Aija/nis.] ADEr-iiAGA. 191 



very much ; the species, as a rule, is larger, more convex, and more 

 shilling than the preceding, and has the elytral spots less distinct : the 

 toothed anterior claws of the male will also serve to distinguish it. 

 Long. 9, lat. 4^ mm. 



Kuiiuiiii,' stroaras ; local, although widely distvibuted ; Maidstone; Dartmoor; 

 Bristol; IJangoUeu; Isle of Man; Hartlepool; Northumberland district ; Scotland, 

 local, Tweed, Forth, Moray. 



This species is one of the most widely distributed of the Agahi, 

 ranging over Central and Southern Europe to JS'orth Africa and Central 

 Asia witli innumerable variations of sculpture, and considerable differences 

 of colour. 



A. paludosus, F. Oval, rather convex, very smooth and shining ; 

 ht'dd dark with front and two spots on vertex red, antennae testaceous 

 red ; thorax dark with borders red ; elytra brownish yellow or castaneous 

 with the sides and base lighter ; posterior legs pitchy, anterior and inter- 

 mediate ones red with femora pitchy in middle ; no sexual differences of 

 sculpture ; male with the basal joints of the front and middle tarsi a little 

 thickened. Long. 7, lat. 4 mm. 



Widely distributed, and not uncomuion, although local ; generally in running water, 

 but not always ; it occurs throughout the country from Northumberland to Devou- 

 shire, and from South VVales to the London district ; Scotland, rather scarce, but 

 widely distributed in the Tweed and eastern districts ; it ajjparently does not occur 

 iu the Solway and western ones. Ireland, Cork, and near Belfast. 



Group IV. 



Characters similar to those of the highly developed members of the 

 preceding group, except that the swimming legs are strongly developed, 

 being short and thick ; one species only is contained in the group. 



A. brunneus, F. {ferrugineus, Steph.). Oval, 'broad, convex, 

 smotith and very shiny, outline of thorax and elytra continuous ; 

 underside black (except of head and thorax), upper side castaneous, with 

 obscure markings occasionally on head and thorax, elytra somewhat 

 light L-r at sides and base ; legs red, all the femora in middle, and pos- 

 terior tiljicC pitchy ; female apparently dimorphic, one form being much 

 more plainly reticulated and duller than the male : Dr. Sharp does not 

 notice this fact, but there are several of the duller forms in Dr. Power's 

 collection. Long. 9, lat. 5i mm. 



Very rare; taken originally (according to Stephens, Mand. ii. 79) by Dr. Leach in 

 Soiuii Devon; rediscovered by Ur. Power iu June 18G2 in the Xew Forest, in ii 

 stream Ui-ar Lyudhurst, where it was afterwards taken by Charles Turner iu some 

 numbers. 



Group YII. 



Iliiul coxa? small, wings of metasternum large, bind tarsi feeble; no 

 abdominal tile ; prosternal process in our single species moderately l>roatl, 

 feebly punctate (in some of the other species of the group it is quite 



.smootii). 



