Deronedes.'] adepiiaoa. 171 



D. assimilfs, Payk, Oblong oval, rather convex, covered wilh very 

 thick and short yellowish pubescence, rather dull ; head testaceous with 

 the extreme hinder margin black ; thorax testaceous with anterior mar- 

 gin narrowly and posterior margin with two patches on each side of 

 middle black, basal margin plainly broader than anterior margin ; elytra 

 testaceous, with six dark lines on each which do not reach apex and, as 

 a rule, cease before base, the sixth abbreviated and broken up into patches ; 

 elytra with a sharp tooth on margin near apex ; upper surface very 

 closely and thickly punctured ; underside ferruginous or fuscous ; front 

 and middle tarsi broad in both sexes, but more especially so in the male. 

 Long. 4-^-, lat. 2i- mm. 



Ponds and ditches inland and near tlie sea ; somewhat local, bat widely distributed 

 tbi-ouiihout England from Northumberland to Devonshire, but rare apparently in 

 the south, and near London ; the only record in the London district appears to be 

 Keigate Heath (Brewer) ; I have found it commonly at Mabletborpe, Lincolnshire, iii 

 a ditch not far from the coast. Scotland, local, Tweed, Forth, Tay, Moray. 



A variety of this insect is described by Mr. Eye in Ent. Mo. IMag. xii. 

 175, taken by Mr. Horace Francis, of Lee, at Keswick, Cumberland ; 

 this is smaller with only the tip of the apical joint of the antennse dark, 

 and with the thoracic dark spots absent in the male, and only indicated 

 in the female ; the colour, however, of the species is occasionally variable, 

 although more constant than in many others. 



D. depressus, F. Oblong oval, with very short and thick pubes- 

 cence, somewhat dull ; head, except extreme hind margin, testaceous ; 

 thoiax testaceous with anterior margin very narrowly dark, and posterior 

 margin with two black patches as in the preceding species ; elytra testa- 

 ceous with dark lines which are most usually entirely or almost entirely 

 confluent, and form a sort of broad latlice-work pattern ; the colour, how'- 

 ever, is very variable ; sometimes the whole of the disc of the elytra is 

 dark, having only the margins light ; the small distinct tooth on margin 

 near the apex is a character that will at once distinguish it from the suc- 

 ceeding species, which it much resembles; punctuation of upper surface 

 very line ; underside reddish or reddish testaceous ; the male has tlio 

 anterior and intermediate tarsi broader than the female, and the thorax 

 almost w'ider than base of elytra, whereas in tlie female it is distinctly 

 narrower. Long. 4-^-, lat, 2| nun. 



Running water; widely distributed tlirmighout England and Wales; Scotland, 

 common, as far north as the Moray district; Ireland, Armagh, Dublin, &c., and 

 probably common, 



I>. duodecim-pustulatus, Fab, Very closely resembles the 

 ]n<'(L'ding in general apjuarance and markings, but with the anterior 

 margin of thorax more liroadly dark, and clytral dark markings still more 

 confluent ; it is also a much larger insect, and the sides of thorax and 

 elytra are more strongly rounded ; it is easily distinguislie*! also by tlie 

 absence of the small tooth near apex of elytra ; underside reildisli 

 testaceous, sometimes infuscate ; male with the anterior and inter- 



