EPHEMERID.«. — ^EPHEMERA. 57 



apicem luteo-fuscescente. (Exp. Alar. 11 lin.: — Long. corp. 4.§ lin.; 1. setar. 

 8§ lin. 



Eph. Stigma. Sieph. Catal. 305. No. 3371. 



Pitchy-brown; thorax in front and abdomen paler, or of a rusty tinge; legs 

 and setsBj or filaments, lurid, and not spotted ; wings hyaline, of a pale 

 yellowish hue and immaculate, the anterior with the costa at the apex 

 luteous-brown. 



I have a single example of this insect, of which I know not the 

 locality. 



Sp. 4. talcosa. Piceo-fusca, abdominis apice pedibus setisque luridis, alis hyalinis 

 immaculatis. (Exp. Alar. 10 lin.: — Long. corp. 4§ Ihi.; 1. setar. 7 lin.) 



Eph. talcosa. Mus. 3Iarsham.—Steph. Catal. 305. A^o. 3372. 



Pitchy-brown, immaculate, with the apex of the abdomen and the legs lurid; 

 filaments the same, but paler; wings transparent, immaculate, nervures 

 very pale ochreous-brown, the costal ones slightly yellowish, and the costa 

 itself towards the apex of a luteous-brown hue. 



Of this species — which I obtained from the Marshamian collection 

 — I am ignorant of its locality. 



Sp. 5. lutea. Lutea, oculis marginibusqve segmentorum abdominis nigris, alis 

 hyalinis, albis, immaculatis, setis nigro punctatis. (Exp. Alar. 10 lin. : — 

 Long. corp. 4 lin.; 1. setar. 6 lin.) 



Eph. lutea. Linne. — Steph. Catal. 305. N'o. 3373. 



Luteous ; eyes and margins of the abdominal segments black ; legs pale 

 luteous, immaculate; filaments also pale luteous, rather closely dotted with 

 black ; wings very clear and transparent white and immaculate, with the 

 nervures slightly luteous, the costal ones brightest. 



Found, but not commonly, within the metropolitan district, in 

 June. 



Sp. 6. marginata. Nigra, alis hy aliens albis, margine exteriore fusco. (Exp. 

 Alar. 10 lin.: — Long. corp. 4 lin. — long. set. 5 lin.) 



Eph. marginata. Linne. — Shaw Gen. Zool. v. vi. pi. 81, Jig. inf.? — Steph. Catal. 

 305. No. 3374. 



Black ; abdomen brownish, with darker rings ; wings hyaline white, with the 

 costa fuscous ; legs pale ; filaments spotted with black, with long articu- 

 lations. 



Found in the vicinity of the metropolis in June, apparently rare. 

 Mandibulata, Vol. VI., 30th April, 1836. h 



