SB 
818 
€578 
ENT No. 11, SECOND SERIES. 
ited States Department of Agriculture, 
DIVISION OF ENTOMOLOGY. 
THE ROSE-CHAFER. 
(Macrodactylus subspinosus Fab.) 
GENERAL APPEARANCE AND METHOD OF WORK. 
At about the time of the blossoming of the grapevine and the garden 
rose a long-legged beetle of a light yellowish-brown color, called the rose- 
Fic. 1.—Maerodactulus subspinosus: a, female beetle; b, anterior part of male; 
c, pygidium of male; d, abdomen of male; e, larva; f, pupa—all enlarged (from 
Riley). 
> makes its appearance in certain sections of the 
chafer or “‘rose-bug, 
country, and strips vines and bushes of blossoms and foliage. This 
beetle is about a third of an inch in length and may be recognized by 
comparison with the accompanying illustration (Fig. 1, @). 
These insects appear, usually toward the middle of June in the 
northern States and about two weeks earlier in their southern range, 
suddenly and in vast swarms, in certain years, and overrun vineyard 
and orchard, nursery and garden. In about a month orsix weeks from 
the time of their first arrival, generally after having done a vast 
amount of damage, the beetles disappear as suddenly as they came. 
DISTRIBUTION, FOOD PLANTS, AND RAVAGES. 
The rose-chafer occurs in the North, from Canada and Maine south- 
ward to Virginia and Tennessee, and westward to Oklahoma and 
Colorado, being practically restricted to the upper austral life zone, ex- 
