132 College of Forestry 
taken from spireea were continually on the increase up to 
September 1, although the numbers of these blossoms were 
rapidly decreasing. 
Trichius affinus Gory. Although this beetle occurs in 
some numbers throughout the entire summer, it is more 
numerous in July. It is found in the early season most fre- 
quently on the blossoms of raspberry, blackberry and daisy 
but with the appearance of the spirea bloom it shows a 
decided preference for this. 
Five species of Mordellide were taken from the blossoms 
studied and three were very common. The most common 
form is Anaspis rufa Say, which is present in considerable 
numbers from the third week in July until the close of the 
season. No effort was made to collect these consistently after 
the third week in July and on several of the weeks the speci- 
mens were so numerous that they were not saved. The 
general assertion, however, may be safely made that the 
seasonal distribution is timed to that of the spireea bloom- 
ing period. Mordellistena biplagiata Helm. seems to reach 
its maximum before the spirzea bloom is at its best and no 
specimens were taken after August 17. Mordella marginata 
Melsh. has about the same seasonal distribution as Anaspis 
rufa. 
Odontocorynus scutellum-album Say. This small cureu- 
lionid was taken on no other flower than that of wild spirea 
where it appeared to be feeding upon pollen. Its occurrence 
coincides very closely with that of this blossom. A pair in 
copulation was observed July 25, 1917. 
It is probable that most of the remaining beetles which are 
included in the table, but are not mentioned in the notes, 
are more or less casual or accidental visitors and are not on 
the flowers in search of food. Probable exceptions to this 
statement are furnished by Anthrenus castanew Melsh. and 
Epicauta pennsylvanica DeG., both of which are probably 
pollen eaters. 
