New YorK AGRICULTURAL EXPERIMENT STATION. ONES 
present on any of the specimens. Many of the asci had their 
spores nonseptate; others, however, were septate. 
Some peculiarities of pumpkin as a host.—Judging from the 
very slight injury done to the pumpkin vines there seems no 
doubt but that this host would be immune under ordinary condi- 
tions, though the presence of living mycelium in the naturally 
hollow pith region would probably have caused more trouble in 
course of time. _ 
Perhaps the most) striking peculiarity noted on this host is 
the entire absence of pycnidia from both ascosporic and pyc- 
nidiosporic infections. A large number of lighter-colored fruit- 
ing bodies farthest removed from the inoculations were care- 
fully examined in the hope of their being pycnidia, but without 
exception, they were young perithecia in various stages of de- 
velopment. The substratum or host seems to be the determining 
factor as regards the production of perithecia and pycnidia and 
it would be of great interest to find some way of reproducing 
these conditions in pure cultures. 
Inoculation of watermelon vines.—On August 31 inoculations 
with both types of mycelia on watermelon vines (Citrullus 
vulgaris), growing in the garden, were made. The infecting 
was done in the usual way by wounding the internodes of the 
vine with a sterile scalpel. Two vines were inoculated at two 
points each with pycnidiosporic mycelium and two other plants 
with ascosporic mycelium; one at three points and the other 
at two. Two checks were prepared for the group of four and 
three checks for the group of five. On September 5 all inocula- 
tions of both groups had taken and one vine in each group had 
wilted. Pycnidia were present on vines of both groups. They 
were the size and character of the Diplodina before mentioned ; 
the spores also agreed in both size, form and color. Eleven 
days later, September 16, some of the dead and dying vines were 
collected. Specimens from both types of inoculation contained 
perithecia and pycnidia. The checks were all without any 
traces of disease. 
Comparison, of susceptibility of muskmelon and watermelon. 
—The parasite did more active and destructive work on water- 

