Q4 INJURIOUS INSECTS OF I909Q AND IQIO. 
course. They would have to be in position during the last of May, 
or early part of June. 
In some cases it might not seem desirable to treat a whole flower- 
bed, or a whole garden, for these stalk-borers, and it might only be 
desirable to prevent their getting at a few plants which might be 
decidedly more valuable than the rest. In such cases it has been 
found that the bases of the stalks of the plants may be smeared 
with tangle-foot for a distance of about three and a half inches up 
from the ground. In such cases if there are leaves around the base 
of the plant, or (if the tops of the plant lie against other plants 
near by) these portions of the plant which would allow cater- 
pillars to crawl from the ground over the tangle-foot, or from other 
plants on to the protected plant, should be cut away and destroyed. 
Parasites. 
These two species appear to be extensively parasitized, since 
we have reared many individuals of Tachinids from them. From 
P. cataphracta, Hypostena variabilis Coqg., and from P. nitela also, 
an Exorista sp., also Masicera myoidaea Desv. in large numbers; 
the last named being identified by Professor Aldrich. From a 
breeding-cage containing both species we reared what I regard as 
Ichneumon laetus, and evidently [chneumon orpheus Cress. From 
some material emerging from the pupa of P. nitela, Professor Ald- 
rich also named for us an Ortalid, Chaetopsis aenaea Wied. 
We have considerably more parasitic material from these two 
species, of at least one genus and parasitic. 
Dr. Franklin had charge of this work and the above represents 
his report in this connection. 
