НРНЕЫЕГіША. 
7 
rings and with dark brown apex; ail the tibiae with a dark brown ring at the tip and a 
paler one in the middle. Forceps yellow brown. Wings hyaline; longitudinal veins slightly 
darker than the menbrane. Costa, subcosta and radius with a yellowish tinge. Pterostig- 
matic région with yellowish tinge, branched and and anastomosed cross veinlets. 
Length 11 ram.; fore wing 11,5 mm; setae 23 mm. 
One specimen S, captured 17. VII. 1909 at the Kara river. 
Easily recognized by its pale abdomen, dark ringed femora and tibiæ and by its 
hyaline wings. 
Genus Heptagenia Walsh. 
Heptagenla bipunctata sp. nov. 
9 . Imago (dried). Head pale yellow. Eyes greyish blue and with a short purple streak 
before thcir fore margin. Prothorax above pale yellow with two purple red longitudinal 
Fig. 8 . Heptagenia bipunctata sp. nov. Logs of 9 . 
bauds, whicli are broadest 
behind. Meso- and metathorax 
above pale yellow with a faint 
purple red spot in front and 
with smaller spots of the same 
colour between the wings. 
Abdomen above rich 
yellow and with a purple red 
longitudinal band, being uar- 
rower on the 8 th segment and 
indistinct on the 9 th and 
Fig. 9. Heptagenia bipunctata sp. nov. Fore wing of 9 . 
1 0 th. On the dorsum of eacli segment at the side margins is a purple subtriangular spot, 
being prolonged and pointed in front, while at the liind margin it is so broad, that it 
touches the longitudinal middle band. But tliis is only the case with the spots on the Ist to 
