NO. 1900. sYSoi'islii OF \i:uruorii\\h ijm.\ ohis.e-alex.wueh. 491 

 CHARACTERIZATIONS OF NEW SPECIES AND KEYS TO THE FORMS. 



KEY TO THE SUBK.\MILIES OF TIPCLID.E. 



1 Termiual segment of the miixillary pulpi very long, whip-lash shaped, much 

 lojigor than all of the preceding Begments combined; Sc ends in R, Sci being 

 obliterated; fusion of Cu, on M usually slight, often punctiform; cell Cu,of 

 the wings usually broader at the base than at the middle. Antenna; 13-ses:- 



mented Tipulinve. 



Terminal segment of the maxillary palpi short, scarcely longer than the two pre- 

 ceding combined; Sc ends in C, Sc, being present; fusion of Cu, on M usual 

 long; cell Cu, of the wings usually only as broad at the base as at the middle. 



Antenna 14 or 16 segmented LimnobiKvE. 



The exceptions to the above characterizations are numerous, but 



tlie majority should liold. Pedicia. a Limuobiue, has lon<; uuixilhuy 



palpi like the longipalpous Tipulinie; the Dicrauott« (Pedicini) have 



13-segmented antennae, etc. 



KEY TO THE TRIBES OP LIMNOBIN.«. 



1 . R, with two branches reaching the margin 2. 



R, with three branches reaching the margin 4. 



2. Antenna' i4-segmented l-niNOBiNi. 



Antenna; 16-segmented 3. 



3. R, usually incurved toward K.,+.^ at the Aving margin and fused backward with it; 



tibia; with spurs at the tip Cvlindrotomini. 



R, nms straight to the wing margin, not fusing Nvith R^+s', tibiae spurless. 



Antochini. 



4. Tibiie spurred at the tip 5. 



Tibi;i; without spurs at the tip Ekiopterini. 



5. Antenna; with from 6 to 10 segments Hexatomini. 



Antenna; with from 13 to 39 segments 6. 



I .Sca retracted far toward the base of the wing so that it is proximad of the origin 



of R, Pedicini. 



SCj at the tip of Sc, or retracted backward ( Trichocera), not proximad of the origin 



of R, LiMNOPHIUNI. 



The tribes hereiii considered, Eriopterini and Limnophilini, are 

 exceedingly closely alhcd to one another, and the character of the 

 tibial spurs can not, apparently, be depended upon m critical cases. 

 'Me members of these tribes require further study at the hands of 



■ne student who has access to collections where a majority of the 

 lorms are contained. If these tribes are vahd (and no one disputes 

 tlie pomt as to whether they arc convenient to use or not), tJicii 

 otJier characters will be found to separate them. I have included 

 tlie genus Lecteria in both tribes, as L. obscura has spurred tibiaa 

 whereas L. armiUaris has naked, spurless tibiae. 



