In a brief note in the same publication for January 28, 1882, 
Prof French gave some reasons for believing that rotation of crops; 
would prevent injury by this insect In the same ; month he pub¬ 
lished under the name of Isosoma ally mi, in the Canadian E to 
mologist ” a full description of the adult of the parasite, Eupe mus, 
still under the impression that it was the imago of his wheat-straw 
worm. With this misunderstanding m mind, it is evident from the 
following paragraph extracted from this article, that this winged; 
narasite (Eupelmus) emerges from the straw m July and August, 
while the true straw worm passes the winter in the wheat stem m 
the pupa state. This misconception ot the facts will be found to 
have important implications, when we consider remedial measures 
“About four-fifths of the larva) observed changed to pupae and 
produced the imago, or died, the past season fiom July 20, w en 
the first imago was found, to August ‘20 or, perhaps better, un - 
went their changes between July 8 and August -0, but I think th s 
the effect of the dry season. Those examined the last of November 
were in the pupa state in the interior of the stalks down close to 
or in the substance of the joint, both m the fields and m my bleed- 
ing jars. Those were in the larva state the last of August. It. » 
probable they pass the winter in the pupa state undei oidmaiy 
circumstances to produce the imagines m the spring, and that those 
hatching during July and August perish without ovipositing. 
Following the above is a description of a species of Isosoma bred 
from grass (Isosoma elymi) which must be mentioned here because 
it was afterwards erroneously identified with the true wheat Isosoma. 
March 4, 1882, Prof. Riley again takes up the discussion to goo 
purpose. Having bred the larva successfully, he found the true 
imago to be a new species of Isosoma which he discribes as Isosomi 
tritici. He also gives an account of its habits, and points out tin 
characters distinguishing it from the joint-worm Tsosoma /iorden I 
this article Prof. Packard is quoted as authority for the comma 
occurrence of this straw worm in Virginia ancl other southern sec i 
tions. The supposition of Prof. French respecting the hibernation c 
this species is confirmed by Prof. Riley who says that it winters a 
larva or pupa, and issues in March and April, although aftei; a lat 
and warm autumn individuals emerged m December and January 
Prof. Riley also determined “Isosoma" allynii to be a parasitic specie 
of Eupelmus 
Next in the “Prairie Farmer” for March 11, and again for May *2 
Prof. French mentions and confirms Prof. Riley’s determination < 
his adult specimens as a species of Eupelmus, but announces tm 
he has successfully bred a genuine Isosoma from wheat straws coi 
taining the straw worm, and believes this to be the same as n 
Isosoma elymi bred from stems of grass, and described m the Can. 
dian Entomologist” for January 8, as already mentioned a boy 
Again, in the “Canadian Entomologist” for March, he reiterat 
this view, and mentions the common characters of the forms. 
It is important to note, however, that two of these are inaccural 
the head and prothorax of Isosoma tritici being smooth and srnnn 
