PERLIDES. 183 



Sub-div. 2. 

 Pro thorax punctis elevatis lineas distinctas non fingentibus. 



16. NEMOURA BBUNNEA. 



Nemoura brunnea, Pictet, Hist. Nat. Neur. Perl. 380, 13, pi. 49, f. 

 1012. 



Germany. 



Dir.? 



17. NEMOURA FUSCA. 

 Leuctra fusca, Curt. 



a, 6. England. 



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



18. NEMOURA FERRUGINEA. 



Fusco-ferruginea, nitens ; caput thorace paullo latins ; scutum an- 

 tice latins ; alee subliyalince. 



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 eight 

 transverse veins. Length of the body If 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, Proc. Linn. Soc. Lond. 

 (1848), i. 388, 2. 



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

 rax : antennae very minutely pubescent, shorter than the body : pro- 

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

 sharp : wings hyaline ; veins black ; external basilar 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 by a single upright transverse vein ; 



R 2 



