EPHEMERINiE. 537 



Piceous: abdomen more than twice the length of the thorax : 

 setae pale piceous, pubescent, longer than the body : legs dull 

 tawny; fore-legs darker: wings grayish; veins black, clouded ex- 

 cept towards the tips and along the hind border with brown, which 

 forms in the disk a spot at one-third of the length, another at two- 

 thirds of the length, and an interrupted band between them. 

 Length of the body 5 lines ; of the seta? 6 lines ; of the wiugs 14 

 lines. 

 a. River St. Lawrence. Presented by the Entomological Club. 



6. Ephemera Colombia. 



Fulva ; antenna? f us ca? ; thorax testaceo notatiis ; abdomen luteum, 

 nigro fasciatum et bivittatum ; seta? fusca?, corpore duplo lon- 

 giores ; pedes fulvi ; ala? albida?, venis testaceis. 



Subimago. — Tawny : antennae brown : thorax with some tes- 

 taceous marks: abdomen luteous, about twice the length of the 

 thorax, with two black stripes, and with a black band on the hind 

 border of each segment : sets brown, about twice the length of the 

 body: legs tawny: wings whitish; veins testaceous. Length of 

 the body 4^ lines ; of the setse 9 lines ; of the wings 16 lines. 



a. Columbia. From Dr. Cuming's collection. 



7. Ephemera decora. 



Picea ; antenna? nigra?, bust fulva > ; abdomen ferrvginco varium ; 

 seta? testaceo?, fusco fasciata>, corpore multo longiores ; pedes 

 testacei, antici picei ; ala? hyalince, fusco maculalce et apud 

 venas nebulosa?. 



Piceous: antennas black, tawny at the base: abdomen rather 

 more than twice the length of the thorax, partly ferruginous on the 

 disk and about the borders of the segments : setae testaceous with 

 brown bands on the sutures of the joints, much longer than the 

 body : legs pale testaceous ; fore-legs piceous : wings hyaline ; veins 

 black, and with the exception of those at the tips and along the 

 hind border deeply clouded with brown which forms a few spots in 

 each disk. Length of the body b\ lines; of the setse 12? lines; of 

 the wings 13 lines. 



a. Canada. Presented by Dr. Barnston. 



3 A 



