148 
KATTTEAL HISTOEY OF 
of this genus is exemplified in the conspicuous spe- 
cies represented. 
STAPHYLINUS ERYTHRURUS. 
PLATE Y. Fig. 1. 
It is about an inch and a half in length, of a black 
colour, rather smooth and glossy, with the two last 
segments of the abdomen rust red. The mandibles 
are very large, and armed with strong teeth on their 
internal edge. The head, which is large and square, 
having the surface thinly punctured, is united to 
the thorax by a short neck. The thorax is nearly, 
half an oval, and considerably narrower than the 
head and elytra. The latter are rather thickly 
punctured, and have a narrow longitudinal ridge on 
each side of the sutural line. The abdomen is black, 
with the two apical segments deep red, and fringed 
on the sides with hair. The under side of the body, 
and the legs, are black. 
The individual from which the above figure is 
taken was obtained from North America. 
