410 A. E. Eaton — Notes on some native Bphemeridee. [No. 



side of the back. In segments 9 to 7 two of the streaks, linear and sub- 

 parallel with each other, lie close together beside the dorsal vessel, 

 extending the whole length of the segment (the outer streak is rather 

 broader than the other), while the third streak lies apart from them 

 close by the pleuron. In the more anterior segments (e. g., in the 3rd 

 segment) the main trachea in front of the spiracle is dark, and the three 

 streaks, in mutual contact at the apical margin, constitute a tripartite 

 marking : the streak nearest to the dorsal vessel becomes abbreviated 

 and subulate, but the other two combining either in the form of a V or 

 as a pair of conjugate triangular streaks, extend nearly to tbe base of the 

 segment. In the first segment, a quadrangular spot seems to be substi- 

 tuted for the streaks : the 9th ventral segment is bilineate lengthwise. 



Terminal jointlets of the forceps-limbs short for an Ephemera ; the 

 last of them smaller, but little if at all shorter than the penultimate. 

 The figure of 1883, cited above, is exact, and correctly leaves their pro- 

 portions in the dried insect uncertain. Penis lobes subcylindrical. The 

 admeasurement of setge of $ im. stated in 1871 [cf. E. faciata'] was 

 spurious, being based upon a specimen of the next species, referred to in 

 1883 with an expression of doubt as to identity of the species. 



Bah. Rainbodde, Ceylon. 



Ephemera remensa, sp. nov. 

 Five ^ images labelled " Kulu ^— — — ," inlndianMusfeum; 



and 1 $ imago labelled " Musuri," 7,000 ft., June, Long, in McLach. Mas. 

 Imago (dried) c?. — Genitalia similar to the ordinary European pat- 

 tern in this genixs : the last jointlet of the forceps-limb rather shorter 

 than the penultimate. A pair of very broad black stripes, diminishing 

 a little in breadth anteriorly, extend from the tip nearly to the base of 

 the 9th ventral segment and end abruptly : the other ventral segments 

 are bilineate longitudinally, excepting the first segment which is un- 

 marked. Neuration of the fore wing distinct to the naked eye through- 

 out (over white paper) excepting the branchlets of the intercalar veins 

 annexed to the anal nervure, and the base-ward extremities of the longi- 

 tudinal nervures posterior to the radius : under a lense, the portions 

 thus visible, and the neuration of the hind wing, from certain stand- 

 points only, appears of a uniform light pitch brown, but in most posi- 

 tions the finer of the longitudinal nervures acquire a brown amber tint, 

 the stronger neuration and the cross veinlets remaining pitch brown or 

 changing to pitch black. Wings transparent, tinted distinctly with 

 very light raw umber grey throughout, with markings of raw umber 

 brown. The niarkings of the fore wing comprise the submargiiial area 



