142 
b. A small, white, footless grub, with brown head. 
The Strawberry Crown-Borer. 
Tylodermci fvagaries, Riley. 
Order Coleoptera. Family Curculionid^e. 
[Plate IX, Fig. 6.1 
A full and elaborate account of this species was given in my last 
report, and I recur to it here only to add a few particular re- 
specting its life history. _ . _ ,,, 
Thp Infest observations mentioned in the article m the lwelrth 
Report were made on the 10th of April. 1881. On the 20th of May 
i du. up at Oentralia a great number of plants from fields in which 
the borers had been abundant the previous year, and opened the 
crowns without finding so much as a single specimen. On the 15th 
of June, a very few adult beetles were still to be seen in strawbeny 
fields at Anna, as reported to me by Mr. 0. W. Butler < 
nlace On the 9th of July, at Anna, larvae of the new brood woe 
found in the main roots of strawberries, by my assistant, Mr. Barman; 
and at Villa Ridge on the 11th, larv®, pup* and moot ly trans- 
formed images occurred in the same situation On the 12th pupa 
and imao-os but just transformed, were also found at Anna, and a 
few larvae occurred among plants which had been set that spring. 
On the 1st of August, mature larv* and seveial adults were taken 
from the crowns of strawberries at Cobden, although they were here 
as e'sewhere throughout Illinois, very rare, even in fields where 
they had been abundant the year before. 
On the 6th of August, all the stages were found at Oentralia, the 
larv* being all full-grown. On the 6th of September when Mr 
Webster visited this place, no larv* occurred in the plants, but adults 
and pup® only were taken from them. These were in the margin 
of a field adjacent to some runaway strawberries which had spread 
throughout the orchard, where they had been allowed to grow with¬ 
out interference for several successive years On the [th ot • 
eember, Mr. Garman found at Anna a single adult taken in the 
upper part of the root of the strawberry plant; and several oc¬ 
curred on the 10th among rubbish in a field which had not been 
mulched. 
These observations extend somewhat the period over which the i 
development of the brood is scattered, but give us no slightest h nt 
of a second brood. It also appears that in rare instances bee 
hibernate within the crown of the strawberry, and consequently may 
be conveyed to a new field by plants dug up in the spring. ’ 
ever, as only a single beetle lias been found by us m these' . JJ 
tions, out of the many hundreds of crowns examined, it is evirten , 
that this is too ..infrequent an occurrence to have any lmportanH 
significance. Respecting the undoubted tact of a grea c i 
in the numbers of this insect as compared with those occurring law 
year, I have no explanation to offer, since the weather would noi^ 
seem to have been unfavorable to them. 
