72 EEV. A. E. EATON ON EECENT EPHEMEEID^ OE MAYELIES. 



20; sete, d im. 20 & 14, subim. 9-12, ? im. 12 & 10, subim. 12 mm. (after 

 Walsh). 



Sab. Rock Island, 111. (Walsh). A fragment of a ? subim. apparently of this species 

 is in Mr. M°Lachlan's collection. 



Ephemera myops, Walsh. 



Ephema-a myops, Wahh, Proc. Eat. Soc. Philad. ii. 207, note 20 (1863); Etn., Trans. Ent. Soc. 

 Loudon (1871), 71. 



This species was described by Mr. Walsh from two d examples, one of them reared 

 from the subimago, which differed in colour from one another. The description is 

 diagnostic only. Eyes smaller and wider apart than in U. flaveola ; abdomen either 

 yellowish throughout, or in segments 1-5 ferruginous, in segment 6 and segment 9 paler, 

 and in segments 7 and 8 yellowish. Length of body 12-13 ; exp. of wings 26-27 ; 

 setffi 27 & 19-29 & 21 mm. 



Hal). Eock Island, 111. (Walsh). 



Ephemera immaculata, Etn. 



Ephemera immaculata, ! Etn., Trans. Ent. Soc. London (1871), 74. pi. iv. 10 [detail]. 



Imago {dried), 6 . — Thorax brunneo-luteous above. Abdomen fuscous, the tips of the 

 segments and the spiracular lines darker. Setie light bistre-brown. Wings spotless, 

 vitreous; the fore wing in the submarginal area, and the hind wing at the terminal 

 margin tinged with sepia-grey ; neuration dark. Fore legs piceous, the bases of the 

 femora lighter ; hinder legs brunneo-testaceous. Length of body, 6 , 10*5, wing 11 mm. 



Hab. Cuna, Hindostan (Hope Mus., Oxford). 



Ephemera expectans. Walk. 



XPotamanthus expectans, ! Walk., Trans. Ent. Soc. London, N. S. v. 198 (1860). 

 Ephemera expectans, ! Etn., Trans. Ent. Soc. Loudon (1871), 74. 



Subimago {dried). — Fore wings very pale raw-sienna, with dull light brown-ochreous 

 longitudinal neuration, and intense violet-carmine (approaching black-purple) cross 

 veinlets ; hind wings rather greyer, with black-purple cross veinlets. Setse raw-umber 

 grey, with pitch-black joinings. Thorax brown-ochreous above, with a broad pitch- 

 brown stripe on each side of the pronotum, followed by a line on each side of the 

 mesonotum, extending to the area above the wing-roots. Abdomen (discoloured) dark 

 orange-brown, with four slender longitudinal black lines in segments 2-8, and two lines 

 alono- the venter. Fore legs dark brown-ochreous, the termination of the tibia pitch- 

 black, the distal edges of the nearer tarsal joints and the whole of the terminal joint 

 and ungues pitch-brown ; hinder legs lighter, with the broader ungues pitch-brown. 

 Length of body, ? 11, wing 14 mm. 



Hab. Hindostan (Walker, in Brit. Mus.). 



Ephemera supposita (renamed). Plate VIII. 12 c (forceps). 



X Potamanthiisfusciatus, ! Hag., VerL. zool.-bot. Gesells. Wien, viii. 476 (1858) [part]. 



Eijhemera fasciata, ! Etn., Trans. Ent. Soc. London (1871), 74, i^l. iv. 11, 11 a [details] ; idem, op. cii. 

 (1873), 393. 



