86 REV. A. E. EATON ON EECENT EPHEMEEID.E OE MAYFLIES. 



Imago {dried). — Thorax glossy, dark chestnut-brown. Abdomen in 6 above, as far 

 as the base of the 6th segment, translucent whitish tinged with fuscous, the remainder 

 fuscous, all the segments narrowly margined with pitch-black at the joinings ; venter 

 similarly pale to the seventh segment, and then fuscous or ochraceous, and likewise 

 piceous at the joinings ; in the ? type all is discoloured. Setaj light sepia-broAvn ; forceps 

 defective in the type. Legs in $ with pale flavescent femora banded broadly in the 

 middle and narrowly at the tip with black, the tibiae and tarsi pale dull burnt-umber 

 brown ; the hinder legs of 6 are paler, with sepia-brown tibia and tarsus ; its fore legs 

 are lost. Wings vitreous, with piceous neuration and a rounded brown-tinted cloud at 

 the wing-roots ; cross veinlets in the pterostigmatic space about 10 in number in d , 13 

 in 5 . Length of body, s 8 ; wing, d 9'5, ? 8 ; setae, 6 about 23, $ 16 mm. 



Hab. Eainbodde, Ceylon, at an altitude of over 4000 feet (Hag. Mus.). 



Atalophlebia austkalis, Walk. 



X Ephemera avstralis, ! Walk., List of Neuropt. Ins. in Brit. Mus. part iii. 538. 

 Leptophlebia australis, ! Etn., Trans. Eut. Soc. London (1871), 78, pi. iv. 14—14 i [details]. 

 Atalophlebia [type] australis, ! Etn., Ent. Mo. Mag. xvii. 193 (1881). 



Subimago {dried). — Wing neuration pitch-brown, the cross veinlets 1)ordered with light 

 bistre-brown, their bordering in the fore wing confluent along the sides, of a lambda- 

 shaped space free from cross veinlets and colouring, the long stroke of the letter being 

 represented by a narrow clearing describing a gentle curve from the apex to the anal 

 angle of the wing, and the sliort stroke by another narrow clearing running out from 

 the midst of the wing-roots to the former. In some specimens the short clearing at the 

 base of the wing is isolated by colouring from the longer clearing. 



Imago {dried), d . — Thorax pitch-black above. Abdomen rufo-piceous above ; venter 

 dull light burnt-umber, appi^oaching rusty brown. Setre light rufo-piceous. Wings 

 vitreous, their neuration light pilch-brown ; tlic pterostigmatic space of the fore wing, 

 tinged with greenish grey, contains many oblique nearly straight cross veinlets sparingly 

 conjoined ; the marginal area contains, approximately, 7-9 cross veinlets before the bulla, 

 and 21 between it and the apex of the wing. Fore legs with the femur pitch-brown, the 

 tibia pitch-black, and the tarsus light burnt-umber ; hinder legs rufo-piceous, with rather 

 lighter tarsus, and with a faint black band in the middle and another at the tip of the 

 femur. Length of body, 6 7-10 ; wing 9-11 ; setae 23 & 22 mm. 



Hub. Tasmania (Brit. Mus.). 



Atalophlebia atjstralasica, Pict. PL X. 16 c (wings and penis). 



XBaetis australasica, Pict., Hist. Nat. Nevropt. ii. Ejihem. 189, pi. .^xiv. 1, 2 (1843-5); Walk., List of 

 Neuropt. Ins. in Brit. Mus. part iii. 559. 



Leptophlebia australasica, ! Etn., Trans. Ent. Soc. London (1871), 78, pis. ii. 2 [wing], and iv. 15-15 6 

 [details] . 



Subimago (after Pictet's figure). — Wings light black-grey, with dark neuration. 



Imago {dried). — Thorax pitch-black above. Abdomen in segments 2-8 rufo-luteous 

 marked with pitch-black, viz. each segment with an al)breviated black line from the base 

 in the middle, a round black spot on each side of the middle at the tip, and a stripe on 



