pees 5 
walls are no protection from the cruel beak of the wood-pecker, and 
hundreds of these larvee are dragged from their Winter-quarters to satisfy 
the insatiable greed of these*birds. 
The stems of the plant are not girdled by the larve until the 
former are quite dead, and hence, the plant is not materially affected, 
and sections are not to be found scattered about on the ground much 
before October. 
Asa rule, concavus, and probably macer also, hibernate in the 
larval stage, but the former, at least, sometimes live over in the adult 
stage, as we have elsewhere shown to be true of another species of 
Curcuhonide (Rept Com. Agr., 1886,), whose transformations are 
quite similar in point of time. I have found adults of comcavus, on 
December 4th, and again in April of the following year, while in May 
I could find only larvae. I have found healthy larve in stems dug out 
of ice and frozen snow in January, and found them during the four 
months following, but have never been able to ascertain the time re- 
quired in which to pass the pupe stage, or the exact season during which 
this takes place, but opine that it will prove to be late in May and dur- 
ing June. My examples of the pupz were from stems containing 
larvee, kept in-doors. These transformed in January, and the pup 
period occupied only a few days. 
I have found larve only in Hehanthus and have repeatedly ob- 
served the adults feeding upon the foliage. In a single instance I ob- 
served a female ovipositing in S7/phium, or Rosin weed, and it is quite 
probable that they may be found in the stems of other, similar plants, 
besides Chenopodium, as observed by Prof. Riley. 
I have not studied the larvae of macer enough to find a ready 
distinction between them and concavus. They are usually more slender 
and less wrinkled, but it 1s doubtful 1f this holds true in all classes. The 
pupz are more slender, and the rostrum and anterior femora are much 
longer, and these afford a good basis of separation. 
The knowledge which I have obtained regarding the habits of both 
these species, would indicate a closer relationship between the two, 
than now accorded them, but much more remains to be learned of their 
habits in other localities, and, especially where both are common, 
if such a place can be found, before the question of relationship can be 
satisfactorily settled ; and it is with a hope of inciting such researches 
that these notes are given. 
