LIMNOBIA. 8T 



(such are the European L. flavipes Meig., nubeculosa M., sylvi- 

 cola Schurn., nigropunctata Schum. etc.). 



The name Limnobia (from a*/^, lake, swamp, and jStdu, I live), 

 as originally introduced by Meigen (1818), embraced all the 

 brevipalpous Tipulidse, with the exclusion of Erioptera, Aniso- 

 mera, Trichocera, and Rhipidia. Macquart afterwards confined 

 it to the species with four posterior cells. The genus, in its 

 present limitation, dates from the time of the separation of Dicra- 

 nomyia by Stephens in 1829 ; it has continued, however, in the 

 principal works published since (especially those of Zetterstedt 

 and Walker), to be received in Meigen's wide acceptation. My 

 definition of Limnobia, in 1859, was coincident with the whole 

 section Limnobina ; Rhipidia, Geranomyia, Dicranomyia, and 

 Limnobia, in the narrowest sense, were treated as subgenera. 



Table for determining the species, 

 c The marginal cross-vein is at the tip of the first longitudinal vein. 1 2 



1 < The marginal cross-vein is some distance back of the tip of the first 

 " longitudinal vein. 6 

 / Femora with one or more brown bands before the tip. 3 



2 < Femora without brown bands, brown at the tip only. 



( 5 triocellata 0. S. 



o f Knob of the halteres pale at the tip. 4 



( Knob of the halteres altogether infuscated. 5 



Femora with two brown bands and a pale band between them ; a ring- 

 like spot at the end of the first longitudinal vein. 



1 cinctipes Say. 



Femora with three brown bands and two pale ones between them ; the 



brown spot at the tip of the first longitudinal vein is entire, not 



ring-like. 2 immatura 0. S. 



r A series of more or less numerous (from two to eight) brown dots 



I along the first basal cell. 3 solitaria 0. S. 



j Four large, dark, almost equidistant brown spots in the first basal 



cell. 4 hudsonica 0. S. 



/ Wings clouded with brown. 7 



6 J Wings immaculate (or with a few small brown dots near the anterior 



' margin only). 8 



w ( Posterior cells clouded in the middle. 6 parietina 0. S. 



\ Posterior cells not clouded in the middle. 7 indigena 0. S, 



1 Whenever the structure occurs that the first longitudinal vein is in- 

 curved towards the second, whereas the cross-vein seems to be placed 

 between it and the costa, the cross-vein is to be considered as being at the 

 tip of the first longitudinal vein. 



<H 



