EPHEMERIN.E. 559 



12. BAETIS FLAVEOLA. 



Corpus omnino fulvum velflavum ; alee hyalince aut basi subtinctce, 

 areola costali immaculata.) venis transversis nigricantibus op- 

 time determinatis. 



Baetis flaveola, (Kollar, MSS.) Pictet, Hist. Nat. Neur. Eph. 

 186, 12, pi. 23, f.4. 



B. flaveola P Pale testaceous : antennae darker : abdomen pale 

 luteous, with narrow blackish bands on the sutures of the segments, 

 about twice the length of the thorax : setae whitish, very minutely 

 pubescent, without bands, more than twice the length of the body : 

 legs whitish, slender: fore-legs long ; femora with a brownish spot 

 in the middle and another at the tip : wings limpid ; veins brown- 

 ish, partly pale, not strongly marked. 



Subimago. Paler: seta? shorter: wings slightly opaque, pu- 

 bescent along the hindborder ; veins pale or brown. Length of the 

 body 2 lines ; of the seta3 8 lines ; of the wings 9 lines. 



a c. St. Martin's Falls, Albany Kiver, Hudson's Bay. Presented 

 by Dr Barnston. 



13. BAETIS GUTTATA. 



Corpus fulvum , fusco maculatum ; pedes distinctissime maculati ; 

 alee hi/alina aut basi subtinctce ; areola costalis fuscescens 

 invaria. 



Baetis guttala, Pictet, Hist. Nat. Neur. Eph. 187, 13, pi. 24, f. 3. 

 Switzerland. 



14. BAETIS AUSTRALASICA. 

 Areola costalis venis transversis nigro maculatis. 



Baetis Australasica, (Kollar, MSS.) Pictet, Hist. Nat. Neur. Eph. 

 189, 14, pi. 24, f. 1. 



New Holland. 



