EEV. A. E. EATON OX EECENT EPIIEMEEID.E OR MAYELIES. 61 



the last segment greenish black above, olivaceous at the sides ; eighth and nintli seg- 

 ments often lutescent or ochraceous beneath. Wings pale greenish grey-tinted or yel- 

 lowish green-tinted with black neuratiou ; many of the cross veinlets away from the 

 terminal margin bordered with pitch-brown, their bordering forming (through con» 

 fluence) spots in the midst of the fore wing, and a blotch nearer the base of the wing, 

 and also confluent in the submarginal area near the base ; hind wings broadly grey- 

 tinted along the terminal m.argin. Legs olivaceous or olive-brown ; fore femur pitch- 

 black, tarsus brownish ; hinder tibire and tarsi more or less deeply tinged with brown- 

 ochre or lutescent, with the extremity of the last tarsal joint and the ungues dark. 

 Forceps and setfo pitch-brown or lutescent, the former with the apices; the latter at the 

 joinings black-tinted. 



5 . Very like the S , but with the upper half of the oculi pale olivaceous, and the under 

 half dark sepia-brown. Pronotum jet-black. Fore femora olive-brown, the tibia and 

 tarsus tinged with brown-ochre or lutescent, witli the tips of the tarsal joints and the 

 ungues darker. Wings paler than in the d ; there is sometimes a spot in the midst of 

 the hind wing. 



In ill-marked examples of either sex curved lines take the places of the triangular 

 abdominal streaks. 



Length of body 14-22 ; wing, s 16-17, ? 18-24 ; setfe, 6 im. 33 & 31-32 & 36, 

 subim. 16 & 17-19-5 & 21 ; 2 im. 22 & 21-2G & 20, subim. 17 & 16-18 & 19. 



Hab. In Europe, from Bavaria, Switzerland, and the middle of France, northwards to 

 Lappmark ; May, June, and part of July. Dr. Hagcn forwarded an Ephemera obtained 

 in Eastern Siberia, very similar to, if not identical with, E. vulgata, but having the 

 hinder legs much lighter in colour than the normal European insect. Some specimens 

 from Saxony and Posen (in M^Lach. Mus.) have the wings more strongly tinted, and 

 the bordering of the cross veinlets rather broader than is customary in English 

 examples. 



Ephemera danica, Miill. Plate VIII. 12 a (wings, legs, forceps). 



Ephemera clanica, Miill., Fn. Ins. Fried. 63 (1764) ; id., Zool. Dan. Prodr. 112 (1776) ; Vill., C. Linn. 

 Ent. iii. 18 (1789); [Ephemera, ! Ronald's Fly-fish. Ent. cd. i. pi. xiii. 28-.29 (1836);] Walk., List of 

 Neuropt. in Brit. Mus. 535 (1853); Hag., Ent. Ann. (1863), 15; ! Etn., Trans. Ent. Soc. Lond. (1871), 

 72, pi. iv. 8, 8 a [details] ; Rostock, Jaliresb. d. Ver. f. Naturk. Zwickau, 1877, p. 82 (1878); Meyer- 

 Diir,Bull. Soc. Ent. Suisse, iv.306 (1871).— &$ maculata, Vill., C.Linn. Ent. iii. 22 (1789).— £. XvuUjata, 

 Scop., Ent. Carn. 263 (1763) ; Don., Nat. Hist. Brit. Ins. iv. 53, pi. cxxviii. (1795); Sara., Ent. Comp. 

 260, pk vii. 2 ( 1819) ; Wood, 111. Linn. Gen. Ins. ii. 21-23, pi. xlvii. (1821) ; Dumeril, Cons. Gen. s. la CI. 

 des Ins. 20-1, pi. xxviii. 4-5 (1823) ; Newport, Todd, Cyclop, f. Auat. & Physiol, ii. 864, fig. 345 (1839) ; 

 Westw., Introd. ii. fig. 61, 1 [the abdominal spots hind before] (1840) ; Blanch., Hist. Nat. des Ins. iii. 

 53 (1840); ! Ranib., Hist. Nat. des Ins. Nevropt. 293 (1842) ; Pict., Hist. Nat. Nevropt. ii. Ephem. 126, 

 pis. i.-vi. (1843-5); Blanch., Cuv. Reg. An., ed. Crochard, xiii. 91, xiv. pi. cii. 1-1 c (1818) ; Ronald's 

 Fly-fish. Ent. ed. v. no. 28, pi. xiii. (1856) ; Brauer, Neuropt. Austr. 25 (1857); Gerstackcr, Handb. d. Zool. 

 ii. 59 (1863); E. Pict., Nevropt. d'Esp. 22 (1865) ; Oulianine, Neuropt. & Orthopt. of Prov. of Moscow, 

 25 (1867) ; Ausser., Ann. d. Soc. Natur. Modena, An. iv. 131 (1869) ; Meyer-Diir, Bull. Soc. Ent. Suisse, 

 iv. 306 (1874) ; Joly, Rev. d. Sc. Nat. Montpcllier, v. pi. vi. 1 [after Pict.] (1876).— £. corjnalu, ! Steph., 



