10 
ESBEN-PETEKSEN. 
Antennae yellowish white, long and slender. Legs yellowisli white and not densely 
haired. Setae of equal length, yellowish and with indistinct annulations at the joinings; the 
two uttermost hairy on their innerside, the middle one ou both sides. Hair dark. Hind 
angles of 5 th to 9th seg¬ 
ments produced into short, 
broad and spiny teeth. 7 pairs 
of single trachéal gills on each 
of the Ist to 7th segments. 
Length 10 mm.; setae 
5 mm. 
The characteristic shape 
of the mouthparts indicates 
that the genus must be placed 
near the Ameletus. 
2 specimens are in the 
collection. 5. VII. 09 JV« 33, 
near mount Minisej. 
Fig. 13. Sparrea norvegica E.-Peters. Nymph. a left maxilla, 
b left mandible. 
Fig. 14. Sparrea norvegica E.-Peters. Nympb. 
a Labium, b Labrum. 
Fig. 15. Sparrea norvegica E.-Peters. Nymph. 
a 4th trachéal gill, b Hind leg. 
Siphlurus aestivalis Etn. 
Eaton, Ent. Monthl. Mag. London 1903. 
Styhlurus spinosus Bengtsson, Paläarktischeu Ephemcriden, Lund. 1909. 
