60 LEAFHOPPERS AFFECTING CEREALS, ETC 
The nymphal forms have not been heretofore described, but were 
observed at Seattle in 1909, occurring on the coarse grasses upon which 
the adults were found. They are light green with pale wing-pads. 
The head is only bluntly pointed. The economic importance depends 
entirely upon whether the coarse grasses upon which it feeds have 
any economic importance. In some places these are used for hay 
or for covering to ha3^stacks, while in some parts of the Northwest 
they are being used quite extensively in the manufacture of mats and 
various kinds of furniture. In any case it would be a more difficult 
species to control than mollipes on account of the rank growth of 
the grasses upon which it occurs. The main opportunity for attack 
would seem to lie in a cutting of the grass in autumn after egg depo- 
sition, which would serve to destroy the eggs or remove them from the 
locality where they could be of injury. 
DlEDROCEPHALA COCCINEA Forst. 
Diedrocephala coccinea Forst. is a bright colored species, one of 
the handsomest of all jassids, about the size of DrseculacepTiala 
mollipes but differing in the shape of the head, which is rounded in 
front. The elytra are marked with brilliant blue and red stripes. 
The nymphs are yellow with dark wing-pads. 
There are two generations annually, and nymphs of the first gener- 
ation occur during May and June, and adults may be found about 
the middle of June until the latter part of July and for the autumn 
generation during September and October. The nymphs, therefore, 
must develop during the periods from the latter part of June until 
late August. Apparently the winter is passed in the egg form, and 
nymphs should occur in the spring from the hatching of eggs earlier 
in the season. The species is much more common in woody locali- 
ties and usually is to be swept from the undergrowth of grass and 
weeds. It occurs, however, in localities where grass is a large 
admixture of the vegetation, and it seems quite certain that the 
grasses constitute a part of its food supply. 
The Bog Leafhopper. 
(Helochara communis Fitch.) 
The bog leafhopper (Helochara communis Fitch) is an extremely 
abundant species throughout the larger part of the country, and 
may be found in practically every locality in the United States 
where suitable food plants occur. 
It is a small, dark-green species, about one-fourth to one-third 
of an inch long, the head and prothorax longer than the rest of the 
