COLEOPTERA. 471 
of small size, and are distinguished by their elytra, which are 
short, and resemble a waistcoat or a jacket; but their wings 
are fully developed. The large species have strong mandibles. 

Fig. 463.—Staphylinus (Ocypus, olens, imago, pupa, and larva. 
When irritated, the Staphylini disgorge an acrid black liquid ; 
and by the abdomen they emit a volatile fluid having a musky 
odour. 































































Fig. 464.—Staphylinus (Ovypus) olens. 
We see frequently on roads the Staphylinus olens (Figs. 463 and 
464), which, when it finds itself attacked, raises its abdomen, and 

