34Q 



The Scottish Naturalist. 



Scarborough 



the 2nd, 4th, and 6th ints. 1% L 

 and Manchester ..... 

 Not as above. A short punc. str., or row of puncs., 

 at ba. of e., between 1st and 2nd str. 



- - -. The str. unif. at ba. .... 



*. Alt. ints. of e., and a ridge beside the short str., elev. 

 into sharp high keels. .... 



- - - - at most gently conv. .... 



3. Broad. H. and th. test. r. E. test. yel. Pal., an. 

 and legs reddish. E. more or less spotted with b. 

 H. and th. gran. Mars, of th. elev. and serr. 



irreg. 

 2^1 



dusky, 

 in str. 



furrows and 

 B. 



Th. with 6 

 of e. not so 



4. H. 



Surface of th. with numerous 

 ridges. E. very strongly p. -s. 

 Resembles prec. Narrower. H. 

 less irreg. longi. ridges. Puncs. 

 large. i|l. B. 



and th. cop. or gr., closely and consp. granulose. 

 Th. with a welldef. furrow in the centre, and two on 

 each side, besides an irreg. furrow along the side 

 mars. The mar. furrow is not well def. and is of 

 uneven width. The sides of the th. are rounded in 

 fr. and contr. behind the mid., making the th. 

 appear cordate. An., pal., legs, and e., test. E. 

 with some b. marks. Behind the ba. the e. are 

 transversely impressed ; they are p.-s., and the ints. 

 are gently conv., the alt. ints. most so. The r.-m. 

 of the e. is narrow. The fr. tib. have a fringe of 

 bristles on their ex. mar., in which several bristles 

 are very consp. larger than the rest. The 2nd 

 (longest) j. of the hi. tar. is less than twice as long 

 as the 3rd. The ap. of the last seg. of the h. -b. is 

 minutely serrated on theu.-s. 3-3K *• E.S.I. . 



Very like prec. Smaller and often darker in colour. Th. 

 with sides less rounded in fr. and less contr. behind, 

 its surface less closely granulose. E. with the tr. 

 impression less dist. The alt. ints. of the e. are not 

 dist. more elev. than the rest. Hi. tar. with 2nd j. 

 about twice as long as 3rd. The fringe on the fr. 

 tib. is nearly unif., and the ap. of the last seg. of 



h.-b. is smooth. 



2^-3 L 



E.I. 



Resembles aqiiatictts. Mar. furrow on th. wide consp. 

 and unif. (as wide as ints. of str. on e. ) Sides of th. 

 gently and unif. contr. backw. from in fr. of mid. 

 Alt. ints. ofe. consp. elev. R.-m. of e. wide, (the 

 space beyond the last str. being as wide as the prec. 

 ints.) z]/z 1. E. 8C - .... 



Spaces between the furrows on th. dist. gran. . 

 These spaces not dist. gran., shining; the furrows nearly 



tuberculitus 



2 



5 



3 



4 



rugosus 



nubilus 



aquaticus 



aequalis 

 Thorns. 



intermedius 

 6 



