1886. ] BOTANICAL GAZETTE. 15 
The habit of the larve isto feed during the night and remain 
concealed during the daytime, but when attacked by the fungus 
they crawl as high as possible before daylight, coil around the 
edge of the object, usually horizontally (figure 1), and do not again 
descend. Until ten o’clock in the morning most of them are 
still able to crawl about when disturbed, but are sluggish. B 
noon the insect dies, and the rhizoids fasten it firmly to the sup- 
port. Some hours afterwards the normal yellowish or pea-green 
color is changed to a dull gray by the appearance of the hyme- 
nium. The spores are produced late in the afternoon, and during 
the night they are discharged ; by morning only a small shriveled 
and blackened mass remains, while the objects beneath are powdered 
with the colorless and evanescent spores. the dead insect be 
placed on a pane of glass over night, the body will be surrounded 
in the morning by a halo of spores nearly two centimeters in di- 
ameter. When the atmosphere is damp enough during the night, 
the mycelium grows out over the whole body as a white pubes- 
cence. This is the usual course of development. 
A larva dissected an hour ur two before its death shows a mass 
of interlacing hyphe (figure 9) among the muscles which line the 
outer wall of the body ; the viscera are still unaffected. The hy- 
phe are quite uniform in size, with finely granular contents and 
vacuoles of various sizes, and are extensively branched. s the 
mycelium grows it encroaches upon the internal organs, and 
eventually fills up the whole cavity of the body, except that it 
does not enter the alimentary tract or the trachex. The internal 
organs, except the two just named, together with the fluids of the 
body are entirely consumed by the fungus. The larva when now 
cut across presents a firm interior traversed by the cavity of the 
alimentary tract (figure 5). In some cases, however, certain bac- 
teria, and occasionally yeast, have become so abundant before 
this stage is reached that the tissues are converted into a slate- 
colored liquid, and the growth of the fungus is checked. 
The rhizoids appear before the hymenium is formed, but whether 
before the insect is dead or not was not determined; nor was it 
ascertained on just what portions of the ventral surface they oc- 
eur. They will extend a full millimeter in length when the in- 
sect is removed from the supporting object and placed in a dam 
atmosphere. They consist of straight colorless hyphz, with walls 
much distorted and ends somewhat flattened 
The hymenium, which surrounds the whole body, presents a 
uniform thickness when not grown in a very moist atmosphere 
(figure 11), The conidiophores branch at their base (figures 6 and 8), 
