EEV. A. E. EATON O]^ EECEJ^T EPHEMEEID.E OE MAYFLIES. 183 



pars V. 2630 (1790) ; Eos., Fn. Etrusc. ii. 9 (1790) ; 01., Encyc. Meth. vi. 420 (1791) ; Fab., Ent. Syst. 

 emend, iii. pars i. 71 (1793) ; Schr., Pn. Boica, ii. pars ii. 199 (1798) ; Lat., Hist. Nat. Crust, et Ids. xiii. 

 99 (1805) ; Shaw, Gen. Zool. vi. pars ii. 253 (1806) ; Lat., Gen. Crust, et Ins. iii. 184 (1807) ; Cuv., 

 Eegn. An. ed. 1, iii. 130 (1817) ; Lamarck, Hist. Nat. An. s.-verteb. ed. 1, iv. 221 (1817) ; Sam., Ent. 

 Comp. p. 259 (1819) ; Cuv., Eegn. An. ed. 2, v. 244 (1829) ; Zet., Ins. Lap. col. 1046 (1840) ; Voigt, 

 Lekrb. d. Zool. v. 311 (1840) ; Blancli., Hist. Nat. lus. iii. 55 (1840) ; Dufour, Mem. par divers savans, 

 lust, de France, viii. 580 note (1841) j Lat., Nouv. Diet, d'liist. Nat. x. 349 (1847) ; Verloreu, Mem. 

 Couron. Acad. Eoy. Belg. xis. 49, pi. i. (1847); Blanch., Cuv. Rt^gn. An., ed. Crochard, xiii. 92 (1848); 

 Carus, Icon. Zootom. tab. xv. 6 [anatomy] (1857). — E. annulata k, E.X striata, Mull., Zool. Dan. Prod. 

 143 (1776).—^. X marginata, Gor. & Prit., Nat. Hist. Obj. for Micros. [*ed. i.] ed. iii. 01-9, pi. ii. 4-6 

 (1829) ; Bowerb., Ent. Mag. i. 239-44, pi. ii. 1-6 (1833) ; Lacord., Introd. JlTEnt. ii. 77 (1838) ; Brulle, 

 Blanch. Hist. Nat. Ins. i. p. xxiv. (1840) [nymph]. — E. % culiciformis,Yons,co\., Ann. Soc. Ent. Fr. (2) iv. 

 49 [misprinted calciform'is] (1846). 



Cloeon pallida, Leach MS., Brewst. Edinb. Encyc. ix. 137 (1815); Sam., Ent. Comp. 259 (1819).— 

 C. marmoratum [ ? im.] & obscurum [subim.]. Curt., Lond. & Edinb. Phil. Mag. (3) iv. 121 (1834). — 

 C. cognation], J dimidiatum\, & consohrrnum\, Steph., 111. Brit. Ent. vi. 69 (1835) ; Walk., List of 

 Nem-opt. lus. in Brit. Mus. part iii. 579 [misprint, cognata'] (1853) [J" im.] . — C. virgo, ! Steph., 111. &c. 

 p. 70 (1835) ; 'Walk., List &c., p. 580 (1853) [S im-]- — C. dipterum, Leach IMS., Brewst. Edinb. Encyc. 

 ix. 137 (1815) ; Curt., Lond. & Edinb. Phil. Mag. (3) iv. 121 (1834) ; ! Steph., 111. Brit. Eut. vi. 68, 

 pi. xxix. 3 (1835) [misprint, diptera) ; Walk., List &c. p. 575 (1853) ; Hag., Ent. Ann. 1863, p. 29 ; 

 Etn., Ent. Mo. Mag. v. 87 (1868) ; id., Trans. Eut. Soc. Lond. (1871) p. 102, pi. v. 10 [forceps] ; Hag., 

 op. cit. (1873) p. 399 [nymph] ; Meyer-Diir, Bull. Soc. Ent. Suisse, iv. 311 (1874); ! M-^Lach., Trans. 

 Ent. Soc. Lond. (1875) 171 ; Palm^n, Morphol. Trach.-Syst. SS. 1-21 &28, taf. i. 7-9 [anatom.] (1877) ; 

 Eostock, Jahresb. d. ver. f. Naturk. Zwickau (1877) p. 80 (1878); Palmen, Paar. Ausf. gauge d. Geschl. 

 org. b. Insect. S. 64 [anatom.] (1884). 



Cloe dlptera, Bm-m., Haudb. d. Ent. Bd. ii. Abth. ii. 798 (1839); ! Pict., Hist. Nat. Nevropt. ii. 

 Eph^m. 266, pi. xliii. (1843-5) ; Schn., Stet. Ent. Zeit. vi. 340 (1845) ; Calori, Nouv. Ann. Sc. Nat. 

 Bologna (2) ix. 38-53, pis. ii.-iii. [viviparition] (1848) [translat, Joly, Bull. Soc. d'Etud. Sc. Nat. Nimes, 

 5" ann. No. 8 [Sep. pp. 1-18] pis. ii, iii. (1877) ; Brau., Neuropt. Austr. 26 (1857) ; Leunis, Synop. 

 Naturgesch. Thicrreichs, ed. 2, p. 636 (1860) ; Karsch, Die lusecteuwelt, v. 400-2 (1863) ; Gerstiick., 

 Handb. d. Zool. ii. 59-61 (1863) ; Hag., Ann. Soc. Ent. Fr. (1864), p. 39; id., Ent. Mo. Mag. ii. 25 

 (1865) ; Ed. Pict., Nevropt. d'Espag. 25 (1865) ; Ouliauiue, Neui'opt. & Orthopt. prov. Moscow, p. 27 

 (1867) ; Ausser., Ann. del. Soc. Natur. Modena, Ann. iv. 135 (1869) ; ! Joly, Bull. Soc. d'Et. Sc. 

 d'Augers, 1876 [Sep. p. 42] note d [vivipar.] (1876) ; ! id., Bull. Soc. d'Etud. Sc. Nat. Nimes, 5' Ann. 

 no. 8 [Sep. pp. 21-25] notes b-i (1877) ; ! id.. Bull. Soc. d'Etud. Sc. d'Augers, 1878-80, pp. 169 & 172 

 (1880) ; Ciaccio, Rendicont. del. session, del. Accad. d. Scien. ec. di Bologna (1880) [anatom.]. — 

 C. «^/M*, ! Ramb., Hist. Nat. Nevropt. 298 (1842) [^ im.'j.—C. cognata & ot>v/o, Pict., Hist. Nat. 

 Nevropt. ii. Ephem. 272 (1843-5) [ ^ im.] .— C. apicalis, ! Costa, Atti d. R. Acad. d. Sc. fisic. e mathemat. 

 diNapoli, ix. 34 (1882) \_^ subim.]. 



Chloeon dipterum, Lubbock, Trans. Linn. Soc. xxv. pi. lix. 19-21 (1865). 



Clo'eopsis dijjtera, ! Etn., Ann. & Mag. Nat. Hist. (3) xviii. 146 [excl. var.] (1866). 



Siibimago {living), ? .—Wings light blackish grey or dusky. Oculi dark fusco- 

 olivaceous. On each side of the venter, in segments 2-7 in the ? (2 -8 in the d ) is a 

 ruhiginose longitudinal line ; the lines are represented by two dashes at the base of the 

 9th segment in the ? . 



Imago {living). — Wings colourless in the 6 , ornamented in the ? with amber-colour 

 along the costa ; the marginal area in the d is free from cross veinlets as far as the 



