FAMILY TIPULID.E THE CRANE FLIES 43 



26. Tibial spurs present. (Hexatomini) '. . . 51 



Tibial spurs lacking. (Eriopterini) 78 



LIMONIINI: SUBTRIBES, GENERA, SUBGENERA 



27. Wings with vein R2 lacking (25) 28 



Wings with vein Ra present (24, 26, 29) 29 



28. Rostrum short and inconspicuous; Rs long and straight, running close 



to R, and in alignment with Rlvs) r-m distinct. (Ellipteraria). 



Elliptera Schiner 

 Rosti'um of moderate length, about equal in length to remainder of 

 head; Rs short, gently arcuated, not in alignment with R-..-3; r-m 

 often shortened or obliterated by approximation of adjoining veins 

 (25). (Heliaria) Helius St. Fargeau 



29. Wings with m-cu more than three, (and usually much more), times 



its own length before the fork of M (26). (Orimargar"a, Orimarga) 30 

 Wings with m-cu close to or beyond the fork of M, if before, the 

 distance not or scarcely exceeding the length of the vein itself 

 (24, 27, 29 ) '. 31 



30. Wings with three branches of Media reaching margin, cell M3 being 



present; m-cu beneath Rs Orimarga: Orimarga Osten Sacken 



Wings with two branches of Media reaching margin, cell M3 lacking; 

 m-cu far before origin of Rs (26). .Orimarga: Diotrepha Osten Sacken 



31. Wings with vein R2 lying far distad, beyond level of outer end of 



cell 1st M::; m-cu beyond fork of M (27) (Dicranoptycharia). 



Dicranoptycha Osten Sacken 

 Wings with vein R2 in almost transverse alignment with r-m and basal 

 half of cell 1st M^; m-cu at or slig-htly before fork of M (24, 

 28, 29) 32 



32. Wings with Rs long and straight (24, 28); antennae IG-segmented. . . 33 



Wings with Rs shorter and more arcuated (21); antennae 14- 

 segmented. (Limoniaria, Limonia) 34 



33. Anal angle of wing very prominent, almost square; Rs long, diverg- 



ing at an acute angle from R,, ending approximately between the 

 branches of Rs or in alignment with R4.5 (28) (Antocharia). 



Antocha Osten Sacken 

 Anal angle of wing normally rounded; Rs long, lying very close to 

 Ri and nearly parallel to it, its end in alignment with R2+3; basal 

 section of R-.^., short and arcuated, diverging from the end of Rs 

 at nearly a right angle (24) (Ellipteraria) Elliptera Schiner 



34. Wings with M and both sections of M3 lacking, cell Ms thus entirely 



obliterated Limonia : Alexandriaria Garrett 



Wings with at least the distal section of M3 preserved and usually 

 with both sections, together with m, cell M3 thus usually present 

 (29) 35 



35. Supernumerary crossveins present in certain cells of wing 36 



No supernumerary crossveins in cells of wing (excepting a weak 



element sometimes evident in cell Sc) (29) 37 



