566 EPHEMEEIN.E. 



32. Baetis tessellata. 



Albido-testacea, sat lata, fusco notata ; abdomen supra fuscum ; 

 seta testacea, corpore fere duplo longiores ; pedes testacei,fe- 

 moribus niyro fasciatis, tarsis fuscis ; alee subcinerece, venis 

 testaceis fusco nebulosis. 



Subimago. — Whitish testaceous, rather broad, marked here 

 and there with brown : antennae brown, testaceous at the base : ab- 

 domen brown above, less than twice the length of* the thorax: setas 

 testaceous, without bands, nearly twice the length of the body : 

 legs testaceous, rather long ; femora with a blackish band on each ; 

 tarsi brown : wings grayish ; veins testaceous, clouded with black. 

 Length of the body 5 lines ; of the setae 9 lines ; of the wings 14 

 lines. 



a. Nova Scotia. From Lieut. Redman's collection. 



33. Baetis albivitta. 



Nigra, gracilis, albo vittata, subtus ferruginea ; set&fusca, testaceo 

 annulate, corpore duplo longiores; pedes testacei, tibiis tar- 

 sisque anticis nigris ; ala sublurida, anticce cosla saturate 

 lurida, postica? venis fusco nebulosis. 



Black, slender, with a white dorsal stripe extending along the 

 whole length of the body, and having a testaceous tinge on the head ; 

 under side ferruginous : setae twice the length of the body, brown 

 with testaceous bands : legs testaceous ; fore-tibiae and fore-tarsi 

 black: wings with a slight lurid tinge; veins black: fore-wings 

 deeply lurid along the fore border: veins of the hind-wings clouded 

 with brown. Length of the body 8 lines ; of the setae 16 lines ; of 

 the wings 13 lines. 



a. Para. Presented by Gordon Graham, Esq. 



b. Brazil From Mr. Stevens' collection. 



