EEV. A. E. EATON ON EECENT EPHEMERIDiE OR MAYFLIES. 305 



These Species should follow Epliemerella ignita, p. 127. 



Ephemebella notata, sp. noY. Plate LXY. 9 (genitalia). 



Siihimago (living). — Wings Avhitish grey, paler in proximity to the roots in. some lights ; 

 neuration in a large measure coucolorous with the membrane or whitish, but in the fore 

 wing the great cross-vein, the greater portion of the subcosta and radius, and in certain 

 lights the remaining longitudinal nervures, are light greenish yellow approaching yellow- 

 lake. Setse dark vandyke- or reddish-grey with reddish joinings. Hinder legs light 

 olive-grey with greyer tarsi : fore leg of d rather darker. 



Imago, S {Uvlng). — Upper division of eyes light yellowish red (the "yellowish" 

 approaching Mars-yellow, the " red " medium burnt-sienna) ; lower division brownish 

 olive with a movable dark spot. Pronotum bistre-brown ; meso- and metanotum raw- 

 umber-brown ; pleura much lighter in colour. Abdomen above translucent bistre-grey 

 in segments 1-7, with the joinings more or less opaque; segments 8 and 9 raw-umber- 

 brown; segment 10 much lighter than these: venter in segments 1-7 light greenish 

 or ashy grey, marked with black lines and dots as in $ (see below) ; segments 8-10 some- 

 what brown-ochreous, paler along the middle and in segment 9 at the tip ; forceps light 

 greenish grey. Set;x! light warm-sepia grey with reddish joinings. Pore legs dark bistre- 

 grey ; hinder legs rather greener or yellower, and lighter, with the tarsal joinings grey, 

 and brownish ungues. Wings vitreous, with an evanescent yellowish stain in the 

 pterostigmatic region ; longitudinal neuration dull greenish grey ; cross-veinlets more 

 distinct than in E. igiiifa, and those in the pterostigmatic region less regularly forked or 

 connected together than the corresponding veinlets of that species. 



2 {living). — Eyes light olive-green, ^\ ith a movable round black spot ; vertex of head 

 light yellow ; orbits of eyes and of the ocelli black, but the interspace between these 

 last, and two unequal dots on each side of the frontal carina, light brown-ochreous. Pro- 

 notum lighter than the mesonotum, and traversed in rear of the outer ocelli by two 

 longitudinal black stripes that are slightly divergent and dilated posteriorly. Meso- and 

 metanotum light brownish-ochre, ai)proacliing Mars-yellow ; the mesopleura in advance 

 of the wing-roots light yellow. Abdomen in segments 1-7 yellower than in d , the 

 prevailing tint approaching dull yellow-ochre ; the remaining segments rather browner 

 ochre than these ; venter rather lighter than the dorsum : the abdominal markino-s 

 comprise a fine, slightly irregular, transverse brownish line, close to the dorsal joiniu"", 

 at the base of the segment in segments 2-8 or 9, and some l)lackish marks in segments 

 1-8, viz. : — in segment 1 a streak at the side ascending the dorsal joining, a small spot 

 above and an isolated longitudinal line below the pleural projection, and a dot nearly 

 in the middle on each side of the ganglionic tract ; in segments 2-7 a short isolated 

 longitudinal linear streak met by a shorter erect or ascending streak and followed in 

 certain instances by a small dot at the scar of the nymphal tracheal branchia, above 

 the pleuron on each side, and a longer isolated linear longitudinal streak immediately 

 below the pleuron ; also in the same segments a pair of slender clavate streaks, half as 

 long as the segment, divergent posteriorly, produced from the base of each segment ; and 



SECOND SERIES. — ZOOLOGY, VOL. III. 1-1 



