84 MISSOURI BOTANICAL GARDEN. 
In the gross appearance of artificial cultures of Graph- 
ium and of Ceratostomella there is often a striking resem- 
blance or mimicry. The secondary conidial stage of the 
former resembles superficially the conidial stage of the lat- 
ter, and the mucous head of the former that of the perithe- 
cial stage of the latter at the time the ascospores are ejected 
ina viscid drop. The mucus surrounding the conidia of 
Graphium is soluble in water; on the other hand, the jelly- 
like substance exuded from the perithecia of Ceratostomella 
is very difficultly soluble in water. Both are well adapted 
for adhering to the bodies of insects with which they come 
in contact. 
PEeERFECT OR CHAETOMIUM STAGE. 
The Chaetomium stage of Graphium observed by Bou- 
langer has not been found in connection with the species 
studied; but asthe cultural work on G'raphium has not yet 
been concluded, it is hoped that by the use of the proper 
culture media some species may finally be stimulated to pro- 
duce perfect forms, either of Chaetomium or other genera. 
In the consideration of the species of Graphium studied, 
it is thought best to separate them into the following groups 
based on the form of fruiting in the secondary conidial 
stage : — 
A. Species of Graphium with a secondary conidial stage with conidia 
resembling those of Sporotrichum. 
B. Species of Graphium with a secondary conidial stage unlike Sporo- 
trichum, 
1. Species with secondary conidia borne continuously and terminally, 
falling at once in clusters. 
2. Species with secondary conidia borne either in simple clusters or 
in clusters of short branched chains. 
