126 College of Forestry 
number in 1917 having been taken during the third week. 
One specimen was also taken in July, 1914, and two on 
August 1, 1915. It has reached its maximum numbers about 
the time the wild spirza begins to bloom. 
Leptura vittata Oliv. This very abundant species begins 
to appear in some numbers before the wild spirea blossoms, 
but does not reach its maximum until these flowers are nearly 
at their best. In both 1915 and 1917 they had practically 
disappeared by the middle of August. Copulating pairs 
were seen July 17 and 27 (numerous) and August 17. The 
specimens show a considerable range of variation in the 
coloration of the elytra but this variation is within much 
narrower limits than in LZ. mutabilis L. vagans, ete. LL. vit- 
tata has been bred from dead larch wood but doubtless breeds 
in spruce and balsam in the Elka Park region as little or 
no larch is present there. 
Leptura nana Newn. Only two specimens of this small 
species have been taken from Elka Park. Of these, the one 
taken July 20, 1917, is entirely black, while the other speci- 
men taken July 23, 1914, is of the variety hematites charac- 
terized by the red prothorax. Nothing is known regarding 
its breeding habits. 
Leptura proxima Say is perhaps the most abundant 
lepturid in the Elka Park region, its only rival in this respect 
being Typocerus velutinus. In all, some 60 specimens were 
taken in 1917, all but one of which were on the blossoms of 
spirea. This single exception was on elderberry blossoms 
(Sambucus canadensis L.), but apparently had merely 
alighted there as it. was not feeding. The seasonal occur- 
rence of this species may be said to correspond nearly exactly 
with that of the wild spireea blossoms. It begins to appear 
with the first blossoms of the spirza, is at its maximum 
during the greatest abundance of these, and decreases in 
numbers with the waning of the flowers. The data from 
other years agrees entirely in this respect. Copulating pairs 
were common throughout the last week in July and the first 
three weeks in August. Wickham (1897, p. 192) reports 
