The Scottish Naturalist. 



225 



10. 



Dark test. E. very parallel in fr. %. H. wide and short. 



H. and th. (exc. on disc. ) thickly punc. E. with 



rows of puncs. and finer rows between. 1% 1. E. s - 

 Test. Sides gently rounded. H. , and th. (in fr. and 



behind), strongly punc. E. with rows of puncs., 



and finer rows between. 1% 1. E. s - 



Brychius. 

 Th. with a mar. fold on each side. E. p.-s., clouded 

 with b. The fr. part of the 3rd int. and the hi. part 

 of sut. strongly elev. 1 % 1. B. . 



mucronatus 



cmereus 



elevatus 



Second Family— PELOBIID^E. (1 genus) Pelobius. 

 Dull reddish. Thickly punc. Th. at ba. and in fr., 



2 marks on h. , and disc of e. , b. 4^ 1. E. 



Third Family— HYDROPORID.E. (3 genera) 



1. Ap. of e. prod, in a consp. and very sharp point. 



Not as above. ...... 



2. Claws of post. tar. unequal ; the in. claw fixed. 



- - - - equal, moveable. .... 



OXYNOPTILUS. 

 Punc. Reddish brown. Th. darker in mid. Each e. 

 with the mar. and two indist. bands paler. I % 1. 

 E. s,c * ...... 



Hyphydrus (1 species) and Hydroporus. 



1. Forehead with an elev. mar. in fr. (Body globose). 



- simple. R. -m. of e. with a mar. pit at should, to 



receive the ba. end of the mid. tib. 



- -. - - -simple. On each side a furrow at ba. of th. 

 is continued on the e. 



--. - - - -. on th. runs parallel to the 



mar., but is not continued on e. 



- -. - - - -. No dist. furrow on th. E. test., with 



dist. dusky lines or spots, or vice versa. 

 Not belonging to any of the above groups 



2. Less than \%\. Body dist. globose. H., th. and e. 



punc. ...... 



More than i%\. Body very globose. R. -brown; e. 

 darker. Irreg. punc. , with mingled large and small 

 puncs. E. often with obsc. pale lines and blotches. 

 S shining, $ dull. i]/i 1. B. . 



3. A well def. and consp. pale line close to sut. runs from 



near ba. to ap. of each e. • . 

 This line is wanting, at least on disc. 



4. H., th., an. and legs pale brown. Ap. of an. and ba. 



and ap. of th. often dusky. E. b. ; the irreg. mar. , 

 and 2 lines (joined in fr. and behind, not reaching 

 ba. ) test. These lines meet the pale mar. in fr. and 

 behind, and an irreg. fasc. joins the out. one to the 



Hermanni 



Oxynoptilus 



2 



Hyphydrus 



Hydroporus 



cuspidatits 

 2 



6 



9 

 11 



17 



22 



Hyphydrus 

 ovatus 



4 

 5 



