EPHEMERIN,. 567 



34. BAETIS ANNULATA, Mas. 



Ferruginea, subtus testacea ; thorax testaceo bivittatus ; abdominis 

 latera testaceo maculata ; setce albidce, nigro annulaice ; pedes 

 albidi fasciis nigricantibus , antici longissimi ; alee hyaline. 



Male. Ferruginous, testaceous beneath: eyes very large, con- 

 nected : antennae brown, ferruginous at the base : thorax with two 

 testaceous stripes : abdomen rather less than twice the length of the 

 thorax; each segment with a triangular testaceous spot on each 

 side : setae whitish, mutilated, with black bands on the sutures of 

 the joints: legs whitish, with blackish bands: fore-legs very long : 

 wings hyaline ; veins blackish, very slender, but distinct. Length 

 of the body 5 lines ; of the wings 13 lines. 



a. Trenton Falls, New York. Presented by the Entomological 

 Club. 



35. BAETIS TAPROBANES, Mas. 



Nigra; thoracis latera ferrugineo notata ; abdominis latera testa- 

 ceo maculata ; setce picece, corpore plus duplo longiores ; pedes 

 picei ; alee hyalines, anticce basi fusees. 



Male. Black : thorax with some ferruginous marks on each 

 side : abdomen twice the length of the thorax ; each segment with 

 a triangular testaceous spot on each side of the fore border : seta; 

 piceous, much more than twice the length of the body : legs pice- 

 ous : wings hyaline; veins black; transverse veins numerous and 

 distinct: fore-wings brown at the base; fore border pale brown for 

 one-third of the length from the tip. Length of the body 5 lines ; 

 of the setae 14 lines; of the wings 13 lines. 



a. Ceylon. Presented by R. Templeton, Esq. 



36. BAETIS? DETERMINATA, Mas. 



Picea, flavo vittata, subtus testacea; caputflavo varium ; abdomi- 

 nis vitta piceo notata ; pedes testacei, femoribus ferrugineo 

 fasciatis, tarsis apice ferrugineis ; alee limpidce, costa fusca 

 striga basaliflava. 



