156 Rey. A. E. Eaton’s Monograph 
fusci, tarsis piceis. Nervi alarum fusci. Venter vires- 
centi-fuliginosus; forceps ater; setee saturate fuliginosz. 
Reliqua veluti in femina. 
?. Oculi atro-fuliginosi. Thoracis tergum aterrimum, 
politum. Alze vitrine, nervis piceis. Pedum antici atro- 
picei, tarsis atris ; posteriores saturate picei, femoribus 
vix annulatis, et tarsis atris. Abdomen supra hepatico- 
fuscum, apicibus segmentorum vix obscuris, nisi ma- 
culis trigonalibus apud latera obscuris: venter fuscus, 
juncturis virescenti-griseis, et interdum plexu nervorum 
ventralium penultimi segmentorum vix hepaticolorato. 
Setze corvine. Processus ventralis penultimi segmento- 
rum integer. 
Long. corp. ¢ 5-9, 2? 7; exp.al. d 2? 6-9; set. o 
19, subim. 10, 9? 8 mm. 
Hab.—KEngland and Wales; Carinthia; Switzerland 
(Pict.); the South of Spain (Ramb.). July and August. 
In mountain torrents, and cold streams. 
M. Pictet’s description of B. obscura was probably 
drawn up from a dried specimen. 
Heptagenia guttata. 
Baetis guttata, Pict. 1843-5; Hphemera (Baetis) guttata, 
Blanch. 1851. 
Imago, s.s. ¢. Caput et thorax fusci, flavo varie- 
gati (‘‘ punctati,” Pict.). Alze vitreee, nervis atris ; area 
marginalis pallidissime fuscescens. Pedes flavescentes ; 
femora apicibus maculisque singulis in mediis, tibizeque 
apicibus, nigris. Abdomen flavum (in figura fuscum), 
apicibus segmentorum strigisque lateralibus ex his obli- 
que productis, atque seriebus strigarum longitudinalium 
supra subtusque duabus, atris. Sete flavescentes, junc- 
turis in vices late et anguste nigro annulatis.” (Pict. & 
Blanch.) 
Long. corp. 2 12, set. 18, exp. al. 29 mm. 
Hab.—Valdivia, Chili (Blanch.). 
The following is probably an indeterminable species of Heptagenia. 
Ephemera gemmata, Scop. 1768. 
Imago,s.s. 9. “HE. gemmata. Tubercula tria frontalia, diaphana, 
crystallina, nigra, punctulata [ocelli]. Corpusrufum. Ineisure abdomi- 
nis marginibus flavicantibus. Setz caudales unciales.”’ 
Long. 7:5.’ 
Hab.—Circa aqueductum Fodinarum Idrensium (Scop.). 
