EEV. A. E. EATON OX RECENT EPIlEMERIDyE OR MAYFLIES. 293 



EcDYURTJS FALLAx, Hagen. 



t Baetisfallax, ! Hag., Ann. Soc. Ent. Fr. (1864) 38.— t B. seirdoa, ! Costa, Atti del. R. Accad. d. Sc. 

 fisic. e matemat. di Napoli, ix. 34 (1882). 



Heptagenia % zebrata, ! Etu., Trans. Ent. Soc. London (1871) 155, j)l. vi. 28 [detail (part.)], vide Hag. 

 &Etn., op. clt. (1873) 406. 



Imago {dried), <? . — Notum raw umber-brown, varied posteriorly with darker. " Ab- 

 domen lighter than in JH. angustipennis, brown ochreous, with the hinder borders of the 

 dorsal segments black. Setne dull yellowish, darker towards the roots." [After Hagen.] 

 Fore leg in opaque view dark raw umbcr-brown, with the tarsus, in some postures, the 

 tibia, the knee narrowly, and a darker broad band about the middle of the femur 

 pitch-brown. Hinder femora and tibise bi opaque vieio very light raw-umber, in other 

 positions yellower, and in transmitted light yellowish amber-colour, with a similar 

 pitch-brown or blackish band about the middle of the former, and with the knee 

 slightly brownish ; tarsi brownish, either dark raw umber or sepia, according to posture. 

 Wings vitreous, with pitch-brown ncuration ; the cross-veinlets in some postures appear 

 much darker tlian the longitudinal nervures, but in other postures the colouring is 

 uniform, although the cross-veinlets are strongly marked : in the only specimen examined 

 by me the pterostigmatic cross-veinlets of the fore wing are almost without exception 

 branchless, and somewhat evenly distributed. Length of wing 8-9 mm. 



Eab. Corsica (Hag.) ; Gennargento, Sardinia (Costa). The specimen labelled E. 

 sordoa in Costa's handwriting, and kindly communicated to me by him, is a defective d 

 im., of « hich the abdomen is lacking. Judging from Hagen's description of fallax, 

 there need be little doubt as to the identity in species of the insects to which the above 

 names were applied : I have therefore relied largely upon Costa's specimen in this 

 description. 



EcDYURUS ANNTJLiFER, Walker. 



X Palingeriia annulifcra, ! Walk., Trans. Ent. Soc. Loudon, N.S. v. 199 (1860). 

 Heptagenia annulifera, ! Etu., ojo. «7. (1871) 148. 



Imago (dried), 9 . — Thorax somewliat brown-ochreous above, darker in the middle 

 than at tlie sides of the pro- and mesonotum. Abdomen testaceous, witli a stripe down 

 the middle of the back, the hinder borders of the segments, and with the usual broad 

 oblique lateral stripes at the sides, black. Setae light-brownish white, with the alternate 

 joinings black. " Legs whitish, the femur banded with black " [teste Walker). Wings 

 vitreous with pellucid nervures, but with the cross-veinlets and the portions of the longi- 

 tudinal nervures in close proximity to them pitch-brown and narrowly edged with the 

 same colour. Length of body ? G ; wing 8 ; setae 10 mm., or more. 



Hab. Hiudostan. 



** Penis-lobes ohovate. 



EcTDTJRUS AFFiNis, sp. nov. Plate XXIV. 4G(? (penis). 



Imago {dried), 6 . — Notum bright reddish brown or ferrugineo-piceous in part, some- 

 times approaching pitch-brown behind ; tlie pleura are paler than in K lateralis, and 



