PERLIDES. 183 



Sub-div. 2. 

 Prolhorax punctis elev;ilis lineas distinctas non fingentibus. 



16. NeMOUHA imUNNEA, 



Nemoura bruunea, Piclet, Hist. Nat. Near. Perl. 380, 13, pi. 4t>, i 

 10—12. 



Germany. 



Div. ? 



17. Nemoura fusca. 



Leuctra fusca, Curt. 



a, b. England. 



c, d. Dartmoor. From Dr. Leach's collection. 



18. Ne3[0URA feuruginea. 



Fusco-ferruginea^ nitens ; caput thorace ^laullo latius ,• scutum an- 

 tice latius ; alee suhkyaliruB. 



Brownish ferruginous, shining : head a little broader than the 

 thorax : antennae pale ferruginous, minutely pubescent : scutum 

 minutely rugulose, with a slight longitudinal furrow, broader in 

 front ; sides slightly convex ; angles somewhat rounded : wings 

 subhyaline ; veins brownish ; external basilar areolet and terminal 

 areolet with no transverse veins ; submedian areolet with about eigbt 

 transverse veins. Length of the body 1| line ; of the wings 6 lines. 



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



19. Nemoura minima. 



Nigra, nitens ,- caput thorace latius. 



Perla minima, Barnston, MSS. Newport, Pruc. Linn. 6'oc. Luml. 

 (1848), i. 388, 2. 



Black, smootli, shining, slender : head broader than the tho- 

 rax : antennae very minutely pul)escjnt, shorter tlian the body : pro- 

 thorax sulxiuadratc, not broader in front ; sides straight ; angles 

 sharp : wings hyaline ; veins l>lack ; external l)asilar areolet with 

 one transverse vein ; terminal areolet with no transverse veins ; in- 

 ternal basilar areolet and terminal areolet with no transverse veins ; 

 submargiual region divided bv a single upright transverse vein : 



R 2 



