94 EEV. A. E. EATON ON EECENT EPHEMEEID^ OE MATELIES. 



$ mucli like the c? , with the fore tihise pale reddish luteous ; abdomen opaque, pitch- 

 brown above, and intense sepia-brown beneath. Length of body 6-12 ; wing 6-11 ; 

 setae, <? im. 12-20, subim. 9, ? im. 8-16 mm. 



Hab. Temperate and Arctic Europe and America ; also Turkestan (Fedtschenko Exp.). 

 In cold regions the flies appear in tlie height of summer, elsewhere in spring, early 

 summer, and the autumn. Mr. Albarda sent me specimens of a species found in Holland, 

 apparently distinct from, but very nearly related to, L. marginata. An accidental loss 

 of the detailed drawings precludes its description. 



Leptophlebia submarginata, Steph. 



Ephemera submarginata, ! Steph., 111. Brit. Eiit. vi. 58, no. 7 (1835). — E. dispar, ! id., op. cit. vi. 58, 

 no. 8 (1835).— £. helvipes, ! id., op. cit. vi. 59, no. 14 (1835). 



Potamanthus Geerii, Pict., Hist. Nat. N^vropt. ii. Ephein. 211, pi. sxvi. 1-3 (1843-5) ; Walk., List 

 of Neuropt. Ins. in Brit. Mus. part iii. 541 (1853) ; Brauer, Neuropt. Austr. 27 (1857); Hag., Ent. 

 Ann. (1863), 18; Ausser., Ann. d. Soc. Natur. Modcna, An. iv. 136 (18G9).— P. dispar, Pict., Hist. Nat. 

 NevTopt. ii. Ephem. 234 (1843-5) ; Walk., List of Neuropt. Ins. in Brit. Mus. part iii. 542 (1853).— 

 P. helvipes, Pict., Hist. Nat. Nevropt. ii. IZphem. 235; Walk., List &c. part iii. 543 (1853). — P. submar- 

 ginatus, Pict., Hist. &c. 236 (1843-5) ; Walk., List &c. part iii. 545 (1853). 



"^XBaetis reticulata, Burm., Handb. d. Ent. Bd. ii. Abth. ii. 801 (1839) ; Pict., Nat. Hist. Nevropt. 

 ii. Eph(5m. 192 (1843-5) ; Walk., List of Neuropt. Ins. in Brit. Mus. part iii. 561 (1853). 



XCloeon J culiciformis, ! Walk., op. cit. part iii. 576 (1853). 



Leptophlebia helvipes, ! Etn., Trans. Ent. Soc. London (1871), 85, pi. iv. 26-26 d [details] ; Meyer- 

 Diir, Bull. Soc. Ent. Suisse, iv. 317 (1874) ; Rostock, Jaliresb. d. Ver. f. Naturk. Zwickau, 1877, p. 84 

 (1878). 



Subhnago [living). — Wing-membrane fawn-colour or smoke-grey, with black cross 

 veinlets broadly edged with grey-black ; these are so arranged as to leave a clear space 

 of the ground-colour in the midst of the fore wing, extending transversely to a variable 

 distance from the costa, and sometimes enclosing a small group of crowded cross 

 veinlets adjacent to the bullae ; there is often another similarly pale space at the base of 

 the wing, reaching from the anal (8) nervure to the inner margin, and from the wing- 

 roots to the confines of the intercalar nervures of the anal-axillar interspace. Legs of 2 

 piceous, with black tarsi. 



imago {living), 6. — Eyes dull rufo-piceous or dark purple-brown above, fuscous 

 beneath. Thorax jet-black above. Abdomen pitch-brown on the dorsum, with the 

 joinings of the intermediate segments whitish grey ; segments 7-10 darker than the 

 preceding, and with flavescent joinings. Venter light warm sepia-brown, with joinings 

 as above ; segments 8 and 9 pitch-brown, lutescent posteriorly ; dark rusty spots indicate 

 the ventral ganglia. Eorceps furfurosus. Setaa warm sepia-grey, with darker joinino-s. 

 Wings vitreous, with the stronger nervures furfurosus or amber-brown. Eore legs black, 

 with grey-black tarsi, or with the femur pitch-black, and the remainder black. Hinder 

 femora pitch-brown, the tibise and tarsi either dark warm sepia-grey, or sometimes 

 yellowish brown or fulvescent. 



$ very like the 6 . Eyes pitch-brown. Setse reddish brown, with dark joinings. 



