PERLIDES. 191 



Nemoura putata, Newm. Em. Mag. v. 401. 

 Scotland. 



50. NEMOURA ALBIDIPENNIS. 



Ferruginea, nitens ; caput thorace multo latins ; scutum antice vix 

 latins, angulis sat acutis ; alee albidce. 



Ferruginous, shining : head much broader than the thorax : 

 antenna? pubescent : scutum minutely rugulose, with an indistinct 

 longitudinal furrow, hardly broader in front ; sides almost straight ; 

 angles rather sharp : wings whitish ; veins very pale testaceous ; 

 external basilar areolet with no transverse veins ; terminal areolet 

 with one transverse vein ; submedian areolet with six or seven trans- 

 verse veins. Length of the body 2 lines ; of the wings 6 lines. 



a. Nova Scotia. From Lieut. Redman's collection. 



51. NEMOURA PERFECTA. 



Nigra, nitens; caput thorace multo latins; scutum ferrugineum, 

 rugulosum ; pedes testacei, femoribus basi nigris ; alee hya- 

 lince, anticce fusco-nebulosae. 



Black, shining : head smooth, much broader than the thorax : 

 antenna? blackish, minutely pubescent: prothorax mostly ferrugi- 

 nous, minutely rugulose, much broader in front ; sides almost 

 straight; -angles rather sharp: legs testaceous; femora, especially 

 the hind pair, black towards the base and at the tips ; tibiae and 

 tarsi blackish at the tips : wings hyaline ; fore-wings clouded with 

 brown near the tips and about the transverse veins in the disk ; 

 veins black. Length of the body 2 lines ; of the wings 5 lines. 



a. Nova Scotia. From Lieut. Redman's collection 



52. NEMOURA COMPLETA. 



Nigra, gracilis, nitens ; caput thorace multo latins, macula testa- 

 cea; prothorax rugulosus ; pedes ferruginei ; alee hyaline, 

 anticce fusco bifasciatce. 



Black, slender, shining : head much broader than the thorax, 

 with a large testaceous spot between the eyes : antennae minutely 

 pubescent : prothorax minutely rugulose, with a slight longitudinal 

 furrow, not broader in front ; sides almost straight ; angles rather 

 sharp : legs ferruginous : wings hyaline ; fore-wings with a distinct 



