128 College of Forestry 
Typocerus velutinus Oliy. is one of the extremely common 
and numerous forms upon spirea blossoms. It begins to 
appear soon after these flowers and occurs in maximum num- 
bers when they are at their best. In general its seasonal 
distribution is similar to that of LZ. proxima, but appears to 
be about one week later both in its beginning and its decline. 
The data for the various years check very closely when 
judged in terms of the advancement of the season or of the 
condition of the blossoms upon which the adults depend for 
food. Copulating pairs were observed on July 27, August 3 
(common) 9 and 17 respectively. 7. velutinus shows a very 
considerable degree of variation in its color pattern. The 
light bands are nearly obsolete in some cases while in others 
they are so enlarged as to show a tendency to fuse more or 
less. Several adults have been bred from much decayed 
hickory at Syracuse and it is likely that it breeds in decayed 
wood of a variety of species of trees. 
Leptura cordifera Oliv. has the same seasonal distribution 
as T’. velutinus but in the region studied is not so extremely 
common as this other lepturid. There is much variation 
here as regards relative amount of black and yellow on the 
elytra. It has been bred from chestnut (Lugger, 1884, 
p- 204). 
Leptura canadensis Oliv. The seasonal distribution of 
this form is interesting from the fact that it appears later 
in the summer than any of the other lepturids taken on wild 
spirea. Another interesting fact is that up until August 13, 
but a single specimen had been seen and yet in this week 
seventeen specimens were taken — it being the most numer- 
ous lepturid at that time and remaining so for the rest of 
the season. Of the 30 specimens taken in 1917, six are of 
the variety erythroptera and the rest, which are of the more 
typical coloration show considerable variation in the amount 
of red upon the elytra. There is considerable disproportion 
in the number of males and females taken from the flowers, 
for of the thirty specimens twenty-four are males. Of the 
red-winged variety three were males and three females. 
