CLASS V. INSECTA. 
171 
Stirps 3. — Labial palpi scarcely distinct: antenna placed in an ex- 
cavation of the thorax: mandibles with their apex arcuate and 
acute. 
Genus 103. MICROPEPLUS. Lair., Leach. 
■Antenna svith the club composed of but one joint: maxillary palpi with 
the last joint subulate. 
®P- 1 Micr. porcatus. Black; elytra cancellated. 
Staphylinus porcatus. Paykull. 
Inhabits sandy ground. 
Fam, XI. StaphylinidjE. 
■Antenna: gradually thickening towards their extremities, or terminated 
by a perfoliated mass : elytra covering about half the abdomen, or 
less, but very rarely more : body long, and more or less narrow. 
Gravcnhorst has written an admirable monograph on this family, 
entitled Monographic Cokoptcrorum Mkropterorutu. 
This is a very extensive family ; several hundred species are found 
in this country. They inhabit fungi in all its states; dung, roots of 
grass, flowers, under the bark of trees; and may be found in immense 
numbers in sand pits, and in the dung of animals, from which they 
may be driven by immersing the dung in water in the spring and 
summer months ; by this means many hundred specimens may be 
obtained in a single day: the smaller species should be placed on 
a piece of gummed paper, with the legs and antennte carefully ex- 
tended to show their characters. It is necessary to collect great 
numbers of them, as they demand a very minute examination, 
which, in many instances, requires the aid of a microscope, the 
characters being so very obscure. 
division. I. — Anterior margin of the head (bearing the mandibles) imme- 
diately behind the eyes, terminated by a transverse straight line, ( or with 
a line slightly bent in the middle,) not rounded or crooked at their sides. 
Antennte. inserted below the middle part, of the aboreementioned tine. Tho- 
’’ax lung. LSicck distinct. Body very long and narrow. Elytra covering a 
very small portion of the abdomen. 
Genus 104. STAPHYLTNUS. Linn., Fabr., Latr., Oliv., Lam., 
Gravenh., Leach. 
Palpi filiform: antennte towards their extremities distinctly thicker, 
moniliform, the last joint obliquely truncate or emarginate : Up 
deeply emarginate. 
S P- 1. Staph, erythroptcrus. Black ; the greater part of the antennte, 
elytra, and feet red; hinder margins of the head and thorax, the 
