104 Rev. A. E. Eaton’s Monograph 
Imago, v. v.s. &. Oculi turbinati olivacei, vel satu- 
rate virescenti-sulphurei; inferiores atro-picei, vel atro-- 
virentes. Thoracis tergum vel aterrimum, vel fuscum, 
politum. Ale vitrine ; subcosta tertiusque nervorum 
longitudinalium substraminei; nervule apicales arez 
marginalis multe, sparsim conjuncte. Pedes olivacei; 
posteriores tarsis saturatioribus; antici tibiis viridi- 
griseis vel atro-virentibus, et tarsis griseis vel atris. 
Abdominis dorsum piceo-fuscum; venter cinereus, apice 
vix fulvescenti. Forceps virescenti-albus. Setee rubido- 
albze, juncturis rubescentibus. 
? mari simillima. Oculi atri. Caput circa ocellos 
castaneum, lineis vel strigis duabus concoloribus super 
verticem: carina facialis tuberculos duos parvos piceos 
utrinque habet. Abdomen supra luteo-fuscum, juncturis 
luridis, et tracheis subcutaneis obscuris ; subtus oliva- 
ceum, ultimo segmentorum penultimoque stramineis. 
Pedes viridi-olivacei, tibiis tarsisque saturatioribus. 
Long. corp. 6 9, 2 103 al. d 8, ¢ 10-11; set. 1g 
14-15, subim. 9; set. 2 10-14, subim. 7-9 mm. 
Hab.—Near Retford, in Nottinghamshire, and at Quy 
Fen, near Cambridge. September and October ; in still 
water. 
The name simile has reference to the similarity between 
the sexes. 
Cloeon subinfuscatum. 
Otoe subinfuscata, Ramb, 1842. 
Subimago, v.s.s. 9. Ale saturate corvine, nervis 
longitudinalibus luteis: nervule apicales are marginalis 
multe (circa 12) sparsimque divise. Thorax lutescens, 
pedibus luteo-luridis. Setee juncturis obscuris. 
Long. corp. ? 9, al. 11 mm. 
Hab.—Provence. (Rambur.) 
Cloeon obscurum. 
Cloe obscura, Ramb. 1842: nee Curt. 
Subimago, 9, v. s.s. Ala murine, nervis luteis: ner- 
vule apicales are marginalis simplices (circa 8 in nu- 
mero), et irregulariter flexuose. Thorax rufo-testaceus: 
pedes testacei. 
