FAMILY TIPULID.E THE CRANE FLIES 49 



81. Wings with R2+3t4 subequal to or longer than vein Ri, cell R3 thus 



being subequal to its petiole; vein R; at or before the fork of Riit4. 



Neolimnophila Alexander 

 Wings with R-..+3+4 shorter than vein R3, cell R3 being much longer 

 than its petiole; R; far beyond fork of R2+3t4 82 



82. Wings with cell Mi very small, about one-third its petiole; fusion- 



segment of antenna very long, about equal to the succeeding four 



segments combined; western Pterochionea Alexander 



Wings with cell M, subequal to or longer than its petiole; fusion- 

 segment of antennae shorter, about as long as the succeeding two 

 or three segments combined. (Cladura) 83 



83. Wings with Rit- elongate, exceeding R2+3+4; R2+3 subequal to m-cu; 



male hypopygium with two dististyles. .Cladura: Neocladura Alexander 

 Wings with R,+; shorter than R2+3+4; R2+3 approximately twice m-cu; 

 male hypopygium with a single powerful dististyle. 



Cladura: Cladura Osten Sacken 



84. Rostrum very long and slender, approximately one-half the entire 



body or longer; setae of legs profoundly bifid (Toxorhinaria, 



Toxorhina ) 85 



Rostrum short, not exceeding remainder of head; setas of legs simple. 86 



85. Wings with Rs having a single branch (37); eastern and tropical. 



Toxorhina: Toxorhina Osten Sacken 

 Wings with Rs having two branches; tropical. 



Toxorhina: Ceratocheilus Wescht§ 



86. Two branches of Rs reach the wing-margin (38) 87 



Three branches of Rs reach the wing-margin (39-44) 89 



87. Wings with Ri ending before midlength; anterior branch of Rs 



diverging strongly from posterior branch, arising at or close to r-m, 

 straight and oblique; tropical. (Styringomyaria) . .Styringomyia Lcew 

 Wings with Ri ending about opposite two-thirds their length; branches 

 of Rs subparallel on basal half. (Gonomyaria) 88 



88. Wings with R,. present, close to fork of Rs; Sc usually long, Sc, 



ending beyond origin of Rs (38); some eastern, jjut chiefly 



tropical Teucholabis: Teucholabis Osten Sacken 



Wings with R- lacking; Sc short, Sc, ending opposite or before origin 

 of Rs; chiefly tropical (Gonomyaria). . .Gonomyia: Lipophleps Bergroth 



89. Wings with R,, fused with Mi+; to form the entire cephalic face of 



cell 1st M2, r-m thus obliterated; only two branches of M reach the 

 margin; vein 2nd A very short (39); tropical. (Trentepohliaria). 



Trentepohlia: Paramongoma Brunetti 

 Wings with R,-, entirely distinct from M1+2, being separated by the 

 r-m crossvein (the veins fused only in a few species of Paratro- 

 pesa, where the alternative characters hold); three branches of M 

 reach the mai'gin; vein 2nd A of normal length (40-11) 90 



90. Wings with cell R3 short, vein R3 shorter than the petiole of cell R3 



(40) 91 



Wings with cell R3 deep, vein Rj longer than the petiole of cell R3 

 (42-44); shortest in Progonomyia and Empedomorpha 99 



