Butterflies of Mauritius and Bourbon. 44:7 
frantic combats with others of its kind. With few excep- 
tions all the other Lycznids belong to the genus Zizera 
which never fly far from the ground, and usually within a 
few inches of it. 
There is a certain amount of seasonal dimorphism 
observable, the specimens in the cold weather having a 
more or less well-marked submarginal band on the under- 
side of the hind-wing, pale grey or whitish. It is probably 
abundant wherever the food-plant occurs. I found it at 
Blue Bay commonly, at Morne Brabant in the extreme 
south-west of the island also commonly, and it occurs also 
at Flacq on the north-east coast. It is never found above 
the seacoast. 
The female lays her eggs during the hottest hours of the day on 
the under surface of the young leaves of Cexsalpinia bonducella, 
called Cadoque by the natives. The egg is of the usual Lycenid 
shape, but flatter, pale green. The larva when first hatched is 
uniform greenish-white, head black, under a lens the body is seen 
to be covered with white hairs. During the day it rests concealed 
beneath the leaves of the food plant. When half-grown it is pale 
apple-green with a yellowish line on either side of dorsum and a 
spiracular line of the same colour. Full fed length 10 mm. varies 
from pale green to brownish-green with a pink tinge. On either 
side of the dorsum, which is darker than the ground colour, is 
a pale pink line and a spiracular line of the same colour; each 
segment is further marked by short diagonal lines rather darker 
than the ground colour. Legs same colour as the body, which 
under a lens is seen to be covered with white hairs five-rayed. 
Head black. 
Pupa pale greyish-purple with narrow purple dorsal line and 
a broader but shorter line on either side most prominent on the 
last two segments; two deep purple circular spots in line with these 
at the base of the wing covers, and two other much smaller spots 
on either side between them and the head. Ale pale green. 
Egg hatched, 26. viii; pupa, 14. ix; imago, 24. ix, ’05. 
The butterfly probably flies all the year round. 
Catopsilia florella, Fabr. 
2. Callidryas Florella, Fabr. 
3. Callidryas Rhadia, Boisd. 
Introduced into Mauritius probably with the food plant 
TRANS. ENT. SOC. LOND. 1907.—ParT Iv. (FEB.’08.) 30 
