120 Rey. A. E. Eaton’s Monograph 
Baetis (2) fuscus. 
Cloe fusca, Schn. 18405. 
Imago, ?. “Tergum thoracis fuscum ; alee vitrine, 
nervis fuscis, antica area costali apicem versus fulvescente, 
et nervis transversalibus pluribus. Pedes saturate testa- 
cei. Abdomen supra rufescens, apicibus segmentorum 
brunneis; subtus testaceum. Setz saturate testacex, 
fusco annulate.” 
Long. corp. @ 2°75,” set. 6°25. 
Hab.—Messina. April. (Schn.)* 
Baetis posticatus. 
Cloeon posticata, Say, 1823; Cloe posticata, Hag. 1861. 
Imago, v.s. 6.  Oculi turbinati saturate rufo-fusci. 
Tergum thoracis aterrimum. Ale vitrine. Pedes albi; 
antici vix obscuriores bases (femorum ?) versus. Seg- 
mentorum abdominis 2-7 pallide czrulescenti-hyalina, 
ceetera saturate fusca. Sete albee.”’ (Say.) 
Long. corp. 8, set. 19 mm. 
Hab.—* Shippingsport. End of May.” 
Baetis wnicolor. 
Cloe unicolor, Hag. 1861 (nec Curt., Burm.). 
Imago, s. s. ¢. “Corpus saturate piceum. Ale 
vitrine, interdum nervis longitudinalibus obscuris; pos- 
* The following European species are of uncertain position, and hardly 
recognizable. 
1. Baetis culiciformis. 
Ephemera culiciformis, Lin. 1758. LE. albipennis, Walck. 1802. Cloe 
culiciformis, Pict. 1843-5. 
Imago. ‘Eph. cauda biseta, alis albis, corpore fusco.” (Lin. 1758.) 
‘‘Culice paulo major. Thorax nigricans. Abdomen fuscum. Sete 
caudales longitudine corporis. Tubercula dno supra oculos, crassa, magna, 
livida.”” (Lin. 1761.) 
Hab.—Sweden. 
2. Baetis speciosus. 
Ephemera speciosa, Pod. 1761. 
_ Imago. ‘“E. speciosa, pedibus anticis longissimis cyaneis, alis albis, 
corpore fusco.”’ (Pod.) 
Long. corp. 3 lin. 
Hab.—Incog. 
