98 Rev. A. E. Eaton’s Monograph 
Genus HpHEMERELLA. 
(Ala antica, Pl. IT. fig. 5.) 
Ephemera, p., Pod. 1761; Potamanthus, p., Pict. 
1843-5 ; Potamanthus, restrict., Hag. 1849 ; Hphemerella, 
Walsh, 1862.* 
Nympha reptans, laminis branchialibus complexis qua- 
tuor. Seementorum branchiifera sunt 4, 5, 6 et septimum. 
Palpi maxillares tri-articulati: superiores brevissim1, ulti- 
mis articulorum penultimis longioribus ; inferiores duo- 
bus prioribus articulorum subeequalibus, ultimis brevis- 
simis. 
Hi Leptophlebice subimaginis habitus similis est. 
Imago. Ale quatuor; sete tres, subeequales; oculi 
maris sub-partiti. Tarsi quinque-articulati; articuloram 
proximus obsolescens, tibiee adnatus, secundus tertio sub- 
eequalis, quartus brevior: ungues dissimiles. Pes forcipis 
tri-articulatus, secundo articulorum longissimo. Lamina 
? ventralis e penultimo segmentorum ; sed ovivalvula 
caret. 
Ephemerella ignita. 
(Genitalia maris, Pl. V. fig. 7. Ala postica, fig. 7a.) 
Ephemera ignita, Pod. 1761. LF. erythropthalma, Schr. 
1798. H. fusca, diluta, apicalis, rufescens, rosea & Baetis 
obscura, Ste. 1835-6; Potamanthus erythropthalmus, api- 
calis, dilectus, roseus & erythrocephalus, Pict. 1843-5. 
Subimago, v.v.s. Alarum antice saturate cinerex, 
posticee albo-cervinee. 
Imago, v. v. s. @. Oculi supra brunneo-carnei, vel 
carnei ; partes inferiores olivacee vel flavo-olivaceze. Tho- 
racis tergum fuscum, Ale vitrine, crassioribus nervo- 
rum longitudinalium cum punctis nodalibus vix piceis, 
vel electro-coloratis. Pedes peene sulphurei: antici tibus 
lutescentibus, et tarsis obscure testaceis; posteriores 
tarsis testaceis. Abdomen supra saturate fuscum, lateri- 
bus juncturisque ochraceis; subtus hepaticoloratum, in- 
terdum fuliginoso tinctum, lineis brevibus divergentibus 
* Ephemerella, Schimp (1850, or 1860), is a genus of the Phascei, an 
order of the Acrocarpous section of the Mosses. 
