EEV. A. E. EATON ON EECENT EPHEjVIEEID.E OE MAYFLIES. 167 



i. 547 (1758) ; id., Fn. Suec. ed. ii. no. 1479 (1761) ; [Geof., Hist. Abreg. cles Ins Paris, ii. 240, 



no. 7 (1764)] =£. striata, Linu., Syst. Nat. eel. xii. pars ii. 907 (1767) ; Fab., Syst. Ent. 304 (1775) ; 

 id., Sp. Ins. i. 385 (1782) ; id., Mant. Ins. i. 244 (1787) ; Berkenh., Outl. of the Nat. Hist, of Gt. Brit. 

 & Ireland, ed. 2, i. 150 (1789); Vill., C. Lin. Ent. iii. 20 (1789) ; Gmel., Linn. Syst. Nat. ed. xiii. i. pars 

 V. 2630 (1790); 01., Encycl. Meth. vi. 420 (1791); Fab., Ent. Syst. emend, iii. pars i. 71 (1793); 

 Cederh., Fn. Ingricse Prodr. 135 (1798) ; Lat., Hist. Nat. d. Crust. & Ins. xiii. 99 (1805) ; Stewart, 

 Elem. Nat. Hist. Anim. K. ed. 2, ii. 226.— ?£■. ciliata, Strom, N. Saml. Kongl. Dansk. Vidensk. Selsk. 

 Skrift. ii. 91 (1783) ; Wallengren, Christ. Vidensk. Forhandl. no. ii. 22 (1880). 



Clo'e pumila, Burm., Handb. d. Ent. Bd. ii. Abth. ii. 799 (1839) ; Piet., Hist. Nat. Nevropt. ii. Ephem. 

 253, pi. xl. 2 (1843-5) ; Bran., Neuropt. Austr. 26 (1857) ; Karsch, Die Insectenwelt, v. 402 (1863) ; 

 ! Hag., Ann. Soe. Ent. Fr. (4) iv. 39 (1864) : Meyer-Dur, Mitth. Schw. Ent. Ges. i. 221 (1864) ; 

 Ausser., Ann. d. Soc. Natnr. Modena, An. iv. 136 (1809)—? C. striata, Pict., Hist. Nat. Nevropt. ii. 

 Ephem. 270 (1843-5) ; Oulianiue, Neuropt. & Orthopt. of Prov. of Moscow, 28 (1867). 



Cloeon pumila, Walk., List, of Neuropt. Ins. in Brit. Mus. part iii. 573 (1853). — ? C. striata, id., op. 

 cit. 576 (1853). 



Baetis pumiliis, ! Etn., Trans. Ent. Soc. London (1871) 118, pi. v. 25-25a [details] ; ! id., op. cit. (1873) 

 401 [mode of oviposition] ; Meyer-Diii'., Bull. Soc. Ent. Suisse, iv. 310 (1874) ; Rostock, Jahresb. d. 

 Ver. f. Naturk. Zwickau, 1877, p. 87 (1878). 



Snbimago {living). — Wiugs tinted with charcoal blackish. Legs greenish grey with 

 light black-grey tarsi. Setae light black-grey. 



Imago {living). — 6 . Turbinate eyes intense sepia-, or bnrnt-umber brown. Thorax 

 jet-black aboye. Abdomen in segments 2-7 translucent white, the remainder yellowish 

 pitch-brown above, umber-brown beneath. Forceps and setse white. Legs white ; the 

 fore femur, the tarsi, and the extremities of the tibiae light black-grey. Wings vitreous. 



? . Eyes olivaceous ; vertex of head traversed lengthwise by a double median rufo- 

 piceous stripe. Thorax black or pitch-brown above. Abdomen above reddish pitch- 

 brown, with the joinings, and sometimes with an abbreviated longitudinal line from the 

 middle of the base between two curved lines in nearly every segment ochraceous ; venter 

 paler, with a series of L-shaped warm sepia-brown marks or oblong rufo-piceous spots on 

 each side of it. Setae very light reddish brown-grey. Legs either almost uniformly pale 

 grey, or else greenish grey with sepia-grey tai'si. Length of body 5-7 ; wing, s 4-6, 

 S 6-8 ; setae, d im. 11-13, subim. 10, ? im. 7*5-10, su.bim. 7-10 mm. 



Sab. Great Britain in streams and rivers. Widely distributed on the Continent, 

 rnngiug from Scania and Norway (Wallengren) southwards to Portugal and Corsica 

 [occurring at Cintra in April at about 380 ft., water 58° P. ; at Cea in the Estrella 

 in June at 1800 ft., water 56° E. ; and at Villa Real, Traz-os-Montes in June at 1630 

 ft., water 58° E.) and eastwards to Armenia (Hag. Mus.). In Savoy and Switzerland it 

 ranges from the lowlands up to about 5800 ft. in the neighbourhood of Champery near 

 the Chalets de Pas (5.15 p.m. 19 August, water 51° E.), and it is found in Erance, 

 Grermany, and Austria. The terminal joint of each of the forceps-limbs is^'oval or globular. 

 The intermediate nerve of the hind wing is usually forked ; and the fork contains a 

 simple veinlet from the terminal margin, 



Baetis niger, Linn. Plate XVI. 29/ (forceps). 

 Ephemera nigra or [Ephemera'],lAixa., Fn. Suec. ed. ii. no. 1478 (1761); id., Syst. Nat. ed. xii. 



