CLASS V. IN'SKCTA. 175 



feet pale browni : head with two impressions between the eyes ; tho- 

 rax inarginated, impressed at the hinder angles; back with two 

 grooves : elytra twice as long as the thorax, obscure brown. 



Omalium rivularc. Gravenh., Lutr. Staphylinus rivularis. Pai/k. 



Inhabits dunghills. 



Ods. — The following species may be considered as t}-pes of as many 

 genera : 



Genus Elonium. Leach. 

 Omalium striatum. 



Genus Omalium. Gravenhorsf. 

 Omal. dcpressum. 



Genus Antiiobiim. Lcacli. 

 Omal. melanocephalum. 



b. Tarsi with elongate joints, the last joint shorter than the others 

 united. 



Genus 111. LESTIVA. Latr. Antiiopiiagus. Graven., Jxach. 



Staphylinus. Fabr.,Payk., Oiiv. Cakabus. Panz., Marsh. 



AnteniKz nearly filiform, the second and third following joints obconic: 



jialpi filiform : thorax elongate, somewhat cordiform, narrow, and 



truncate behind. 

 Sp. 1. Lest.pwictulata. Black, fuscous, somewhat smooth, minutely 



and finely punctate : antennas and feet oljscure nifous. 

 Carabus dimidiatus. Pauz. Carabus staphylinoides. Marsh. Les- 



tiva pimctulata. Lafr. 

 Inhabits Franco and England ; in the latter it is rare. 



Genus 112. PROTEINUS. Latr., Leach. 



Antenna: evidently thicker towards their extremities : palpi subulate : 

 thorax transverse. 



Sp. 1. Prot.hrachi/plcrus. Depressed, flat, black, shining, smooth, silky 

 above ; mandibles, basal joint of the antenna^, and ieet, brown red : 

 head a little narrower than the thorax, triangular : thorax short, 

 smooth, anteriorly a little narrower, the sides somewhat rounded, 

 very slightly margined, the hinder margin twice as broad as long, 

 the angles slightly prominent and somewhat reddish : scutellum 

 very small : elytra elongate-quadrate, externally marginate, the 

 hinder and external margins rounded : abdomen with the four last 

 joints naked. 



Proteinus brachypterus. Ltitr. 



Inhabits France and England. 



