by naturalists to illustrate the most varied principles of architecture, and to 
suggest designs not yet realized by man. A little circle of cells on the summit 
have the effect of stained glass windows of definite but unusual patterns. Then 
follow what might, be termed vestibule cells, since by their agency entrance is 
made for the fertilizing principle. Their shapes are varied, presenting the 
sphere, the hemisphere, the spindle, the sugar-loaf and many others. The pro- 
258 THE LIVING WORLD. 
BUTTERFLIES AND MOTHS. 
Butterflies, alike from their ever-varied form and coloring, are among the 
most commonly observed of the insect world. In their modes of passing the 
winter there is also great variety. Some exist solely as eggs, which early spring 
is to quicken into life; ’ others have already become butterflies , but without 
reaching maturity; yet others hibernate like the bears. The caterpillar wears 
his skeleton upon the outside, where, with its series of rings, it serves as a coat 
of mail. I11 this are nine pairs of openings connecting with tubes, and with 
admiral butterfly ( Vanessa atalanta). silver wing ( Argynnis paphia ). CHECKERED BUTTERFLY. 
them composing the organs of respiration. In addition to the metamorphosis 
which proceeds to the grub, thence to the chrysalis, and finally to the butterfly , 
the insect sheds its skin at least eight or ten times. The evolution of butter¬ 
flies as an order may save repetition, for peculiarities of the different species 
will then alone remain to be mentioned as these species pass in review. Begin¬ 
ning with the egg, we find this to be about as large as the head of an ordi¬ 
nary pin, with a shell thin and elastic. Even the forms of these eggs are said 
METALLIC WINGED. 
WHITE FLECKED. 
NIGHT MOTH 
(Noctua trape- 
sina). 
