EEV. A. E. EATON ON EECENT EPHEJMEEID^ OE 3IATFLIES. 63 



and a spot at the tijo of the femur black. Setae brownish black, darkened at the tips of 

 the joints. Wing-membrane colourless ; hence the narrow grey bordering of the cross 

 veinlets is better shown than in the d ; spots grey. Length of body, 6 16-17, ? 16-23 ; 

 wing, c? 16-17, S 14-22 ; setce, 6 35 & 30-41 & 36, 2 im. 14-25, subiui. 17 mm. 



Sab. From Madrid {Bbr.), France, Switzerland, and Bavaria, northwards to Lapland 

 (Pict.). This species usually inhabits colder and swifter waters than E. vulgata, and is 

 the Mayfly of anglers. The $ subim. and 6 subim. are respectively designated by them 

 " Green Drake " and " Bastard Drake." 



Ephemera lineata, Etu. 



Ephemera % danica, Pict., Hist. Nat. Nevropt. ii. Eph(jm. 130, pi. vii. (1843 5) ; Ouliauine, Neuropt. 

 & Orthopt. of the Prov. of Moscow, 26 (1867). — ? E. % vulgata, part, Blanch., Metamorph. &c. des Ins. 

 127(1868) [nee p. 594, pi.]. — E. lineata, !Etn., Trans. Eut. Soc. London (1870), 1 ; id., op. eit. (1871), 

 71, pi. iv. 7-7 b [details] ; Hag., op. cit. (1873), 393 ; Meyer-Diii-, Bull. Soc. Ent. Suisse, iv. 306 

 (1874). 



Stibimago (living). — Wings greenish grey, broadly tinged with light grey along the 

 terminal margins ; cross veinlets black, some of them in the midst of the fore wing 

 bordered with black-brown so as to give rise to a series of spots. 



Imago (living). — d . Eyes dark sepia-brown above. Thorax pitch-brown above. 

 Abdomen above in the anterior segments greenish grey modified with bistre-brown, but 

 in the hinder segments becoming lutescent ; the segments marked with longitudinal 

 cm'ved or slightly sinuous black streaks tapering at the ends, the anterior segments 

 having each two long streaks on each side of the middle of the back, and the posterior 

 segments two short lines from the base between the two pairs of streaks ; venter 

 bilineated lengthwise with black. Forceps lutescent. Setae fuscous with black 

 joinings. Fore legs with the femiu- piceous, the tibia and tarsus black : hinder legs 

 greenish grey ; the coxa, a spot on each side of the end of the femur, the tip and the 

 joinings of the tarsus black. Wings vitreous, the fore wing in the marginal and sub- 

 marginal areas, and broadly along the terminal margin tinted with blackish grey. 



? . Head yellowish ochreous, about the ocelli brown-ochreous, the eyes intermediate in 

 colour between bistre and sepia-brown. Pronotum greenish grey, with a black lon- 

 gitudinal stripe on each side ; meso- and metanotum brown-ochreous, with two dark 

 longitudinal streaks between the wings. Fore legs warm sepia-brown, the end of the 

 femm", both extremities of the tibia, and the terminations of the tarsal joints black. 

 Wings vitreous, the anterior tinged in the marginal and submarginal areas with 

 greenish grey ; longitudinal nervures greenish grey, cross veinlets black. Length of 

 body, d 15-20, ? 21-25 ; wing, s 16, ? 20-21 ; setae, 6 im. 30 & 35-36 ; 2 im. 24 & 26 

 to 25 & 24, subim. 15 mm. 



Sab. England, near B;eadiug, on the Thames and Holybrook ; France, near Paris ; 

 Switzerland, at Genthod, near Geneva. June and July. Dr. Hagen has sent me the 

 two 2 specimens cited as English examples of E. glaucops in his ' British Synopsis 

 (1863). My conjecture in 1871 that they were in reality E. lineata was correct. 



