4866 Insects. 



anterior margins of a dark brown colour, which meets sometimes in 

 the middle of the disk.) 



43. H. granulans, Fab., Gyll., Steph., &c. Long. 2^ ; larg. 1 J. 

 Common. 



44. H. geminus, Fab., Gyll., Steph., &c. H. pusillus, Fab. 

 Long. 2j ; larg. 4. Common in shallow muddy water in the 

 Fen districts. Wimbledon Common, Coombe Wood, Gosforth. 



(H. varius, Dej. Long. 2j ; larg. lj. Black, slightly pubescent; 

 margin of thorax ferruginous; elytra ferruginous, with base, band 

 along suture dilated on either side at the middle, and again near apex, 

 black ; on the shoulders a black mark, and another oblong one on the 

 disk, bounded by a narrow line along the margin of elytra. France, 

 Germany.) 



45. H. unistriatus, ///., Oliv., Steph. H. parvulus, Payk., Gyll. 

 Hyg. bisulcatus, Curt. Long. 2| ; larg. 1£. A rare species ap- 

 parently : one specimen near Cambridge ; Devonshire ; occasionally 

 near London. 



(H. bicarinatus, Clair v. Hyph. costatus, Gyll. Long. 2| ; larg. 1 J. 

 Broader than H. unistriatus, markings somewhat similar, but more 

 testaceous in colour. France.) 



(H. pumilus, Dej. Long. 2} ; larg. 1J. Broader than H. unistriatus, 

 markings somewhat similar, but more testaceous in colour; distinguish- 

 able from H. bicarinatus by sides of the thorax somewhat more 

 rounded, anterior and posterior margins more broadly black ; this 

 colour hardly reaches lateral margins. France.) 



46. H. minutissimus, Germ., Aube. H. trifasciatus, Woll. Long. 2; 

 larg. \. This at present is exclusively an Irish species: it was 

 taken some years ago in the rivers near Cork by the late Mr. Clear; 

 and described by Mr. Wollaston as H. trifasciatus in the * Annals of 

 Natural History. 1 The species is not uncommon in France and other 

 countries, and may probably be detected again by any one who will 

 search the Cork district. 



Genus Haliplus. 



1. H. elevatus, Panz., Gyll., Steph., Aube, Erich. Rather a local 

 insect: running streams near Bexley ; sparingly in the reservoir near 

 Daventry ; Ouseburn and Boldon ; Mr. Newman takes it in the canal 

 at Leominster ; also occasionally in Scotland. 



2. II. mucronatus, Steph. H. parallelus, Bab. H. badius, Aube. 

 Long. 4] ; larg. 2,^. We know but little of this insect: Aube took 

 it very abundantly in September. Compiegne. 



