126 EEV. A. E. EATON ON RECENT EPHEMEEID.E OK MAYFLIES. 



longer and sharper setulae, mingled with minute spreading hairs, while the joints become 

 narrowly plumose or distichously pubescent; towards their extremities the joints are 

 again nude, and their joinings beset with yerticils of very minute hairs. Palpus of 

 maxilla i. about | as long as the lacinia ; its terminal joint is subequal in length to the 

 remainder, and joint 2 is longer than joint 1. Lacinise of maxilla ii. broader than the 

 lobes of the labium. Hind leg the longest ; the tarsus (claw excluded) about ^ as long 

 as the tibia. Eore femur smooth underneath in the typical species ; the tarsus nearly 

 I as long as the tibia. Antennae setaceous, of moderate length, with minute verticillate 

 hairs at the joinings. 



Si/nonymi/. Leptophlehia, Westwood, 1840 (part) ; Potamanthus, Pictet, 1843-5 (part). 



Type. E. excrucians, Walsh. 



Distribution. Northern Temperate E-egions. 



Etymology. A hybrid combination of a Greek derivative with the Latin diminutive 

 "ella." 



Nym])hs of the typical form inhabit N. America as well as Europe. E. ignita 6 im., 

 Avith L. marginata 2 im., were contypical of the unrestricted Leptophlebia. 



Ephemerella ignita, Poda. Plate XIV. a (legs, d head and forceps). 



Ephemera ignita, Poda, Ins. Mus. Grsec. 97 (1761). — E. eryltiroplitJiahna, Schr., Fn. Boica, ii. pars ii. 

 197 (1798).— £. Xfusca,\ & diluta, Steph., 111. Brit. Eiit. vi. 58 (1835).— E. apicalis,\ rufescens,\ & 

 rosea, ! id., op.cit. vi. 59 (1835). 



X Baetis obscura, ! id., op. cit. vi. 05 (1835) ; Walk., List of Neuropt. lus. iu Brit. Mus. part iii. 558 

 (1853). 



Potamanthus erylhropht/talmiis, Pict., Hist. Nat. Nevropt. ii. Epbem. 232, pis. xxix. [written iu error 

 " erytlirocephalus (larvc) "] & sxx. [adult] (1813-5) ; Walk., List &c. 544 (1853) ; Hag., Eut. Ann. 

 (1863), 21.— ? P. ffibbus, Pict., Hist. &c. 226, pis. xxxi. &xxxii. [im. & subim.] (1843-5) ; Walk., List 

 &e. 544 (1853).— ? P. fcneus, Pict., Hist. &c. 229, pi. xxxiii. [egg, nymph, subim., & adult] (1843-5); 

 Walk., List &c. 545 (1853).— P. apicalis, Pict., Hist. &c. 236 (1813-5) ; Walk., List &c. 544 (1853).— 

 P. dilectus [for dilutus], Pict., Hist. &c. 236 (1843-5).— P. dilutus, Walk., List &c. 545 (1853) ; Hag., 

 Ent. Ann. (1863), 19.— P. roseus, Pict., Hist. &e. 236 (1843-5) ; Walk., List &c. 545 (1853). 



Ephemerella ignita, ! Etn., Trans. Eut. Soc. London (1871), 98, pis. ii. 5 [wiug] & v. 7-7 a [details] ; 

 Meyer-Diir, Bull. Soc. Ent. Suisse iv. 310 (1874) ; Rostock, Jahresb. d. Ver. f. Naturk. Zwickau, 1877, 

 p. 85 (1878).— ?£. yibba, Etn., Trans. Ent. Soc. Loudon (1871), 99; Meyer-Dur, Bull. Soc. Ent. 

 Suisse, iv. 316 (1874) ; Rostock, Jabresb. d. Ver. f. Naturk. Zwickau, 1877, p. 85 (1878).— ?E. (Bnea, 

 Etn., Trans. Eut. Soc. London (1871), 99; Meyer-Diir, Bull. Soc. Ent. Suisse, iv. 316 (1874). 



Suhimago {living).— Wui^s> black-grey, the wing-roots and sometimes the hind wings 

 greyish white. Eernora olive-grey, often with a dark band before tlieir distal extremity ; 

 tibiae grey ; tarsi black-grey or grey-black. Sette brownish grey with red-brown joinings. 



Imago, 6 {living). — Upper division of eyes brownish red or burnt sienna; lower divi- 

 sion olivaceous, or sometimes rather yellower. Head and prothorax olivaceo-fuscous ; 

 meso- and metanotum fuscous or jet-black. Abdomen above dark reddish fuscous, with 

 the opaque tips of the segments sometimes narrowly ochraceous, and often with the sides 

 of the segments tinged with the same colour ; the last segment paler, sometimes dull 

 greenish : venter sometimes light- or warm-sepia brown, sometimes fuscous or greenish 



