196 ADEPHAGA. [Agahus. 



Ponds, &c. ; widely distributed and not uncommon in stagnant water in England 

 and Wales and in Scotland; Ireland, near Belfast and Armagh, and probably 

 common. 



Group XIX. 



Coxal lines in their anterior part but little directed outwards ; prosternal 

 process rather broad but always compressed ; wings of metasternum large 

 or moderate. 



A. chalconotus, Panz. Oval, rather depressed, upper side blackish 

 bronze, with the sides of thorax and elytra sometimes very narrowly 

 rufescent ; mouth and two spots on vertex more or less obscurely red; 

 under side black, abdominal segments reddish behind ; antennae red, apex 

 of last joints dark ; anterior and intermediate pairs of legs red, femora 

 pitchy, posterior pair entirely pitchy ; upper surface finely and thickly re- 

 ticulate; male with the three basal joints of front and middle tarsi slightly 

 thickened and apical ventral segment rugose towards apex especially on 

 each side of the middle ; size very variable. Long. 6-8, lat. 3|-4|- 

 mm. 



Ponds, &c. ; common and widely distributed from Newcastle to Dartmoor, and from 

 Swansea to the London district ; Scotland, rather common as far north as Morayshire ; 

 Ireland, near Dublin and Belfast. 



Group XX. 



Coxal border very wide ; the coxal lines gently, not abruptly turned 

 outwards at the extremity ; prosternal process punctulate, slightly raised 

 along the middle. 



A. melanarius, Aube (tarsatus, Zett.). Oblong oval, rather shiny 

 (the male more so than the female), somewhat depressed, black with a 

 slight Eeneous reflection which is, as a rule, hardly perceptible ; antennae 

 red • le^s pitchy ; head with two obscure red spots on vertex ; each 

 elytron with an obscure reddish dash on margin near apex ; upper surface 

 strongly and plainly reticulate, the meshes of the reticulation taking no 

 definite direction ; this character, together with its larger size and more 

 shining appearance, separates it from A. striolahis^ which it most closely 

 resembles ; male with the three basal joints of the anterior and middle 

 tarsi slightly thickened. Long. 9, lat. 5 mm. 



Very rare ; a single specimen in Dr. Powei-'s collection taken in the Orkneys by 

 Mr. Svnie; Mr. Bold in his catalogue records a specimen from Long Benton, North- 

 umberland, but I have not seen the insect, nor do I know of any person who has 

 verified it. 



A. bipustulatus, L. Oval, not very convex, black, upper surface 

 sometimes with a very slight metallic reflection, very strongly reticulated, 

 the meshes narrow and at all events at base taking a distinctly longi- 

 tudinal direction ; antennae and palpi red, apex of last joints of former 

 often darker ; legs pitchy, the anterior pair lighter ; male with the three 

 basal joints of the anterior and intermediate tarsi thickened, the claws 



