115 
John, Md., and a visit to the infested garden showed that the plants, 
which were only from an inch to 2 or 3 inches in height, were very 
badl} T infested. A dozen or more beetles were often found on a single 
plant, many in copula, and sometimes so many would be crowded into 
a single rolled blade as to make the interior look black. This was the 
third planting of corn which had been made in this plat. 
It was not possible to make a second visit to this garden until about 
a month later, and then the beetles had practically disappeared. Little 
additional injury had been done, and it seems probable that the beetles 
left the plants within a week after their first being noticed. 
Search was made for the larvae at the roots of corn and grasses, but 
without success. 
Earlier mention of this species and its attack upon millet and allied 
grasses was made by the writer in Bulletins 9 (n. s., p. 22) and 17 (p. 85). 
It has also been mentioned by different writers as an enemy to corn 
and to beets. On the former plant it sometimes occurs in abundance, 
and does conspicuous injury by making minute 
holes or elongate slits and white streaks on the 
leaves. It has been found injuring beets to some 
noticeable extent in Nebraska and Illinois, and in 
the latter State, according to Forbes and Hart 
(Bui. 60, Univ. 111. Agr. Exp. Sta., 1900, p. 
±66), it has been noticed in abundance on coarse 
grasses near Elizabeth, 111. Like most of the 
Chrysomelidffi, it hibernates as an adult, and eggs 
have been obtained early in Jul} 7 . Otherwise its 
life historv appears to be unknown. fig. 29.— chaetocnema pun- 
This flea-beetle resembles the species which S^^^ffi,^ 
will next be figured, and with which it is con- 
generic in general structure as well as in habits. It is, however, 
much larger, measuring fully twice as long, or about one-tenth of an 
inch, is more robust, somewhat irregularly oval, and the entire surface 
is uniformly brightly bronzed and slightly brassy. 
It is broadly distributed from the New England States southward to 
Florida and Texas and westward to California. It apparently occurs 
nearly everywhere east of the Rocky Mountains, and westward has 
also been recorded from Utah and Montana. 
The Brassy Flea-beetle (Chcetocnema imlicaria Mels.). — Injury to 
sweet corn by the toothed flea-beetle, as above reported, was compli- 
cated by the presence of this second species, which, however, occurred 
in much smaller numbers. 
This species (fig. 29) is the more abundant of the two in most locali- 
ties, and considerably smaller. It is probable that it is usually the 
cause of the trouble attributed to it. This flea-beetle measures less 
than one-twentieth of an inch, and is of oval, slightly oblong, convex 
