EPHEXERINiE. 567 



34. Baetis annulata, Mas. 



Ferruginea, subtus testacea ; thorax testaceo bivittaius ; abdominis 

 latera testaceo maculata ; setce albidce, nigro annulata ; -pedes 

 albidi fasciis nigricantibus, antici longissimi ; alee hyalince. 



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 : seta? 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 ; seta picece, corpore plus duplo longiores ; pedes 

 picei ; ales hyalince, anticce basifuscce. 



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: setae 

 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 ; 

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



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



36. Baetis? determinata, Mas. 



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

 nis vitta piceo notata ; pedes iestacei, femoribus ferrugineo 

 fasciatis, tarsis apice ferrugineis ; ahe UmpidcB, costa fusca 

 striga basali Jlava. 



