230 
DISEASES OF THE COTTON PLAINT. 
It should here be mentioned, however, that the larvae 
of an insect of this species have been accused in Europe of 
feeding upon the pith and stems of grasses and succulent 
roots, but at the same time it is stated to feed also upon 
the larvae of other insects. 
Another very similar insect {Zabrus gihbus), both in 
the larva and pupa state, is said to be injurious to wheat in 
Europe ; and although the two last mentioned may be 
injurious to vegetation, yet, as a general rule, tbe Carabidce 
are carnivorous, and destroy multitudes of insects m the 
larva, pupa, and perfect state. 
The Devil's Coach-Horse. — [Reduvim novenarius.) 
This insect abounds in the city of Washington, during 
the summer and autumnal months, and is very useful in 
destroying the disgusting caterpillars which swarm on the 
shade-trees. The eggs are deposited in autumn upon 
branches, and are hatched in May or June. When young, 
the insects have abdomens of a bright-red color, with some 
dark or black spots on their backs. The head and thorax 
are black. When they shed their skins, they are grayish 
in color, and display only the rudiments of wings. It is 
only in the last stage that they acquire perfect wings, when 
they are capable of flying with great vigor. 
The perfect insect measures about an inch and a quarter 
in length. It destroys multitudes of noxious insects, in 
every stage of their growth, and is therefore highlj bene- 
ficial ; but, at the same time, it is dangerous to man, if 
handled incautiously, as the punctures made by its piercer 
are often followed by severe consequences. When about 
to attack another insect, it advances toward its prey with a 
most cautious and stealthy gait, lifting up and putting 
