1 897 THE MICROSCOPE. 51 
over-arches and extends beyond the aperture, and gives 
it the appearance of an inverted canoe. 
The antenne of Argynnis possess small transparent 
dots and chambered cavities. Antenne of the Dragon-fly 
furnish the most beautiful examples of these acoustic 
chambers, aud display the nerve well. 
The antenne of the Silk-worm show a variation in the 
sexes, those of the male being pectinated throughout 
equally, while in the female the branches are shorter and 
q@lternate, a short one with a long one. 
To secure the female, it is often easier to collect the 
immature forms, and by putting the newly hatched 
female in a box having a perforated cover the males will 
find their way to the house, also through a small open- 
ing in the window and often into the box itself in search 
of a mate. Sometimes three or four males may be se- 
cured in this way. 
One should look for Branchinus, Calathus, Harpalus, 
Dytiscus, Elater, Silpha, Earwig, Cockroach, Hawk-moth 
and Nocterna, of various kinds, Their large plumed anten- 
ne make beautiful objects when mounted dry, and in the 
smaller insects it is well to mount the head entire with 
the antenne in situ. 
In addition to the illustrations of the eight classes of 
antenne, that of the Tabanus (fig. 9) and of the Soldier- 
fly (fig. 10) make interesting objects when mounted. 
Fungi.—Dr. Jelliffe, in his lecture on mushrooms and 
toadstools, says that all the fungi are beasts of prey, 
speaking from a vegetable standpoint. The germs of 
cholera, typhoid fever, consumption, diphtheria, ring-worm 
and the disease of fungus food known in India, present 
types of the fungi that live upon the human body. Yeast 
lives upon the flour and sugar in the process of bread- 
making. Moulds live upon bread, cheese, and preserves 
while the higher fungi (mushrooms) draw their life from 
decayed animal matter, decayed wood, or manure. 
