554 EPHEMEBIN^E. 



18. PALINGENIA NEBULOSA. 



Niger; abdomen piceum, subtus fulvum ; setce testacecB^fusco faa- 

 ciatce, corpore plus duplo longiores ; pedes fulvi, antici ob- 

 scuriores longissimi ; alee limpidce, anticce fnsco fasciatce. 



Male. Black: abdomen piceous, tawny beneath, nearly twice 

 the length of the thorax: setae testaceous ; middle seta very slender, 

 about half the length of the abdomen ; lateral seta? with brownish 

 bands, more than twice the length of the body : legs tawny : fore- 

 legs dark tawny, very long : wings limpid ; veins brown : fore- 

 wings with a broad, brown band, which occupies full one-third of 

 the length, and extends nearly to the tip. Length of the body 4^ 

 lines ; of the setae 12 lines; of the wings 9 lines. 



a b. St. Martin's Falls, Albany River, Hudson's Bay. Presented 

 by Dr. Barnstou. 



19. PALINGENIA ALBIFILUM. 



Fulva ; caput nigrum ; antennae testacece ; abdomen testaceum ; 

 setae alba* corpore triplo longiores ; pedes testaeei, antici sub- 

 fusci ; alee limpidce, venis albis. 



Tawny : head mostly black : antennae testaceous : abdomen 

 testaceous: setae white, slender, thrice the length of the body: legs 

 testaceous : fore-legs brownish : wings limpid, broad ; veins white. 

 Length of the body 4 5 lines; of the setae 15 18 lines; of the 

 wings 10 13 lines. 



Var. Abdomen brownish above: fore-wings with a blackish 

 tinge towards the base : veins of the fore border blackish for one- 

 third of the length from the base. 



a, b. Para. Presented by J. P. G. Smith, Esq. 



20. PALINGENIA LATIPENNIS. 



Pallide testacea, nonnunquam obscurior ; seta albce, corpore duplo 

 longiores ; pedes albi ; alee subalbce, sublimpidce, venis albis. 



