468 THE INSECT WORLD. 
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. 462.—-Staphylinus (O¢ypus) olens, imago, pupa, and larva. 
When irritated, the Staphylint disgorge an acrid black liquid ; 
and by the abdomen they emit a volatile fluid having a musky 
odour. 



























































































Fig. 463.—Staphylinus (Ocypus) olens. 
We see frequently on roads the Staphylinus olens (Figs. 462 and 
463), which, when it finds itself attacked, raises its abdomen, and 
