whose larve are external feeders. 341 
In January, 1894, I observed some threads of Isaria 
in this jar, and found they proceeded from what turned 
out to be a cocoon of calthella, with a dead full-grown 
larva curled up inside; the cocoon was fairly tough, of 
yellowish silk and with scraps of moss coating it, ovoid, 
3mm. long and 1°5 broad. ‘The contained larva was 
somewhat damaged by the fungus and in removing it 
from the cocoon. The abdominal legs are all present, 
but the structure seems a little more modified, either 
really or by the Isaria, than in the two-third grown larva 
already referred to. The antennz are very long, the 
first long joint being very long, the second reduced as 
compared with younger larve. The ball appendages are 
proportionally rather smaller. The dots in the sulci 
between are now large, round, smooth, disc-like plates, 
comparing markedly with the rough surrounding skin, 
and having a central pigment spot. 
The ova are spherical, 0°46 mm. in diameter, of 
calthella almost white; of seppella 0-41 mm., a very 
little smaller and distinctly yellow. They have a snowy, 
mealy look, owing to a provision of a close coating of 
minute rods standing vertically on the surface of the ege 
and often tipped with a small bulb (of fluid?) ; whether 
these are adpressed to the surface of the egg when laid, 
or whether they afterwards develop in some way, I 
do not know, but I think the latter. Their function 
would appear to be to protect the egg from too close 
contact with the possibly very wet surface on which 
it lies. 
The young larva is difficult to examine owing to its 
delicacy, to its retracting its head when disturbed, and to 
its rapid shrivelling by desiccation, when removed from 
its natural habitat in damp moss. 
The peculiarities of its form and structure may be 
stated to be its angular outline, the possession of a 
number of remarkable appendages to each segment, of 
eight pairs of abdominal legs of unusual structure, and of 
an oval sucker; that the antennz are remarkably long 
for a lepidopterous larva, and that the head is retractile, 
so far, that it may occupy the interior of the 2nd thoracic 
segment. 
The larva does not appear to alter these characters 
during its growth to maturity. The antenna of the adult 
