CORRESPONDENCE. 111 
body being armed with two horny hooks, and having a single fleshy leg 
beneath, and are usually black in color. The larva of Calosoma (C. cali- 
dum, Fig. 1; Fig. 2, the beetle of C. calidum Fab Fig. 6. 
and Fig. 3, C. scrutator Fabr.) ascends ue | io 
feed on caterpillars, such as 
Fig. 8. 
saw it fiercely attack a June- 

a sides of its clumsy and 
helpless victim with tiger-like 
ferocity. Carabus (Fig. 4, C. serratus Say; Fig. 5, pupa of Carabus au- 
ronitens of pode after Westwood) is a closely allied form, with very 
Similar hab 
A much tik form is the curious Bombardier beetle, Brachinus (Fig. 
Fig.10. 6, B. fumans Linn.), with its narrow head and heart-shaped 
ZAN rothorax. It is remarkable for discharging with quite an 
¥% explosion from the end of its body a pungent fluid, prob- 
ably as a protection against its enemies. Fig. 9. 
An allied genus is Casnonia (Fig. T, C. Penn- 
sylvanica Dejean) which has a long neck and 

Say, represent two common forms. he 
former is black, while the latter is a pretty 
insect, apes pone purplish red wing- 
covers, and bla 
Fig. 10, vane’ fias three lines, represents a singular 
| larva found by Mr. J. H. Emerton under a stone early in 
sprin ei Dr. Leconte, to whom we sent a figure, supposes 
that it may possib y be a larva of Harpalus, or iaae CT It 
is evidently a saith fee bid. The under side is re 
In our monthly calendar for 1868, we shall not rile: nore facts stated 
in the calendar given in Vol. I. of the NaTURALIST. 

+ 
CORRESPONDENCE. 
E. L. pa New York.—There is no manual of American En Entomology * 
giving a general account of insects and the classification of ‘the North 
ulate ad: col aga a eee ee 


*The writer has ready for the press, A amcar erence e 
sects, which will be published during the year. It is designed to be a general introduction to 

