CLASS V. INSECTA, 
175 
feet pale brown : head with two impressions between the eyes : tho- 
rax marginated, impressed at the hinder angles; back with two 
grooves : elytra twice as long as the thorax, obscure brown. 
'rralium rivulare. Gravenk., Latr. Staphylinus rivularis. Payk. 
n habits dunghills. 
The following species may be considered as types of as many 
genera : 
Genus Elonium. Leach. 
Omalium striatum. 
Genus Omalium. G ravenhorsl. 
Omal. depressum. 
Genus Antiiobicm. Leach. 
Omal. melanocephalum. 
b. Tarsi with elongate joints^ the last joint shorter than the others 
united. 
Genus 111. LESTIVA. Lair. Antiiopiiacus. Graven., Leach. 
Staphylinus. Fabr., Payk., Oliv. Cara bus. Fanz., Marsh, 
ntciftig nearly filiform, the second and third following joints obconic: 
V«lpi filiform : thorax elongate, somewhat cordiform, narrow, and 
truncate behind. 
P- 1. Lest, pniictulata. Black, fuscous, somewhat smooth, minutely 
and finely punctate : antenna; and feet obscure rufous. 
"tabus dimidiatus. Pans. Carabus staphylinoides. Marsh. Les- 
tiva punctulata. Latr. 
f "habits France and England ; in the latter it is rare. 
Genus 112. PROTEINUS. Latr., Leach. 
Antenna evidently thicker towards their extremities : palpi subulate : 
thorax transverse. 
** h ^ >rot ' hrachypterus. Depressed, flat, black, shining, smooth, silky 
above ; mandibles, basal joint of the antenna?, and feet, brown red : 
' 0 ad a little narrower than the thorax, triangular : thorax short, 
smooth, anteriorly a little narrower, the sides somewhat rounded, 
'' ev y slightly margined, the hinder margin twice as broad as long, 
r " e angles slightly prominent and somewhat reddish : scutelhuu 
^® r .y small : elytra elongate-quadrate, externally marginate, the 
. m< lw and external margins rounded : abdomen with the four last 
p J°mts naked. 
*oteinus brachypterus. Lair. 
habits France and England, 
