62 EEV. A. E. EATON ON EECENT EPHETHEEID.^ OE MAYFLIES. 



111. Brit. Ent. vi. 56 (1835) ; Curt., Brit. Ent. xv. no. & pi. 708 (1838). E. hispanica, ! Ramb., Hist. Nat. 

 d. Ins. Nerropt. 294 (1842) ; Walk., List of Neuropt. Ins. in Brit. Mus. 535 (1853) ; E. Pict., Nevropt. 

 d'Esp. 23 (1865). 



Subimago {living). — Wings at first yellowish green or greenisli grey, becoming greyer, 

 very narrowly edged Tvith grey-black along the extreme terminal margin, the discal 

 spots and, in the fore wings, most of the cross veinlets black, the rest of the neuration 

 concolorous with the wing-membrane, or yellowish green. Head in ? dull pale 

 ochreous tinged with green, the vertex somewhat lutescent, and between the ocelli 

 blackened or pitch-brown ; oculi deep sepia-brown. Notum at first blackened, with 

 lutescent markings ; the pronotum grey-black, tinged with greenish along the middle, 

 and with a large similarly coloured pale blotch on each side ; mesonotum lutescent, with a 

 mitriform blotch in front bisected longitudinally by a fine line, from whose base on each 

 side a curved black streak recedes inside the wing to the hind border of the segment, 

 gradually expanding towards its termination, where it is flanked inside by an acutely 

 triangular spot ; tegulae pale yellowish green ; metanotum grey -black with pale sutures. 

 Setae black. 



Imago (Iwing). — d . Head and thorax above deep blue-black, polished ; the pro- 

 notum at the edges, and the joining of the head and thorax, also a fine line on each side 

 of the mesonotum in advance of the teguloe very pale ochraceous ; oculi deep sepia- 

 brown above, brown- black beneath; third joint and awn of antennae black-brown; face 

 and prosternum pale greenish yellow. Abdomen with the foremost four or five dorsal 

 segments ivory-white, with a pale cinereous broad triangular blotch at their base on 

 each side, pointing backwards ; the hinder segments varied with pitch-brown or very 

 deep brown-ochre instead of with cinereous, their markings sometimes confluent (leaving 

 in the middle an ivory-white triangle upon the hind margin of the segment pointing 

 forwards), sometimes differentiated into an abbreviated thin streak on each side of the 

 dorsal vessel at the base of the segment, flanked by a longer and broader tapering streak 

 which falls short of the hind margin of the segment and does not extend to the side. 

 The larger of these streaks are represented sometimes by triangular spots in some of the 

 more forward segments ; last segment altogether dark above. The spiracular region is 

 edged with an irregular dark line above, and an abbreviated line from the base below, in 

 every segment. Venter somewhat tinged with brown-ochre, especially in the hinder 

 segments, and marked in segments 2-8 or 9 with a pau' of subparallel linear brown-black 

 streaks, some of which are slightly connivent in front and abruptly pointed behind. 

 Wings faintly grey-tinted, most distinctly so towards the anterior and terminal margins 

 and in contiguity with their black neuration ; the spots pitch-brown, placed somewhat 

 as in E. vulgata, but less strongly marked. Legs pitch-black, the hinder pairs tinged 

 with olivaceous, and with their joinings darkened. Forceps intense sepia-brown. Setae 

 black. 



$ very like the S , but with the dorsal markings of the pale ochraceous abdomen 

 better defined. Eore legs with piceous femora, and olive-grey tibiae and tarsi ; the tibiae 

 at both extremities, and the apices of the tarsal joints darkened ; hind legs olive-grey, 

 the coxa, trochanter, ungues, and tarsal joinings, the base and extreme tip of the tibia, 



