llü Kenneth J. Morton. 



than 2°"^ and 4*^; P* closed by a very oblique nervule and there- 

 fore somewhat acute at base, S""^ angulate at base; 2°*^ and 4*'' 

 öub-equal in length, 2°*^ broader than 4*^; 2°*^ straigtly truncate, 

 4* truncate in a very slighlly oblique manner; 5'*^ longest of all, 

 closing nervule long very oblique, and therefore base very acute; 

 Upper branch of cubitus furcating slightly before. middle of dis- 

 coidal cell. Pale, subhyaline, faintly testaceous at apex; neura- 

 tion pale; pterostigma brownish. 



In the cf the 9*^ segment is much developed dorsally; 

 viewed from above its ouler margin is deeply excised, the 

 angles on either side acutely produced and shining black; in 

 the excision, the hairy tips of the intermediate appendages, and 

 Ihe bare notched apices of the inferior appendages are visible; 

 Ihe lower portion of the superior appendages appears at the 

 side of the produced angles of the segment in the shape of 

 obtuse hairy lobes. Viewed from the side, the O'** dorsal seg- 

 ment is semicircularly excised, the excision being occupied by 

 the large superior appendage, the external margin of which is 

 sinuous, the low^er margin nearly straight. Intermediate appen- 

 dages large approximate, flattened, subquadrate seen from side, 

 apices slightly thickened and hairy. Inferior appendages long, 

 slender, ascendent, viewed from beneath they are convergent, 

 but the apices diverge, are sub-acute and notched before the tip. 

 Penis large, a long apical portion divided into two blades flatte- 

 ned and slightly dilated at apex; sheaths vvith a large club-sha- 

 ped head, hairy, pectinate; there appears to be a projection on 

 the upper edge and the sheaths are therefore probably furcate 

 and Limnophileform. AU the appendages are shining blackish at 

 apex. V unknown. 



Lenglh of body, cf, 10 mm. Expanse 32 mm. 



Described from o ne of two males taken by Dr John Sahl- 

 berg at Mandojärvi end of lune 1894. I have to express my 

 gratitude to Dr Sahlberg for allowing me to describe the insect 

 and also for his kindness in adding it to my coUection. 



A very interesting species bearing resemblance to Stenophy- 

 lax {B/>odicolqjfu<! Wall.) alpe.stris Koi., but the connection is only 

 superficial. Mr MLachlan who has kindly examined the insect 

 points out that the 9*'' dorsal segment (not offen visible in Limno- 



