on the Ephemeride. 109 
Centroptilum pennulatun. 
(Forceps et ala postica, Pl. V. fig. 14, 14a.) 
O. pennulatum, Htn. 1870. 
Imago, v.v.s. ¢. Oculi turbinati carnei, inferiores 
olivacei vel atri. Prothorax supra nigricanus vel furfu- 
rosus; meso- et meta-thoraces fusci vel furfurosi. Ale 
vitrine. Femora alba, apicibus cretaceis; tibiz tarsi- 
que albi, ultimis articulorum vix cervinis. Segmentorum 
abdominis 2-6 vitrina, alba, juncturis vix castaneis ; 
cetera supra castaneo-rubiginosa, infra ochro-leuca. Se- 
te forfexque albz. 
9. Oculi virescenti-grisei: vertex capitis flavus, 
striga lata longitudinali saturate rubiginosa. Tergum 
thoracis furfurosum. Pedes cani, femoribus subcretaceis, 
vel gamboso-albidis. Abdomen supra pallide virescenti- 
griseum, juncturis pallidioribus ; infra pallidum immacu- 
latum: striga dorsalis longitudinalis in medio, apices 
segmentorum, et macule trigonales ex his ad latera pro- 
rectz, lutescentes. Seta pedesque eis maris similes. 
one. corp. 6 8-95.92 8; al. g 2 8; set. ¢ 14-17, 
¢ 11 mm. 
Hab.—The Manifold, lam, Staffordshire, and Grazely, 
near Reading. August to October. 
Centroptilum lituratum. 
Ephemera culiciformis, Scop. 1763 (nee Lin.). Cloe 
litura, Pict. 1843-5; Cloeon litura, Walk. 1853. 
Subimago. ‘“ Alz pallide fuscescenti-grisex. Setze 
fuscee.” 
Imago, 3. “ Oculiturbinatisulphurei. Tergum thoracis 
fuscum, strigi atré im medio a fronte retrorsum sed non 
metathorace tenus attinente: metathorax punctis atris 
duobus. Ale vitrine ; pedes flavescentes. Abdomen rufo- 
fulvum, apicem versus obscurius, maculis lateralibus. 
Sete flavescentes, juncturis atris.” 
9. Flava, oculis nigris, leis rufescentibus parvis 
duabus super mesothoracem, et maculis paucis lateralibus 
super abdomen.”  (Pict.) 
Long. corp. ¢ 8, set. 12, exp. al. 17 mm. 
Hab.—Mt. Saleve (Pict.); in the autumn. 
