Parasites of Scale-Insect Fungi. T. Petch. 2II 
1-5-2 long. On Cordyceps dipterigena on a fly (Mydaea sp.), 
on Psychotria, Hakgala, March 1922. The fully rounded part- 
spores have not been seen in this species, but there does not 
appear to be any doubt that it belongs to Byssostilbe, not 
Torrubtella. 
The second species is of interest in showing how nature some- 
times lays traps for the systematic mycologist. Cordyceps 
dipterigena is remarkably regular in structure and habit. The 
insect attacked bears, as a rule, three clavae, a pair of ascigerous 
clavae from the thorax, and a single conidial (or barren) clava 
from the abdomen. I take the latter to be a conidial clava, but 
I have not yet detected the conidia on it. When attacked by 
Byssostilbe tomentosa, perithecia are produced on the body of 
the insect, and in irregular groups over the ascigerous stromata, 
while on the conidial stroma, a cluster of perithecia encircles the 
clava, so that it resembles a Cordyceps with superficial peri- 
thecia. If such a specimen were collected alone, it would almost 
14—2 
