December, ’24] 
CHAMPLAIN: ADIRUS A ROSE PEST 
649 
tunate in finding females ovipositing on the tender new rose shoots. 
These females were first observed flying around the rose bushes in the 
yard, alighting from time to time on the terminals of the new shoots that 
had made their growth during the season. Always head downward, 
they moved in that direction, using the tip of the abdomen and some¬ 
times the ovipositor as a tactile organ, inserting the latter at short 
intervals into the soft tender growth. But a second was required to 
insert an egg which was placed in the pith at right angles to the outer 
bark. 
Considerable damage is done by the females in puncturing the buds 
and terminals, several dozen punctures were observed along a distance 
of a few inches, although it is very likely that but few contained eggs. 
After hatching from the egg, the larva that gets the first start is appar¬ 
ently the only one that makes good in a single terminal, no instance of 
more than one in any completed tunnel was observed. Beginning with 
the terminal, which wilts and dies, the larva feeds on the pith, packing 
the excrement behind it as it travels through the stem, sometimes for 
considerable distances, varying with the length of the shoots and the 
time when the egg was deposited in relation to the season. 
At certain intervals the larva makes a girdle on the inside of the stem 
above where it is feeding and working and frequently the stem breaks 
at this point. When full grown the larva makes an opening partially 
through the stem to the outside, and spins a cocoon and overwinters in 
the space that it last occupied when feeding. Pupation probably takes 
place in the spring and our first records of adults are on May 21. 
Records in the collection of the Bureau of Plant Industry show that 
adult specimens were taken: 
Dauphin County, Pa.,—May 21, J. N. Knull; 
“ “ “ —June 1, A. B. Champlain; 
“ “ “ —June 30, H. B. Kirk; 
“ “ “ —July 4, J. G. Sanders; 
“ “ “ —July 12, A. B. Champlain. 
Records in the files show that larvae were found in stems during June 
and July. At Harrisburg, Pa., June 15th, Mr. P. T. Barnes found larvae 
about one-half grown boring in the new growth of American Pillar roses. 
Letters from correspondents refer to finding larvae in stems during July. 
On July 12 at Harrisburg where the observations on the oviposition of 
of this species were made, several stems contained small larvae. 
Cutting off the infested tips as soon as injury or wilting is noticed and 
before the larvae work very far down the stem, would be about the surest 
