24 REV. A. E. EATON ON EECENT EPHE-AIEEID^ OE MAYELIES. 



Palingenia longicauda, Oliv. Plate I. 1 « (wings, legs, d 2 , head and forceps, 

 6 adnlt). 



Hemerobius, Clutius, Opusc. 2, cap. viii. (frontispiece), p. 100 (1634). 



Ephemerum, Swam., Epliem. vita (1675) ; idem, ed. Tyson, p. 44, pis. i.-iv. and v. 2 (young) ; pi. v. 

 1, 3, &c., viii. [adult] (1681); SchiefFer, Ic. iii. tab. cciv. 3 (1776). Ladislaus Gorove, alias Stefan 

 Goseve, in Tudomanyos gyiij tem^ny, viii. [Egy kulonos tiinemenynek, az ugynevezett Tisza viragzas 

 nach leiraza], pp. 22, tab. 1, a-c (young), e (last moult), f (slough), g c?, d $ im. [A very full account] 

 (1819) . Reprinted by Mocsary, in Rev. d. Inhaltes der Termeszetrajze Furzetek, ii. 124-5, and (German- 

 text) natiir. historische. Heft ii. Bd. ii. u. iii. 181-2) (1878). 



Ephemera longicauda, Oliv., Euc. Meth. vi. 418 (1791) ; Latreille, H. N. xiii. 96 (1805) ; Lamarck, H. N. 

 ed. i. iv. 221 (1817) ; ! Ramb., Nevropt. 295 (1842). E.flos-acjiue, Illiger, Mag. f. Ins. i. 187-8, no. 17 

 (1802); Treipke, Stet. ent. Zeit. i. 54-8 (1840). E. Sivammerdiana, ! Lat., H. N. xiii. 96 (1805) ; 

 idem, Gen. iii. 184 (1807) ; Cmder, R. A. ed. I. iii. 430 (1817) ; ditto, ed. II. v. 244 (1829); Lamarck, H. N. 

 ed. I. iv. 221 (1817) ; Blancbard, H. N. Ins. iii. 54 (1840) ; idem, in Cuv., R. A., ed. Crochard, xiii. 91 

 (1848). E. Swammerdamiana, Sliaw, Gen. Zool. vi. part 2, pi. Ixxxii. (1806). 



X Semblis marginata, Panzer, in Explic. Scbajf. Ic. cciv. (1804). 



Palingenia longicauda, Burmeister, Haudb. ii. 803 (1839) ; H.-Schtef., Fn. Ratisb. 346 (1840) ; Pictet. 

 Nat. Hist. Ndwopt. ii. Epbem. 155, pis. xiv. xiv bis, xvi. (1843-45) ; Cornelius^ Beitr. z. Kenntu. d. 

 P. lofigicauda, pp. 38, pis. i.-iv. (1848) ; Walker, Cat. 549 (1853) ; Hagen, Stet. ent. Zeit. xv. 316-19 

 (1854); Perty, Die Zool., Th. ii. 344-45 (1855) ; Hag., Stet. ent. Zeit. xx. 431 (1859); Loew, Verb, 

 zool.-bot. Ges. Wien, xi. 409-10 (1861) ; Corn., Stet. ent. Zeit. xxiii. 465-66 (1862) ; Gerstacker, 

 Handb. d. Zoologie, ii. 59-61 (1863) ; Karsch, Die Insectenwelt, v. 400-2 (1863) ; Eaton, Trans. 

 Ent. Soc. Lond. 1871, p. 62, pis. 17-17 a (1871); Joly, Mem. Soc. d. Sc. Nat. Cherbourg, xvi. 

 pi. i. 2 [after Swammerd.] (1872) ; Hag., Trans. Ent. Soc. Lond. 1873, pp. 385-86 and 392 (1873) ; 

 N. & E. Joly, Rev. Sc. Nat. v. 10, and pp. 324-26, pis. vi. 2, ix. 39-41 (1876) ; Mocsary [vide 

 Ephemerum, Swam. &c. supra] (1878) ; Rostock, Jahresb. d. Ver. f. Naturk. Zwickau, 1877, p. 82 

 (1878). 



Adult {dried) 6 . — Wings dull translucent brownish, of a tint intermediate between 

 medium sepia and medium Cologne-earth, with opaque ncuration and slightly yellowish 

 wing-roots. The first of the subsidiary nervurcs contained within the fork of the anal 

 nervure (8) is rather unstable in its arrangement. Setae, venter, legs, and underside of the 

 thorax light bright yellow, excepting the tibice and tarsi, which are very light brownish ; 

 the pronotum dull light waxy-yellow, the mesonotum slightly browner. Head pitch- 

 black. Dorsum of abdomen intense sepia. 



S . Wings very slightly lighter than in the 6 . Pronotum, meso- and metanotum of 

 a medium Cologne-earth brown, which colour borders the occipital margin of the 

 vertex. Seta? light brownish yellow. Length of body, d 23-25, $ 27*5-29; wing, 

 6 24-26, $ 31 ; setaj, 6 70-74 & 1-5, 2 26-27-5 mm. 



Mab. The large rivers of middle Europe from Rotterdam to Hungary, also near Cette. 

 This last locality is quoted on account of a nyiuph in the Museum of Comparative 

 Zoology, Cambridge, Mass. According to Mr. Snellen of Rotterdam, Swammerdam's 

 statement that this species appears in vast multitudes during one or two evenings only 

 every year, " on or about the Peast of St. John," is generally correct, but the date of 

 the swarm is liable to be earlier in warm seasons, sometimes as early as the 10th 

 of June. 



