Malayan Papilios into four sections, and seventeen 
groups, as follows :— 
Genus ORNITHOPTERA. 
a. Priamus-group. 
c. Brookeanus-group. 
b. Pompeus-group. Black and yellow. 
Genus PapItio, 
A. Larve short, thick, with numerous fleshy eee as 
of a purplish colour. 
a. Nox-group. Abdominal fold in male very large; 
anal valves small, but swollen; antenne mode- 
rate; wings entire, or tailed; includes the Indian 
Philoxenus-group. 
b. Coon-group. Abdominal fold in male small; anal 
valves small, but swollen; antennz moderate; 
wings tailed. 
c. Polydorus-group. Abdominal fold in male small, 
or none; anal valves small or obsolete, hairy ; 
wings tailed or entire. 
B. Larve with third segment swollen, transversely or 
obliquely banded; pupa much bent. Imago with 
abdominal margin in male plaited, but not re- 
flexed; body weak; antennaz long; wings much 
dilated, often tailed. 
d. Ulysses-group. 
} Black and green. 
Protenor-group (Indian) is 
e. Peranthus-group. somewhat intermediate be- 
f. Memnon-group. tween these, and is nearest 
‘{ to the Nox-group. 
. Helenus-group. 
. Hrectheus-group. 
Pammon-group. 
. Demolion-group. 
C. Larve subcylindrical, variously coloured. Imago with 
abdominal margin in male plaited, but not re- 
flexed; body weak; antenna short, with a thick 
curved club; wings entire. 
Rr Bog 
