FAMILY TIPULID.E THE CRANE FLEES 51 



102. Wings with Sc? close to tip of Sc„ the two veins thus being subequal 



in length or nearly so. (Gonomyaria) Gnophomyia Osten Sacken 



"Wings with Sc2 far removed from tip of Sc, the latter vein long, sub- 

 equal in length to Rs; temperate. (Eriopteraria) . . . .Ormosia Rondani 



103. Wings with Rs ending in cell Rs, there being no element R2+3+4 (41) 



(Eriopteraria) Molophilus Curtis 



Wings with Rs ending in cell Rt, cell R3 being petiolate by a distinct 

 element R=.3.4 (42-44) 104 



104. Wings with a supernumerary crossvein in cell R3; vein 2nd A strongly 



bisinuate (42). (Eriopteraria) Helobia St. Fargeau 



Wings without a supernumerary crossvein in cell R3; vein 2nd A 

 straight or simply sinuous (43, 44) 105 



105. Wings with veins R3 and R4 divergent, unequal in length, R3 being 



less than two-thirds R^, cell R3 at margin much more extensive than 



cell R. IOC 



Wings with veins R3 and R4 nearly equal in length, or with R3 ex- 

 ceeding three-fourths of the length of R4, the veins extending gener- 

 ally parallel to one another to the margin; cell Rj at margin wider 

 than cell R3 107 



106. Wings with veins R3 and R, very unequal in length, widely divergent 



or sprawly, R3 being only about one-fourth R4 and ending in costa 

 close to vein R1+2; cell R3 at margin some eight times as wide as 



cell R-; tropical Neognophomyia Alexander 



Wings with veins R3 and R4 less conspicuously unequal, R3 being 

 about one-half R,; cell Rs at margin some three or four times as 

 wide as cell R-; tropical and subtropical. (Gonomyia). 



Gonomyia: Progonomyia Alexander 



107. Antennte of both sexes with the flagellar segments more or less kid- 



ney-shaped to give a nodulose appearance to the organ; large 

 species (wing, 15 mm. or more); tropical. (Sigmatomeraria). 



Sigmatomera Osten Sacken 

 Antennae of both sexes simple or nearly so, not nodulose; smaller 

 (wing less than 12 mm., usually less than 10 mm.) 108 



108. Cox« of middle and hind legs only slightly separated by the small 



meral region; wings with Sci relatively short, not exceeding one- 

 third the length of Rs 109 



Coxae of middle and hind legs widely separated by a large "pot- 

 bellied" meral region; wings with Sci very long, exceeding one-half 

 the length of Rs. (Eriopteraria) 110 



109. Wings with Rs in alignment with R2+3+4; Sc short, Sc, ending opposite 



the fork of Rs and far before R-..; Sci and Sc2 subequal; male hypo- 

 pygium with interbasal structures conspicuously developed as 



blackened spines; temperate Lipsothrix Loew 



Wings with Rs in approximate alignment with R.,; Sc long, Sc, ending 

 opposite or shortly before R:, at or beyond midlength of R1.+S+4; 

 Sc, much longer than Sc: (43); male hypopygium without evident 

 interbases Gnophomyia Osten Sacken 



110. Wings with R^ far before fork of R2+3+4, at or just beyond the fork of 



Rs; male with a very large hairy stigmal region that more or less 

 distorts the adjoining veins; western plains.. Empedomorpha Alexander 

 Wings with R- beyond the fork of R2+3+4; stigma nonnal Ill 



