Insects Visiting Blossoms of Spirea 123 
on the appearance of the spirzea blossoms, showed a decided 
preference for these. 
The blossoms of mountain azalea (Rhododendron canes- 
cens [Michx.] G. Don), which were in full bloom during 
the latter weeks of June, 1917, attracted quite a number of 
insects, but these were entirely or nearly entirely honey- 
feeding forms such as certain bees, moths and butterflies. 
Pollen-eating forms did not seem to be attracted to them. 
Other flowers which coincide more or less with spirza in 
their period of inflorescence include especially the “ pearly 
everlasting” (Anaphalis margaritacea [L.] B. & H.) and 
several species of golden rod, notably the early golden rod 
(Solidago juncea Ait.), the wrinkled-leafed golden rod 
(Solidago rugosa Mill.), the white golden rod or silver 
rod (Solidago bicolor L.) and the flat-topped golden rod 
(Solidago graminifolia {L.] Salisb.). The flowers of all of 
these seem to exert an equal attraction to the honey-loving 
insects as do those of spirza, but this is not true as regards 
the pollen-eating insects, although some of them, such as 
Chaulignathus pennsylvanicus, for instance, which occur in 
late August, must, on account of the rapid decline of the 
spireea, depend upon the golden rod for most of their food. 
The species of golden rod most popular not only with this 
lamperid, but also with bees, yellow-jackets and hornets, is 
the flat-topped species, Solidago graminifolia. These began 
to appear in considerable numbers during the latter part of 
August (about August 24 in 1917) at a time when the 
spirea was beginning its rapid decline. 
In the following pages will be found some additional data 
and certain conclusions regarding a number of the species 
mentioned in the above table. Also notes on a few species not 
taken in 1917 but found on spirea during some previous 
summer are added. It will be readily seen, both from the 
table and from these notes, that most of the abundant and 
interesting beetles on spirza belong either to the subdivision 
of Cerambycide known as the Lepturint or to the family 
Mordellide. Both of these groups are well known flower 
frequenters and there can be no doubt that they depend upon 
