302 SPOLIA ZEYLANICA. 
Tf both sexes emerge on the same evening in the breeding cage, 
they couple as soon as the wings harden, though in the one 
case on which this occurred with me the pair were still in 
copulation at 7 A.M. next morning. In copulation the male 
alights on the back of the female, after flying round her for 
from only a few seconds to 5 minutes, and then, conjoining 
the abdominal apices, the male hangs below the female, which 
supports the weight of both, in the usual Lasiocampid attitude 
of a fallen leaf, the stalk of which is made by the palpi. 
With one brood which I carried through from the egg there 
were two larvee, which did a fourth change (5 larval instars), 
and lived for 47 days after the last change, then dying without 
any visible cause or attempt to pupate. 
Control.—The larve are attacked at all stages by a fungus, 
which has been identified by the Government Mycologist as 
Verticillium sp., a Penicillium being also found on a dead 
larva kept for some time, which Mr. Petch considers as being 
probably secondary. The attack of the Verticilliwm is rapid, 
larvee being suddenly found covered with the matted white 
hyphe of the fungus. A Phorid with a pupal period of about 
16 days was also found in suspicious circumstances emerging 
from dead larvee which had turned a dark brown prior to death, 
though there was no visible fungus attack. These had been 
placed in test tubes closed with a cotton wool plug when 
almost dead, and though it is not proved that the Phorid 
will parasitize healthy larvee, I think I am correct in stating 
that it will certainly oviposit in larvee before death from some 
other cause. Specimens of this fly have been sent out for 
identification, but this has not yet been done. 
EXPLANATION OF PLATE. 
Suana concolor. 
Fig. 1.—Larva, first instar. 3. 
Fig..2.—Larva, second instar. 3. 
Fig. 3.—Larva, third instar. X 3 
Fig.4.—Imago g.  X 1. 
Fig. 5.—Pupa g. X 3. 
Fig. 6.—Larva, fourth instar. X 1. 
