118 Rey. A. HE. Eaton’s Monograph 
Baetis alpinus. 
Cloe alpina, Pict. 1843-5 ; Cloeon alpina, Walk. 1853. 
Imago, 3. “Oculi rufi. Tergum thoracis saturate 
fuscum. Als vitrez, nervis fulvis, paucis distinctioribus 
in ares marginalis apice. Abdomen fuscum, juncturis 
albidis ; setee albze, juncturis fuscis.” —(Pict.) 
Long. corp. ¢ LO, set. 11, exp. al. 23 mm. 
Hab.—A stream from Mt. Brevent in the valley of 
Chamounix, in August. (Pict.) 
Baetis melanonyz. 
Cloe melanonyx, Pict. 1843-5; Cloeon melanonyx, Walk. — 
1853. 
Imago, ¢. ‘ Corpus saturate fuscum, ventre pallidiore. 
Oculi turbinati rufi. Pedum antici fusci; posteriores 
cretacei, unguibus atris. Ale vitrez, nervis fuscis, 
transversalibus subtilissimis. Setze flavescentes, junc- 
turis fuscis.””? (Pict.) : 
Long. corp. ¢ 7, set. 9, exp. al. 18 mm. 
Hab.—La Valle d’Entremont, Faucigny ; at the end of 
June. (Were the eyes reddened in alcohol ?). 
Baetis pumilus. 
(Forceps et ala postica, Pl. V. fig. 25, 25a.) 
Ephemera mutica (?), Lin. 1758=L. striata, Lin. 1761. 
Cloe pumila, Burm. 1839. C. striata (?), Pict. 1843-5. 
Cloeon pumila, Walk. 1853. B. pumilus, Ktn. 1870. 
Subimago, v. v.s. Ale anthracine: pedes virescenti- 
grisel, tarsis nigricantibus ; sete nigricantes. 
Imago, v. v. s. g@. Oculi turbinati atro-fuliginosi. 
Tergum thoracis aterrimum, politum. Ale vitrine, ful- 
gore talcoso. Pedes albi, tarsis, apicibus tibiarum, femo- 
ribusque anticis, nigricantibus. Segmentorum abdominis 
2-7 alba, pellucida; cetera supra furfuroso-fusca vel 
fusco-castanea, subtus fusca. Forceps et sete albe. 
?. Capitis vertex strigis duabus piceo-rufescentibus. 
Tergum thoracis atrum. Pedes virescenti-grisei, tarsis 
fuscis. Abdomen supra fusco-furfurosum, juncturis, et 
