sh 
ncaa 
on the Bphemeride. 73 
@ abdomine pallide ochraceo, lineis et strigis fuscis. 
Ale vitrinee: antics: in areis marginalibus et submargi- 
nalibus, posticee margines terminales versus, nigricanti 
tincte. Pedum posteriores saturate virescente grisei, 
juncturis atris. 
Long. corp. ¢ 16, 9 16-23; al. g 16, 2 14-22; set. 
6 35 & 30, 2? 14-25, subim. 17 mm. 
Hab.—Spain (Rbr.); France (Blanch.); England ; 
Lapland (Pict.); Moscow (Oul.) ; Belgium and Germany. 
In brooks, streams, and cold swift rivers; from May to 
July. 
This is the May-fly of anglers. Fishermen apply 
various names to it, according to the state and sex ; thus 
the “Green Drake” (2 subim.), ‘‘ Bastard Drake” ( g 
subim.), and the ‘‘May-fly” (¢ im.). It frequents 
colder and more rapid streams than H. vulgata. Mr. E. 
Brown, of Burton-on-Trent, tells me that on one occasion 
he saw the River Dove almost covered with the sub- 
imago, at a part where it is upwards of twenty or thirty 
feet broad. 
Ephemera glaucops. 
(Forceps, Pl. IV. fig. 9.) 
E. lutea, Sulz. 1776: (nec Lin.). EL. glaucops, Pict. 1843-5. 
Subimago, v.s.s. Als pallide cervino tinctz, nervis 
transversalibus atris rufo-cervino marginatis, ideoque in 
medio alz antice et prope basin maculas formantibus ; 
margines terminales, vel griseo vel rufo-cervino late 
tincti; nervi longitudinales flavescentes. Oculi saturate 
ceesil. 
Imago 3, v.v.s. Oculi supra vel olivacei vel rubi- 
gineo-lutescentes, infra saturate olivacei vel purpureo- 
rubiginei: os flavescens. Corpus rubigineo-luteum vel 
luteum; “ prothorax maculis fuscis duabus” (Pict.). 
Alze vitrine, maculis paucis, et margines terminales versus 
tinctee, longitudinalibus nervorum (transversalibus ipsis 
atris) et marginibus transversalium, atque areis margina- 
hibus et submarginalibus, plus aut minus lutescentibus. 
Pedum antici lutescentes, apud juncturas atri: posteriores 
testacei, juncturis saturatioribus vel virescenti-grisei. 
Segmentorum abdominis posteriora singula strigas atras 
