306 



The Scottish Naturalist. 



Hydrous. 



Very minutely punc, shining. B. or bl.-b. Legs, 

 an., and (often) fr. legs, more or less reddish. E. 

 with 4 rows of large puncs. Ap. j. of fr. tar. 

 of<$dil. 7| 1. E. .. 



caraboides 



Hydrobius. 



A short wide species. B. or brassy b. Legs (more or 

 less), pal. , and ba. of an. , r. Thickly punc. On e. 

 io consp. punc. str., which are faint in fr., very deep 

 behind. An obsc. row of large puncs. on alt. ints. 



Very like prec. Longer. Narrower. The punc. str. 

 on e. are represented by mere rows of puncs. 4 1. 



E B.C. 



fuscipes- 

 oblongus 



Helochares. 



Rather flat. Wide behind. Minutely and thickly 

 punc. ; more spar, behind. Faint traces of rows of 

 larger puncs. on e. H. and th. test. E. test., 

 more or less dusky on disc. Pal. , legs and an. test. 

 Extreme ap. of ap. j. of pal. dusky. 2^ 1. E ! . 



Very like prec. More unif. test, brown. More of ap. 

 j. of pal. dusky. Rather strongly and very unif. 

 punc. 2\ 1. B. 



lividus 



punctatus- 



Philhydrus. 



1. H., th. and e. test, (chiefly). Last j. of pal. not consp. 



dark. Not less than 2% 1. ... 



Not as above. Sut. (especially behind) broadly b., in 



dist. contrast to the brownish e. . 

 Not as either of the prec. groups.- 



2. Test. H. (behind), disc, of th. (often), cl. of an., 2nd 



j. of pal. , and some obsc. clouds on e. , dusky or b. 

 Einely and closely punc. , with very obsc. traces of 

 rows of larger puncs. on e. 2^ 1. E ! 

 Very like prec. Narrower. More shining. Not 

 quite so finely and thickly punc. CI. of an. lighter. 

 H. only a little dusky at ba. Pal. unic. test. E. 

 with the rows of puncs. more dist. 2^. E c - 



3. Rather el. Not very closely punc. H. b. ; 2 pale 



spots in fr. Th. test.; dusky about mid. and ba. 

 E. (exc. sut.) brown. Pal. test.; 2nd and 4th js. 

 often a little darker. An. brown ; test, at ba. 

 Fern. b. Tib. lighter. Tar. test, iji 1. E. S. I. 

 Resembles prec. Rather more thickly punc. H. un- 

 spotted. Pal. with 1st and 3rd js. dull red ; 2nd 

 and 4th pit. b. \V 2 1. B. 



4 



testaceus 



mantimus- 



suturalis 



marginellus 



