( 39 ) 
species to his third family of Staphylinus, from which it 
certainly differs in the characters above stated. 
XANTHOLINUS, Dahl. 
1. X. emmesuSf Grav. Coleopt. Micropt. 176 belongs 
to this genus. It is subject to vary in its colouring; the 
abdomen is often piceous, and sometimes even still paler. 
2. X. cefliahiSj Black ; antennse reddish-brown ; elytra 
and feet honey-yellow. 
Inhab. Virginia. 
Body black, polished : head elongated, sides parallel, 
punctured ; punctures numerous and larger each side, ex- 
cepting immediately the line behind the eye obsolete on the 
longitudinal middle ; a larger puncture each side at base ; 
and a slight longitudinal indentation on the basal margin; 
thorax as wide as the head anteriorly, becoming grad- 
ually a little narrower to the base ; a dorsal series of 5 or 
6 punctures; lateral four or five punctures ; on the anterior 
termination of this series a much dilated slight indentation ; 
marginal puncture one ; basal edge each side and lateral 
edge with a series of punctures : elytra honey-yellow, irreg- 
ularly, not profoundly punctured : pectus rufous ; feet ho- 
ney-yellow : abdomen piceous-black. 
Length one-fourth of an inch. 
The head is large, longer than the thorax. I obtained it 
on Chinqnotege Island. 
3. X. hamatusp Piceous ; antennje, elytra and feet yellow- 
ish. 
Inhab. U. S. 
Head piceous-black, ovate, with sparse, profound punc- 
tures, wanting on the longitudinal middle and immediately 
in a line behind the eye : antennce reddish-brown, paler at 
base ; palpi pale reddish brown : thorax rufo-piceous, not 
distinctly contracted behind ; dorsal punctures about ten, 
with an anterior, nearly parallel, exterior series of about 
four ; lateral series ten or twelve punctured, extending to 
the locality of the posterior angle, and at its anterior ex- 
tremity curved outward and backward with four or five ad- 
ditional punctures : dytra honey-yellow, sparsely and irreg- 
ularly punctured ; a somewhat elevated line on the sutural 
submargin : feet dark honey-yellow. 
Length about one-fourth of an inch. 
