344 



The Scottish Naturalist. 



2. 



Hydr^ena. 



I. E. each with about 10 well def. rows of puncs. 



- - - only about 6 well def. raws of puncs ; the puncs. 

 near mar. not forming rows. 



E. with rows of fine puncs. ; ints. not sharply elev. Th. 

 dist. tr. ..... 



Narrow el. D. with rows of very large deep puncs. ; 

 the ints. very narrow and sharply ridged. Th. not 

 dist. tr. , thickly and unif. puna H. dusky ; th. 

 dusky pale at fr. and ba. E. dull test. Legs, pal. , 

 and an. , test. I 1. B. . 

 Less than I 1. . 

 Not less than I 1. 



Short, broad ; e. almost twice as wide as th. Th. thickly 

 puna on sides, more spar, on disc. B. or pit. E. 

 often brown. Pal., an., and legs, test. $L B. N 



Narrow el. ; e. dist. less than twice as wide as th. 

 Th. thickly and unif. puna H. b. Th. dusky, fr. 

 and ba. test. E. pale. Pal. , an. , and legs pale. 

 V 1. E. N . 



Not very narrow ; e. dist. less than twice as wide as th. 

 Th. thickly puna ; often a little less so on disc. H. 

 dusky. Th. dusky, often paler at fr. and ba. E. 



pit. or brown. 

 E.S.L! 



Pal., an., and legs, pale, \y% 1. 



Very like prec. Gen. of a paler color. Consp. longer, 

 narrower, and more parallel. E. very little wider 

 than th. ; more than twice as long astogether wide. 



ij^l. E.S.L . . ." 



6. The rows of puncs. on e. reach the ba. 



are dist. only on disc. Th. puna , gently 



tr. H. dusky. Th. dusky, fr. and ba. test. E. 

 test, brown ; sut. pit. Pal., an., and legs, test. 

 7/& 1. B. N . 



7- Ap. j. of pal. with a consp. blunt tooth on in. side. 

 Legs of 6 simple. Th. gently tr., thickly puna exa 

 on disc. E. rather parallel, hardly wider than th. 

 Shining brown. H. and (often) disc, of th. darker. 

 Pal., an., arid legs, test. ^ 1. B. N 



- - - - simple. Fern, of <J thickened. Hi. tib. of 6 

 with a bunch of hairs. Th. not tr., with a very 

 deep fov. on each side, puna thickly on sides, spar. 

 on disc. E. very parallel, toothed at ap. \ l /i 1. 

 B * 



Legs of <J simple. Th. tr., much narrowed 



behind, spar, puna on disc, hardly puna on sides, e. 

 (with rounded sides) cons, wider than th. Mars. 



6 



3 



testacea 

 4 

 5 



nigrita 



palustris 



riparia 



angustata 



pulchella 



atricapilla 



gracilis 



