CLASS V. INSECTA. 177 



Obs. — Of this genus the following species may be considered as types 

 of the undermentioned genera : 



Genus Aleochara. Grav. 

 Sp. 1. Aleo. fuscipes. 



Genus Drusilla. Leach. 

 Sp. 1. Aleo. canaliculata. 



Genus Falagria. Leach. 

 Sp. 1. Aleo. sulcata. 



Genus AuTALiA. Leach. 



Sp. 1. Aleo. impressa. 2. Aleo. ri\T.ilaris. 



Genus 116. LOMECIIUSA. Grav., Lafr., Leach. 

 Head disengaged from the thorax behind, with an inconspicuous neck 

 or none : thorax transverse, the sides rounded : antenna distinctly 

 perfoliated. 



Sp. 1. Loin, cmarginata. Bro\\'n-reddish rather opaque, minutely pimc- 

 tulated : elytra pale, testaceous ; hinder angles of the thorax and 

 elytra terminating in spinous points. 



Lom. emarginata. Grav. 



Inhabits dry sand spots under stones. 



Obs. — Genus Dinarda. Leach. 

 The type of this genus is Lomechusa dentata. Grav. 



Fam. XII. Pselaphidx. Leach. 



Dimera. Latreille. 



Elytra abbreviated : tarxi with three articulations : clans monodactyle. 



" Latreille supposed that these aninrals had but two joints to their 



tarsi, and therefore placed them in a peculiar section of the Cole- 



optera; observing, however, that they are allied to Aleochara, to 



whose family they are even referred by Kirl)y." 



Dr. Leach considers them as constituting a distinct family, whose 

 situation is intermediate between the Staphi/linidee and Scj/dina:uiiJ^, 

 to both of which they are intimately allied ; but may be distinguished 

 from either by the structiu-e of their claws, and from the latter also 

 by their abbreviated elytra. 



In the third volume of the Zoological Miscellany is given an e,i?- 

 cellent monograph of the genera of this family, in which are enu- 

 merated nineteen British species, five of which are new, and none of 

 them were known to Mr. Marsham, who has not described one spe- 

 cies in his Entomologia Britannica. 



1 . Antenna with eleven joints. Maxillary palpi elongated, 

 Stirps 1. — Body elongated and depressed. 



M 



