332 STAPHYLINIDA. 
small in extent. The punctures on the epipleural series are not large, and are about 
twelve in number. The slender hind body has the four basal segments black, a little 
iridescent, each with a transverse series of punctures at the base, but the series on the 
first segment is very indistinct; the two terminal segments and the apical styles are 
red. The front legs are yellow, with the tarsi a little infuscate ; the middle legs yellow 
at the base, becoming darker outwards, so that the tarsi are nearly black; the hind 
legs black. 
The above description applies to five individuals from Panama, all of which are 
males ; and from the same locality, but not apparently found at the same spot or time, 
I have before me eight female individuals, which are rather larger and have all the 
legs, the palpi, base of the antenne, and front of the head quite or nearly black. Two 
female individuals from Guatemala are intermediate in colour between the males and 
females from Panama: it is thus impossible for me to say to what extent these colour- 
variations may be sexual or due to other causes, and it is even possible that all may 
not be really one species, though it is more than probable that the individuals from 
Panama are the sexes of a single species. 
8. Quedius concolor. 
Nigerrimus, nitidus, politus; antennis, palpis pedibusque anterioribus testaceo-fuscis ; capite orbiculato-ovato ; 
elytris longioribus quam thorax, punctis nonnullis haud magnis impressis; abdomine apicem versus parce 
punctato. 
Long. 10 millim. 
Hab. Guatemata, San Gerénimo (Champion). 
Antenne short, but little thickened externally, dusky yellow, the base rather darker 
than the apex. Hind body entirely black, with a slight iridescent tint, the two basal 
segments each with a transverse series of punctures near the base; the following 
segment at the sides sparingly punctate; the three apical segments sparingly, not very 
finely, punctate. 
This species is represented only by a unique female. It is readily distinguished 
from Q. graciliventris by the unicolorous hind body, and it is of less slender form; 
but in other respects greatly resembles that species. The front legs are darker on the 
anterior than on the posterior aspect. 
9. Quedius anthracinus. 
Quedius anthracinus, Solsky, Hor. Soc. Ent. Ross. v. p. 125+. 
Hab. Mexico}, 
IT am not acquainted with this species, which appears to be founded on an entirely 
black Quedius with iridescent hind body, and allied in many respects to the following 
species. 
