Insects. 4851 



sides of thorax not so rounded; the yellow transverse band of the 

 thorax narrower. France, Austria ; probably in other northern 

 countries of Europe.) 



2. H. cinereus, Payk. 9 Gyll., Curt., Steph. Long. 14 — 15 ; larg. 

 8 — 8 J. By no means common. Cambridge and Huntingdon Fens. 



(H. bilineatus, Deg., Payk. Long. 15 ; larg. 9 — 9j. Closely allied 

 to H. cinereus ; to be distinguished by flatter body, and by broader 

 band on thorax. North of Europe.) 



(H. zonatus, Fab., Panz., Dej. Long. 14 — 15; larg. 8 — 8J. 

 Allied to H. austriacus and H. cinereus: it differs slightly in form, 

 and especially in the disposition of the black transverse bands on 

 thorax, which leave the anterior and posterior margins yellow. 

 North of Europe.) 



(H. verrucifer, Sahib. Long. 14 — 15; larg. 8 — 8£. May be re- 

 cognized at once by the peculiar striae on the thorax all converging 

 to its centre. Finland ; Lapland.) 



3. H. Hybneri, Fab., Oliv., Sch. Not common. Whittlesea 

 Mere and Yaxley are the only localities in which I have taken it; 

 Mr. Hope has found it at Netley ; Mr. Newman has taken it at Cam- 

 berwell and Lee. 



4. H. transversalis, Fab., Panz., Steph. Though not abundant, the 

 most common species of the genus. Cambridge, Norfolk, Whittle- 

 sea. It would seem that no representative of this genus has been 

 detected either in Scotland or Ireland. 



Genus Colymbetes. 



1. C. fuscus, Linn., Fab., Gyll., Sturm, Steph. C striatus, Aube, 

 Steph. Man. C. Paykulli, Steph. Man. Long. 16—18 ; larg. 8—9. 

 Common. 



(C. striatus, Linn. C. Bogemanni, Aube, Gyll. Long. 17 — 18; 

 larg. 8 — 8J. With other distinguishing characteristics, the trans- 

 verse striae of elytra sufficiently designate this species. North of 

 Europe.) 



(C. dolabratus, Payk., Gyll. Long. 15 — 16; larg. 1\ — 8. Hardly 

 distinct from C. striatus; it is always smaller, relatively narrower; 

 not dilated behind the middle. North of Europe.) 



2. C. pulverosus, Steph., Sturm, Erich. C. conspersus, Gyll., 

 Aube. Apparently more common near London than in any other 

 district. 



3. C. notatus, Fab., Gyll., Steph., Aube. This insect sometimes 

 occurs in considerable numbers in the fen districts ; Wandsworth 



