SfennIo])hus.] adepiiaga. 37 



legs reddisli tostaceous, femora darker at apex. Tlie colour of this insect 

 is variable ; occasionally a variety occurs with immaculate elytra. 



Rare ; salt marshes, under stones and in flood refuse. Banks of Tliames towards 

 Gravescnd and Slie])py (Dr. Power); Sheerness (Mr. Douglas, Mr. S. Stevens, and 

 ]\Ir. J. J. Walker); Deal (Mr. W. West). 



S. vespertinus, Pauz. {iirirf /(.•<, Ilerbst.). Eather variable in colour, 

 soiui'tiiues l)ru\vn-l)lack, sometimes partly or almost entirely testaceous ; 

 head always black or dark, antenn?e dark with tlie first joint only testa- 

 ceous ; thorax usually dark with yellowish margins, more quadrate and 

 Avith the posterior angles less rounded than in S. SIiTunshira7ius ; basal 

 fovepe broader and more distinctly punctured than in either of the pre- 

 ceding species ; elytra variable but usually dark with cyaneous reflection, 

 with margins and space at shoulder more or less testaceous ; underside 

 lilack, legs pale testaceous. L. 5| mm. 



Local; in niavsliy places; Whittlesea Mere; Norfolk; Sussex; Wimbledon; 

 Chatham; Lee, Kent; Sheerness; Weybridge ; Shipley, near Horsham; Ton- 

 bridge; Deal. Ilecorded by Bold among the Coleoptera of Northumberland and 

 Durham. 



ACUPAZiPUS, Latreille. 



The insects that form this genus are among the smallest of the Cara- 

 bidse ; they are very often united with the true Stenolophi ; it would 

 seem, however, better to separate them on the formation of the anterior 

 tarsi of the male ; in habits they resemble the members of the preceding 

 genus. 



The genus Acupalpus contains about as many species as the genus 

 Stenolophus : they are very widely distributed over the Old and New 

 Worlds, reaching as far north as Siberia and as far south as Caffraria, 

 Chili, and Patagonia ; there are about fifteen European species. 



I. Posterior angles of thorax blunt or rounded ; 



abdomen glabrous. 

 i. Thorax uniformly reddish yellow ; posterior 



angles rounded ' A. FLAVICOLLIS, Slurm. 



ii. Thorax testaceous with dai'ker disc more or less 



defined, but very variiible in colour. 



1. Thorax not narrowed behind ; posterior angles 



rounded ' . A. dobsalis, F. 



2. Thorax narrowed behind ; posterior angles 



hlunt ^ . A. EXIGUrs, v. luridits, DeJ. 



iii. Thorax entirely dark. 



1. Elytra nnicolorous pitch black. 



A. Thorax distinctly narrowed behind with 



basal impressions smooth ; length 2.V mm. A. EXIGUUS, DeJ. 



B. Thorax with anterior and posterior margins 



of cijual breadth, basal impressions broad, 



punctured ; length 3-3A mm A. brunmi'F.s, Shirm. 



2. Elytra black, with base and suture yellow . A. mkbidiaxus, L. 



II. Posterior angles of thorax right angles ; abdomen 



finely pubescent \. CONsruTrs. Dt(ff. 



