64 EEV. A. E. EATON OX EECEXT EPHEMEEID.E OE MAYFLIES. 



Ephemera glaucops, Pict. Plate VIII. {cl lieadcJ). 



Ephemera Xlutea, Sulz., Abgek. Gesch. d. Ins. 171, pi. xxiv. 6 (1776) ; Rom., Gen. Ins. Lin. & Fab. 

 Icon. Illust. pi. xxiv. 6 [after Sulz.], Explic. 23 (1789) ; Burm., Handb. d. Ent. Bd. ii. Abtli. ii. 804 (1839) ; 

 ! Ramb., Hist. "Nat. des Ins. Xevropt. 29-i {1842).— E.c/laucops, ! Pict., Hist. Nat. Nevropt. ii. Ephem. 132, 

 pi. viii. 1-3 (1843-5) ; Walk., List of Nem-opt. Ins. in Brit. :Mus. 536 (1853) ; Brau., Neur. Austr. 25 

 (1857); Hag., Ent. Ann. (1863), 16; Karscli, Die Insectenwelt, v. 400 (1863); Meyer-Dur, Mitth. 

 schw. ent. Gesch. i. 221 (1864) ; Oulianine, Neuropt. & Orthopt. of the Prov. of Moscow, 26 (1867) ; 

 Ausser., Ann. d. Soc. Natur. Modcna, Ann. iv. 132 (1869) ; ! Etn., Trans. Ent. Soc. London (1871), 73, 

 pi. iv. 9 (details) ; Hag. & Etn., op. cit. (1873), 393; Meyer-Diir, BuU. Soc. Ent. Suisse^iv. 306 (1874) ; 

 Rostock, Jahresb. d. Yer. f. Naturk. Zwickau, 1877, 82 (1878). 



Suhimago {living). — Wings very light warm sepia-grey, the cross veinlets black, edged 

 with darker warm sepia-grey, their edging forming spots in the usual places about the 

 middle and near the base of the wing, tbe terminal borders of the wings broadly margined 

 with light grey or warm-sepia. Eyes csesious, or extremely light verdigris or blue 

 verditer. 



Imago {living). — 6 . Eyes above either light brownish-olivaceous or rusty yellowish, 

 beneath either dark brownish-olivaceous or rusty purple-madder ; face light yellowish. — 

 {Dried.) Thorax above polished light reddish brown, the pronotum on each side slightly 

 fuscescent (with a black streak tliere during life). Abdomen very light brownish ochre 

 above, lighter beneath and marked with black ; the dorsal markings are in segments 2-6 a 

 single grey or black spot or longitudinal streak on each side of the segment about mid- 

 way betAveen the dorsal vessel and the lateral margin, gradually lengthening in the more 

 hindward segments, and originating near the base of each segment, but terminating at 

 some distance from the hinder border ; in segments 7-9 two such curved linear streaks 

 placed close together on each side in a corresponding position ; in segment 10 a similarly 

 placed black spot on each side ; also in every segment but the last a black spot on each 

 side at the base upon the prominent lateral joining, followed in segments 4-5 by a 

 curved Line, but in segments 6-7 by a fine slightly sinuous longitudinal black line, and 

 in segments 8-9 a fine straight line situated a little higher up the side towards the 

 hinder margin ; ventral markings variable, con.sisting in Avell-marked specimens of a 

 single discontinuous longitudinal series of linear stripes on each side of the middle tract, 

 dilated a little at both ends in segments 4-7 ; but sometimes the stripes are interrupted 

 in every segment between these dilatations, so as to leave a streak pointing backwards 

 near the base, and another pointing forwards near the distal border, or (in some of the 

 anterior segments) only small spots instead of streaks ; and sometimes the hinder of these 

 streaks or spots is obsolete in every segment. Setae light rusty brown with dark-brown 

 joinings. Forceps partly concolorous with the abdomen, and either black or piceous at the 

 joinings only, or else with the basal and last two joints dark brown. Wings transparent, 

 with rufescent or light Mars-yeUow longitudinal nervures, and black cross veinlets, the 

 former in transmitted light becoming rufous-amber colour ; in the fore wing the submar- 

 ginal area, the pterostigmatic portion of the marginal area, the narrow edging of most of the 

 cross veinlets in front of the anal uervure (8), and the usual spots are very light raw-umber, 

 and an almost imperceptilile cloud of the same colour lies along the terminal margin ; 

 in the hind wing the corresponding borderiug of the terminal margin is slightly darker 



