EPHEMERID.f:. BAETIS. 65 



Sp. 8. lateralis. Picea, thorace macula aurantiaca, abdomine ferrugineo lateribus 

 pallidix, alls hyalinis, nervuris 3-bus costalibus carneis. (Exp. Alar. 8 — 9 lin. ; 

 Long. Corp. 3| — 3| lin.; 1. set. 7 lin.) 



Ba. phffiopa. Steph. Catal. 306. No. 3394.— Ba. lateralis. Curtis, Phil. 

 Mag. 1834. 



"Piceous, shining, an orange spot before the wings ; abdomen dull ferrugi- 

 nous, the sides paler, with the spiracles piceous; filaments very long ; 

 wings with the three costal nervures rosy or ferruginous ; legs lurid, 

 excepting the anterior, which are ochreous at the base." — Curtis, l. c. 



Taken, in June, within the metropolitan district. 



Sp. 9. obscura. Piceo-rufa, abdomine pallidiore, setis luridis fusco annulatis, 

 alis hyalinis costa subochraced. (Exp. Alar. Tg lin. ; Long. corp. 3§ lin.; 

 l.set. 6 lin.) 



Ba. obscura. Steph. Catal. 306. No. 3395. 



Dull pitchy-red : abdomen paler, its filaments lurid, long, the joints tipped 

 with fuscous ; legs pale lurid ; wings hyaline, costa somewhat ochreous, 

 the nervures brownish. 



Found at Hertford, &c. in June and July. 



Sp. 10. carnea. Incarnata, abdomine saturatiore, setis immaculatis, alis elon- 

 gatis, hyalinis, costa suhrosea, nervuris subbrunneis. (Exp. Alar. 8| lin. ; 

 Long. corp. SJ lin. ; 1. set. 6\ lin.) 



Ba. carnea. Curtis, Phil. Mag. 1834. — Steph. Nomen. 2d edit. Appendix. 



" Ochreous, with a pink tinge ; abdomen darker ; filaments twice as long as 

 the insect, pale, unspotted ; wings elongated, with the costa slightly tinged, 

 nervures reddish-brown." — Curtis, I. c. 



Also found within the metropolitan district, in June and July. 



B. Wings faintly reticulated. 



Sp. 11. striata. Fusca, abdomine albo maris pellucido, foemincs opaco rufescente, 

 alis hyalinis, nervuris subfuscis. (Exp. Alar. 4 lin.; Long. corp. 3 lin.; 

 1. set. 5 lin.) 



Eph. striata. Linnc. — Ba. striata. Steph. Catal. 306. No. 3393. 



Fuscous : abdomen white, pellucid in the male, opaque and somewhat reddish 

 in the female; filaments short, immaculate; legs lurid; wings hyaline, 

 longitudinal nervures rather brownish. 



Found occasionally within the metropolitan district, in June. 



Sp. 12. bioculata. Ochraceo-lutea, abdominis medio alio diaphano, apice sub- 

 Jusco, pedibus niveis, setis longioribus, albis, fusco punctaiis. (Exp. Alar. 6| — 

 7J lin.; Long. corp. 34 lin. ; 1. set. 3 lin.) 

 Mandibulata, Vol. VI., 15th June, 1836. i 



