78 Rey. A. E. Eaton’s Monograph 
differences will be detected between the maxille and 
maxillary palpi of the typical species of the several series, 
sufficiently marked to require their generic separation. 
Series 1. Sp. typica, DL. australis. 
Imago. Tarsus posticus veluti in Potamantho, sed 
unguibus conformibus uncinatis. Setarum trium media 
quidem est longa, et ceteris subzqualis: plerumquoe 
tamen abrumpitur, igiturque cauda biseta esse videtur. 
Forcipis artus tri-articulati, proximo articulorum longis- 
simo. Coste alarum posticarum haud excisee sunt (nisi 
‘in DL. auriculata). 
Occurrunt species in Australia, et circa litora Oceani 
Indici usque ad Promontorium Spei Bone. 
Leptophlebia australis. 
(Genitalia maris, Pl. IV. fig. 14, 14a. Ale anticee arezw 
marg’. apex, fig. 14b.) 
Ephemera australis, Walk. 1853. 
Subimago, v. s.s. Alarum anticarum nervi transver- 
sales fusco vel virescenti-griseo marginati, marginibus 
plus aut minus coufluentibus: paucitas illorum spatium 
lambda-forme clarum relinquit, quod apicem angulumque 
analem oblique interjacit, atque ad basin alee crus breve 
emittit. 
Imago, v.s.s. ¢. Tergum thoracis piceum, politum. 
Ale vitrine, nervis luteo-piceis, et apice areze marginalis 
antic sub-virescenti-griseo, nervulis transversalibus nu- 
merosis obliquis et subrectis. Pedum antici fusco-picei, 
posteriores flavescentes, femoribus obscure nigro bicinctis, 
et tarsis testaceis. Abdomen luteo-fuscum vel luteo- 
castaneum. Sete pices. 
Long. corp. & 7-10, al. 9-11, set. 23 & 22 mm. 
Hab.—Tasmania. (Brit. Mus.) 
Leptophlebia australasica, 
(Ala antica, Pl. IL. fig. 2. Genitalia maris, Pl. IV. 
fir. 15, 15 a, b.) 
Baetis australasica, Pict. 1843-5. 
Subimago, s.s. ‘ Ale nigricantes, nervis saturatiori- 
bus.” (Pict. e figura.) 
