Insects. 4857 



2. L. hyalinus, Beg., Erich., Steph. L. minutus, Marsh, Steph., 

 Aube. L. obscurus, Pa?iz. Long. 4f ; larg. 2§. 



(L. testaceus, Aube. Long. 5; larg. 3. Broader and more convex 

 than L. hyalinus; without the longitudiual markings on elytra which 

 distinguish L minutus. France, &c.) 



(L. variegatus, Germ., Sturm. Long. 4 ; larg. 2|. At once known 

 by the broad luteous transverse bands on elytra, interrupted at the 

 suture ; one a little removed from the base, the other behind the 

 middle. France.) 



Genus Hyphidrus. 



1. H. ovatus, Linn. $, Steph., Erich., Aube. D. ferrugineus, Linn. 

 9, Don. H. ovalis, Fab., Gyll. $. II. gibbus, Fab., Gull. ?. 



Var. H. variegatus, Steph. 



(H. variegatus, Illig., Dej. Long. 4 J ; larg. 3. Size of H. ovatus: 

 at once distinguishable by its markings on elytra. France.) 



Genus Cnemidotus. 



1. C. caesus, Dufts., Gyll., Steph., Aube, Erich. C. impressus, Panz. 

 Near London; Fen districts, Northampton, &c. 



(C. rotundatus, Aube, Fairmaire. Long. 3f; larg. 2. Distinct 

 from C. caesus by brighter colour, form broader and more rounded, 

 punctuation more deep and distinct. France.) 



Genus Hydroporus. 



1. H. inaequalis, Fab., Gyll. Hygrotus reticulatus, Steph. Long. 3; 

 larg. 2. 



2. H. reticulatus, Fab., Gyll., Erich., Aube. Hygrotus collaris, 

 Fab., Steph. H. affinis, Steph. III. Long. 3j ; larg. 2. 



(H. quinque-lineatus, Zett. Long. 3j ; larg. 2. Allied to H. reticu- 

 latus, which it resembles in size, form and maculation ; it differs in 

 punctuation ; in H. reticulatus the elytra are densely covered with 

 fine punctures interspersed with others deep and decided: in 5-lineatus 

 the surface of elytra is covered with deep punctures. Lapland.) 



3. H. decoratus, Gyll. Near York ; Norfolk ; near London ; 

 Northamptonshire. Long. 2 J ; larg. If. 



(H. cuspidatus, Kunz., Germ. Long. 3 ; larg. 2. Short, ovate, densely 

 punctured, shining, ferruginous or brown ; thorax ferruginous, slightly 

 darker on anterior and posterior margins; external margin of elytra 

 and two transverse irregular bands dark brown ; apex lengthened into 

 a point. France, Italy, Germany.) 



