COLEOPTERA. 469 
thrusts out two little whitish bladders, which pour out a volatile 
liquid. Its larva lives under stones, and its habits are the same as 
those of the adult insect. It is very carnivorous, and very active, 
and often attacks those of its own kind. The Staphylinus hirtus 

Fig. 454.—Staphylinus maxillosus. Fig. 465.—Staphylinus hirtus. 
(Fig. 465) resembles at a distance a humble-bee, on account of its 
long yellow hairs. The Staphylinus maxillosus (Fig. 464) has 

Fig. 466.—Pselaphus Heisii (magnified). Fig. 467.—Claviger foveolatus (magnified). 
black and white hairs. The genera Pselaphus and Claviger, akin 
to the above, contain little insects which live as parasites in the 
nests of ants. The Pselaphus Heisii (Fig. 466), less than a line 
long, lives on the débris of reeds, on the borders of marshes. 
