CLASS V. INSECTA. 177 



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

 of the undermentioned genera : 



Genus Aleochaka. Grav. 

 Sp. 1. Aleo. fuscipes. 



Genus Drusilla. Leach. 

 Sp. 1. Aleo. canaliculata. 



Genus Falagria. Leach. 

 Sp. 1. Aleo, sulcata. 



Genus Autai.ia. Leach. 



Sp. 1. Aleo. impressa. 2. Aleo. rivularis. 



Genus 116. LOMECIIUSA. Grav., Latr., Leach. 

 Head disengaged from the thorax behind, with an inconspicuous neck 

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

 perfoliated. 



Sp. 1. Lorn, emarginata. Bro\\'n-rcddisii ratlier opaque, minutely punc- 

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

 elytra terminating in spinous points. 



Lorn, emarginata. Gmv. 



Inhabits dry sand spots under stones. 



Obs. — Genus Dinarda. Leach. 

 The type of this genus is Lomechusa dentata. Grav. 



Fam. XII. PsELAPiiiD.E. Leach. 



Dimera. Latrcille. 



E/i/tra abbreviated : tarsi with three articulations : claws monodactylc, 



" Latreille supposed that these animals had but t\vo joints to their 



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



optera; observing, however, that they are alUed to Aleochura, to 



whose family they are even referred by Rirby." 



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

 situation is intermediate between the Staphylinida and Scydmanida:, 

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

 from either by the structure of their claws, and from the latter also 

 by their abbreviated elytra. 



In the third volume of the Zoological Miscellany is given an ex- 

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

 merated nineteen British species, five of which are nev.-, and none of 

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

 cies in his Entomologia Britannica. 



1. Antenna zcith elevenjoints. Maxillary palpi elongated. 

 Stirps '[.'—Body elongated and depressed. 



