134 INJURIOUS INSECTS OF I909 AND IQIO. 
August 4th. Nineteen moths in all were reared. With this mate- 
rial at his disposal. 
There is bottled material showing the work of this insect, and 
for that matter branches showing its work could at any time be 
collected. At all events, if this insect is written up, it would be de- 
sirable to have a photograph showing its work. Some of the borers 
were bottled, and some were also inflated. All the pinned and bot- 
tled material connected with this borer may be found by referring 
to accession references of experiments 544, 588 and 590. In experi- 
ments 588 and 590 parasites emerged and were pinned. 
Mr. W. D. Kearfott identified this insect as Proteopteryx wil- 
lingana, which is described by him in the Canadian Entomologist 
Vol. XXXVI, page 306. The late Dr. Fletcher refers to it (Report 
of 1904) as “The Negundo Twig Borer,” and states that it has 
become quite a pest in Canada to trees of that genus, though not a 
serious one. It occupies about the same position in Minnesota. 
Manifestly the burning of infested twigs which contained insects 
would afford relief during the latter part of June and during July 
would be a desirable way to lessen their numbers. 
