192 ADEPHAGA. [A<jaJ>ilS. 



A. ulig'inosus, L. (dispar, Bold). Oval, convex, shining, upper 

 surface In-onze l)lack ; head with two obscure spots on vertex reddish ; 

 thorax and elytra with margins narrowly red, base of latter occasionally 

 lighter than disc ; thorax strongly margined ; elytra short and broad, 

 narrowed towards apex but not acuminate ; underside black, abdominal 

 segments more or less reddish behind ; legs red ; female dimorphic, 

 one form being like male, the other very thickly reticulate and quite 

 opaque and dull ; male wath the front tarsi considerably thickened, claws 

 of front feet short, anterior one thickened so as to appear dentate in 

 middle. Long. 7, lat. 4^ mm. 



Very local ; ponds in bogs, &c. ; Askham Bog, near York, not uncommon ; North- 

 nraberland district, Boldon Flats, &c., in some numbers ; recorded by Murray from 

 Edinburgli and Aberdeenshire, but Dr. Sharp considers it very probable that in- 

 dividuals of A. congener may have been mistaken for it ; the dull variety of the 

 female appears to be confined to Britain : it is not uncommon at Askham Bog. 



This species may at once be distinguished from its allies by its shorter, 

 broader, and more convex form : it somewhat resembles A. femoralis at 

 first siglit, l:)ut that insect is much more parallel-sidod, more depressed, 

 and quite difl'erently sculptured. 



Group YIII. 



Male with a series of striiB forming a stridulatory organ on each side 

 of the third abdominal segment ; prosternal process rather narrow, very 

 little compressed, nearly smooth or feebly punctate ; wings of mota- 

 sternum moderately large. 



A. affinis, Payk. Oblong oval, rather depressed on centre of disc, 

 bronze-black, shining, very finely reticulate ; elytra with a longitudinal 

 patch near margin just behind middle and a spot near apex testaceous 

 red ; these markings are very obscure, and are often quite obsolete ; an- 

 tennae and legs red, femora more or less pitchy ; anterior claws of male 

 with a sharp tooth ; the sculpture of the sexes is almost identical. 

 Long. 65-, lat. 3 1 mm. 



Very local ; only taken near Dumfries, where it has been found by Dr. Sharp, and 

 Bubsequeully by Mr. Lennon in some numbers. 



A. ung-uicularis, Thorns. Extremely like the preceding, but less 

 parallel (the sides of the thorax behind and of the elytra being more 

 rounded) ; the general colour is more brassy, and the broad turned-under 

 margin of the base of the elytra is obscure red, whereas in offinis it is 

 quite black ; there is also some difference in the size of the wings of the 

 metasternum, but quite insufiicient to warrant their being placed in 

 two different genera, as is done by Thomson, who places unguicularis 

 under Eriglenus, and afflni!< under Gaurodytes, relying chiefly on this 

 character, which is a very unsatisfactory one except in extreme cases. 

 Long. 6 J, lat. 3 1 mm. 



Widely distributed, although local ; ponds, &c. ; London district, Lee, &c. ; York . 



