NATURAL ENEMIES 
65 
species of Empusa attacking other insects, a much 
greater degree of moisture is necessary, and certain 
forms occur only in very moist situations. 
In germinating, each hyphal body or resting spore 
sends out one or more hyphse, which grow with great 
rapidity, but the manner of this germination, together 
with the subsequent development of the resulting hy- 
phae, varies considerably with different species and un¬ 
der different conditions. In the simplest case a single 
hypha thus produced may grow directly to the outer 
air and then produce a single conidium or set of con- 
idia. In other cases a single hypha may branch indefi¬ 
nitely, each final branch bearing a conidium or conidia. 
This usually happens where the conditions of growth 
have been very favorable, and the complex may be 
found side by side with the more simple form. 
The conidium or spore is formed by budding from 
one of these hyphse, which in this case is called a con- 
idiophore. This bud increases in size and becomes 
separated from the conidiophore by a cross-partition. 
Within the mother cell thus formed is developed a 
single spore. When this cell increases in size by the 
absorption of water, the wall of the mother cell be¬ 
comes separated from that of the conidium and some¬ 
times to such an extent that the conidium is seen float¬ 
ing free in the large spherical mother cell. Finally by 
a rupture the conidium is discharged violently into the 
air, often for a considerable distance. With Empusa 
muscce, the conidia are bel'l-shaped or nearly spherical, 
with a broad base and a measurably pointed apex, 
