26 EEV. A. E. EATON ON EECENT EPHEMEEID.5: OE MATELIES. 



lower maxillse as in the typical form. Lingua acutely ovate ; the paraglossae rather 

 narrow, connivent. Setae about J as long as the body. 



DistribiUion. Indo-Malay region and Irkutzk. 



Ti/pe. F. lata, "Walker. 



Etymology . dvayeveala, regeneration. 



Palingenia sibirica, jVPLach. 



Palingenia sibirica, \ M'^Lacb., Ann. Soc. Ent. Belg. xv. 50, jil. i. 1-lffl (1872). 



Adult 6 {dried). — Pore wings pale yellowish-brown, darkening gradually towards the 

 tip ; neuration for the most part pale, but some of the veinlets in the marginal and sub- 

 marginal areas are blackish. Hinder tarsi with one claw each ; legs whitish. Head 

 pale yellowish ; a black spot at the base of each antenna, a subtriangular blackish spot 

 contiguous with the oculus on each side of the vertex, the sutures of the cranium 

 blackish, and two brownish occipital clouds. Notum blackish ; the borders and median 

 stripe of the prouotum pale. Abdomen above blackish ; the segments pale at the sides, 

 and very narrowly so at the tips ; venter pale. Setae pale, with fine sliort pubescence. 

 Length of body 21 mm. 



Hab. Irkutzk, 20th of May (M'Lach. Mus.). There is a specimen in Baron de Selys- 

 Longchamps's collection. 



Palingenia lata, Walk. Plate I. 1 6 (wing). 



Palingenia lata, ! Walk., List Neiiropt. Brit. Mus. iii. 550 (1853) ; Etn., Trans. Ent. Soc. Lond. (1871), 

 p. 63, pi. iii. 18-18 6 (1871). P. amjAa, M<-Lach., Ann. Soc. Ent. Belg. xv. 50 (1873) [nominal 

 reference — part] . 



Adult {dried) 6 . — Wings and thorax light Vandyke-brown ; the longitudinal neuration 

 of the former, the cross veinlets in the basal half of the disk of the fore wing, and also 

 those contained within the narrow interspaces of the nervures, distributed in pairs to the 

 terminal margin, opaque and dark Vandyke-brown; the fork of the anal nervure (8) 

 encloses a single longitudinal nervure. Femora nearly concolorous with the wings ; the 

 fore femur dark above, the hinder tibiae and tarsi greyer, and transversely rugose. In 

 dried examples the ungues of the hinder tarsi appear to be single. Abdomen faded, 

 fuscous above. Setae very light dull brownish yellow, pilose with uniform hair. Length 

 of body, d , 22, wing 23, setae about 70 mm. 



Eah. Silhet. 



Palingenia ampla, sp. nov, Plate I. Ic (wing). 



Adult {dried) 6 . — Wings (as opaque objects) uniformly deep warm sepia-grey, 

 modified in transmitted light with light sepia-brown, their neui-ation for the most part 

 opaque; in the fore wing, the fork of the anal nervure (8) encloses a single longitudinal 

 nervure. Venter very light bistre-grey modified with equally light Vandyke-grey; 

 hinder femora nearly of the same colour beneath as the venter, but Vandyke-brown 

 above ; fore femora faded ; all the tibiae and tarsi (probably faded) extremely light 

 Vandyke-grey, transversely rugose; the hinder ungues darker and single. Setae light 



