13 
guishable sizes of the larvae may be found at one time in the mines 
under the bark, each apparently representing a different generation. 
The eggs are deposited in June and July and possibly later, as the 
beetles are abroad until towards the middle of August. The young 
grub, after hatching, works its way under the bark, making a ser¬ 
pentine burrow as it feeds, which increases in size with the growth 
of the larva and in course of time may completely girdle the tree. 
When the larvae are full-grown they change to the pupa in the 
early part of the year, and the beetles begin to appear in May.* 
This species has been recorded from Vermont, Canada, and 
Wisconsin, to Pennsylvania, Kentucky, Illinois, and Iowa. It 
seems to have a general distribution thruout the northeastern 
United States. 
The Reddish Eem Snout-beetle 
Magdalis artnicollis Say 
A small boring grub about a quarter of an inch long or less, 
frequently associated with the round-headed borer of the elm often 
occurs in immense numbers in the recently dead wood of the elm, 
Fig. 3. Elm Snout-beetle, Magdalis artnicollis’. larva, pupa, and adult beetle. 
(Enlarged 8 diameters.) 
and sometimes extends its burrows into the still living tissue ad¬ 
jacent. It is a small, plump, entirely footless, whitish grub, lying 
partly curled up in the usual grub fashion when at rest. The head 
is small, but the three segments back of the head are noticeably 
*My office collections of the beetles range from May 19 to August 8. 
