THE MUSEUM. 
59 
Next we come to an odd, apparently ill-mated, pair ; the winged gentleman dis¬ 
ports himself as he will, going whither he pleaseth, whilst his wingless helpmate, of a 
more domestic nature, never leaveth the house from the time of her birth until the 
hour of her death. This curious couple belong to the 
genus bearing the, t}y no means euphonious, name of 
Oiketicus. The figures represent a foreign species, 
and are drawn half the natural size ; a , is the male, 
b, the female, and c, the worm, or larva, from which 
they are produced, carrying its sack-like case along 
wherever it goes. Every one is familiar with our 
common bag-worm, terribly designated by science as 
Thyridopteryx Ephemerceformis , which is a smaller 
representative of the family here pictured. The worm 
makes its sack by spinning together fragments of 
sticks or leaves, from whatever tree it favors with its 
presence; when the worm is full grown the upper end 
of the sack is fastened securely, by silken threads, to a 
branch ; it then changes to the pupa within, and in 
due time the male emerges, a small winged moth, not 
unlike a large fly in appearance. The female never ac¬ 
quires wings ; her legs are too incomplete to enable her 
to walk, but she has no need of either wings or legs, 
as her whole existence is spent within the sack which 
N she spun when a larva or worm ; she is never to see 
the light, never to taste food. The peculiar structure 
of the male enables him to communicate with her, for 
the propagation of the species, without her leaving the 
pupa case or ever seeing her partner. She lays her 
eggs and dies within the case, her shrivelled remains being probably the first food 
of the young larva when they hatch. Soon after hatching, the latter scatter, each 
making his little sack, and the old story is repeated without variation, save in the 
case of such unfortunates as prematurely come to an end in the maw of some insec¬ 
tivorous bird. 
But from this homely lot, which have already taken too much space, we will turn 
to something brighter and prettier. Figure d represents the anchor moth ( Ccillimor - 
pha Interrupto-marginata) , of a creamy buff color, with an anchor marked in black, 
as distinctly as those we tattooed on our arms when school boys, in emulation of “y e 
jolly tar.” Of course, when the moth opens his wings to fly (he is shown when at 
rest) the anchor is separated longitudinally in the centre, one half being on each wing. 
Figure e is one of a group of lovely little butterflies that swarm the forests bor¬ 
dering the mighty Amazon river, in South America. They are technically desig¬ 
nated by the name of Catag?amma , but the common name by which they are known 
