146 EEV. A. E. EATON ON RECENT EPHEMEEID^ OR MAYFLIES. 



ochreous ground-colour, of a similar pattern to those of the 6 . Setse white. Legs 

 nearly as in d , but in some lights the fore tibia and tarsus appear sepia-grey. Length 

 of body, cJ 4, ? 6; wing, d 4, 2 6 ; sette, d im. about 15, subim. 2-5 & 3-3 & 4, 2 im. 

 4-5, subim. 3 & 4 millim. 



Hub. Holland, the Ijssel, near Gouda, by the nearest lock on tlie way to Stein ; end 

 of July. 



C^Nis Harkisella, Curtis. 



Brachycercus Harrisella, Curt., Lond. & Edinb. Phil. Mag. ser. 3 (1834), 122. 



Ccenis Harrisella, Stepli., 111. Brit. Ent. vi. 61 (1835) ; Pict., Hist. Nat. Nevropt. ii. Ephcm. 286 

 (1843-5) ; Walk., List Neuropt. iu Brit. Mas. part iii. 583 (1853).— C. luduosa, Pict, Hist. &c. 283, 

 pi. xlv. 3 (1843-5) ; Walk., List &c. 582 (1853) ; Hag., Stet. Eut. Zeit. xxyi. 229 (1865) ; ! Etn., Trans. 

 Ent. Soc. Lond. (1871), 97, pi. v. 6 [forceps] ; Hag., Trans. Eut. Soc. Lond. (1873), 399; Meyer-Dur, 

 Bull. Soc. Ent. Suisse, iv. 308 (1874); Rostock, Jalircsb. d. Ver. f. Naturk. Zwickau, 1877, p. 79 

 (1878).— C. Xhalterata, ! Etn., Trans. Ent. Soc. Lond. (1868), 279-81 [nymph]. 



Oxynjplia luduosa, Eurm., Handb. d. Ent. Bd. ii. Abth. ii. 797 (1839). 



Ephemera I brevicaitda, Blanch., Hist. Nat. dcs Ins. iii. 54 (1840). 



Suhimago {living). — Head and pronotum greyish black; meso- and metanotum black. 

 Abdomen light brown-ochre or light cinnamon ; setse black. Wings tinted with l)lackish 

 grey ; their neuration dark. Legs white, sometimes smoky white ; the tarsus, tibia, and 

 estrenyty of the femur of the fore leg carbonaceous black. 



Imago, $ & d {living). — Head and thorax pitch-black, with the sutures and pleurye 

 of the latter Roman sepia-brown. Abdomen Roman or warm sepia-brown, with a short 

 dark line on each side at every joining, and pale elongated spots near the bases of the 

 setaceous pleural prolongations of segments 7-9 ; forceps and setse grey or light blackish 

 grey. Wings whitish, with grey nervures, excepting the piceous su1)costa and radius. 

 Fore tarsus warm sepia ; hinder legs light blackish grey, with the joinings black. Length 

 of body, 6 6-5, 2 5-7 ; wing 5-5-6 ; setse, d im. 25, subim. 4, 2 subim. 3 & 4 millim. 



Sab. England, in the Kennet, near Reading, and in Somersetshire; Berlin (Burm.); 

 St. Petersburg (Hag.) ; Lake of Thun (Pict.). The nymph is easily recognized by its 

 strangely subcorneal ocelli : on one occasion I caught one in the part of the Garonne flowing 

 between St. Michel and the lie des Grands Ramiers, Toulouse. It probably flies by night. 



CyENIs oophoba, Kollar MS. 



Ca-nis oophvra, Pict., Hist. Nat. Nevropt. ii. Ephedra. 284, pi. xlv. 4 (1843-5) ; Walk., List of Neuropt. 

 Ins. in Brit. Mus. part iii. 582 (1853) ; Etn., Trans. Ent. Soc. London (1871), 97. 



Adult, 2 {dried). — Brilliant brown; legs lutescent, spotless. Wings Avhitish, with 

 their neuration more distinct than iu ordinary species of Ccenis, and the radius stouter 

 and darker. Length of body 4 ; expanse of wings 11 millim. 



Hab. Sardinia (after Pictet). Described from a defective 2 example. 



CiENIS ARGENTATA, Kollar MS. 



Canis argentata, Pict., Hist. Nat. Nevropt. ii. Ephem. 279, pi. xliii. 6 (1843-5); Walk., List of 

 Neuropt. Ins. in Brit. Mus. part iii. 381 (1853) ; Etn., Trans. Ent. Soc. London (1871), 96. 



