172 "REV. A. E. EATON ON EECENT EPHEMERID^ OE MAYFLIES. 



traces of hind wings in the 4 specimens (Nos. 34, 49, 50, 51) had disappeared, if they ever 

 had existed at all. 



Baetis consuetus, Hagen. 



CloS conmeta, ! Hag., Verb, zool.-bot. Gesells. Wien, viii. 477 (1858) ; Etu., Trans. Ent. Soc. London 

 (1871) 131; Hag., op. cit. (1873) 403. 



Subimago [dried). — Wings transparent, tinted thronghout with very pale smoky grey; 

 neuration opaque light brown, the cross veinlets in certain postures seeming darker than 

 the longitudinal nervures. Legs pale brownish-yellowish, the fore femur tinged with 

 reddish brown towards its extremity. Setae warm sepia-grey or fuliginous. Mesouotum 

 very pale yellowish brown in the middle ; the jdeura; fuscous ; pectus and venter jiale 

 ochraceous ; dorsum of abdomen discoloured, but dark and paler along the middle. 



Imago (drled).^ 6 . Wings vitreous ; some of the longitudinal nervures yellowish at 

 the base ; the pterostigmatic space of the fore wing contains 2-5 simple straight cross 

 veinlets, without any granulations between them. Hind wing trinerved. Mesonotum 

 lutescent ; sides of the thorax dark brown-ochre ; pectus and venter ochraceous ; dorsum 

 of the abdomen varied with dark reddish brown and pale ochraceous, — the paler colour 

 forms large blotches in the midst of segs. 2-7, and some longitudinal linear streaks near 

 the spix'acles, leaving on each side of these segments a broad dark longitudinal stripe 

 continuous with that of the thorax; the joinings of these segments, and the whole 

 dorsum of the subsequent segments dark reddisli brown. Legs pale amber-colour ; the 

 fore femur indistinctly annulated with reddish brown close to or at its extremity. 



2 . Very similar ; but the dorsum of the abdomen is darker, with piceous joinings ; 

 setae sepia-grey, with some of the joinings towards their roots darker. Tibia and tarsus 

 of the fore leg sepia-grey. Length of body, d 3-4, ? 4"5 ; Ming, d 4'5-5, ? 5-6 ; setae 

 d subim. 9 mm. 



Sab. Rainbodde, Ceylon, at altitudes of 4000 feet and upwards (Hagen Mus.). With 

 the types of this species, and from the same locality, stood a single example of probably 

 a different species, inarked 41, characterized as follows : — 



Imago (dried). — d . Wings vitreous, with pale yellowish-brownish perspicuous neura- 

 tion ; 4-8 slightly curved, cross-veinlets in the pterostigmatic space of the fore wings, 

 linked together by a somewhat sinuous row of adventitious veinlets near the costa, which 

 thus give rise to a series of cellules, but there are no granulations between the cross 

 veinlets. Thorax polished, bright brown-ochreous. Abdomen in segments 2-6 translucent 

 ochraceous white, pitch-brown at the joinings ; segment 7 ochraceous ; segments 8-10 

 brown-ochreous ; venter pallid, subochraceous. Setas sepia-grey, with dark joinings. 

 Legs dull pale testaceous ; fore femur tinged slightly with golden-brown, the tibia and 

 tarsus fumatose. Commensurate with B, consuetus. 



Baetis solidtjs, Hagen. 



CM soMa, ! Hag., Verli. zool.-bot. Gesells. Wien, viii. 477 (1858) ; Etn., Trans. Ent. Soc. Loudon 

 (1871) 131. 



Subimago [dried). — Wings transparent, pale sepia-grey ; neuration for the most part 



