CLASS V. INSECTA. 175 



feet pale brown : head with t^vo 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. 



Omajium rivulare. Grarenh., Lutr. Staphylmus rivularis. Fai/k. 



Inhabits dunghills. 



Obs. — The following species may be considered as types of as many 

 genera : 



Genus Elonium. Leach. 

 Omalium striatum. 



Genus Omalium. Gravenhorst. 

 Omal. depressum. 



Genus Antiiobium. Leach. 

 Omal. melanocephaluni. 



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

 united. 



Genus 111. LESTIVA. Latr. Axtiiophagus. Grazcn., Leach. 



StaPhylinus. Fabr., Poi/k., Oliv. Carabus. Panz., Marsh. 



Antenna' nearly filiform, the second and third following joints obconic: 



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



truncate behind. 

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



and finely punctate : antennaj and feet obscure rufous. 

 Carabus dimidiatus. Punz. Carabus stajihylinoides. Marsh. Les- 



tiva punctulata. Latr. 

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



Genus 112. PROTEINUS. Latr., Leach. 



AntenncB evidently thicker towards their extremities : palpi subulate : 

 thorax transverse. 



Sp. 1. Prot. braclu/pterus. Depressed, flat, black, shining, smooth, silky 

 above ; mandibles, basal joint of the antenna', and feet, 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 t\vice 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. Latr. 



Inhabits France and England, 



