8 Bergroth, On some Limnobiinae from Northern Europe. 



slightly infuscated, a little longer than half the length of 

 the petiole of cell R 2 , radial sector beginning apicad from 

 the middle of the wing, curved, rather short but somewhat 

 variable in length, cell R 2 and its petiole subequal in length, 

 R 2 and R 3 strongly divergent, cell R 3 distinctly longer than 

 R 4+5 , cross-vein m present, ascending portion of Cu! joining 

 middle of discal cell. Halteres pale greyish testaceous. Ab- 

 domen pilose, propygium short, not incrassated, but with 

 stout curved lateral pieces, apical appendages slender, terebra 

 rather long, moderately recurved. 



Male: antennae much longer than head and thorax 

 taken together but not reaching middle of abdomen, second 

 joint of scapus small, globular, much shorter than first 

 flagellar joint, flagellum with fusiform joints bearing two or 

 three verticillate hairs in the middle and besides thickly 

 clothed with a short erect pilosity, verticillate hairs much 

 shorter than the length of the joints; wings as long as the 

 body, Sc bifid at the apex, which is very little more basad 

 than the base of cell R 3 , Scj perpendicular, Sc 2 incurved, 

 radial cross-vein situated at the outer end of the stigma 

 and a little before the apex of R x with the straight upturned 

 end of which it forms an obtuse angle, perpendicular, 

 joining R 2 near its base, cell IV^ and its petiole subequal in 

 length, descending portion of Cu t gently curved; legs long, 

 hind femora passing apex of abdomen by one-fourth their 

 length. 



Female: antennae barely reaching base of wings, second 

 joint of scapus obovate, not shorter than first flagellar 

 joint, joints of flagellum subglobular, scarcely longer than 

 broad, without the short thick erect pubescence of the male 

 but with verticillate hairs which are longer than the joints; 

 wings much smaller than in the male, as long as the abdomen, 

 Sc and R x straight and simple at apex, radial cross-vein 

 wanting, cell Mj very much shorter than its peduncle, 

 descending portion of C^ straight (wings sometimes more 

 degenerate as seen in fig. 7); legs rather short, hind femora 

 reaching base of terebra. 



