FAMILY TIPULID.E — THE CRANE FLIES 47 



62. Wing-s with vein R- lacking; m-cu at outer end of cell 1st M^; western. 



Phyllolabis Osten Sacken 

 Wings with vein R.. present; m-cu at or before two-thirds the leng-th 

 of cell 1st M;, when the latter is present (35, 36) 63 



63. Wings with cell 1st M2 open by atrophy of m (3.j); male with 



elongate nodulose antennae; tropical and subtropical. 



Polymera: Polymera Wiedemann 

 Wings with cell 1st M- closed; antennae of male not nodulose 64 



64. Wings with Sc very long, Sc, R1+2 and R3 all ending close together 



at costal margin; tropical Psaronius Enderleiii 



Wings with Sc short, widely separated from either Ri+; or R3 (36) . . . 65 



65. Wings with m-cu at or close to fork of M; anterior arculus lacking. 



(Dactylolabaria) Dactylolabis Osten Sacken 



Wings with m-cu beyond the fork of M, at from one-third to about 

 one-half the length of cell 1st M^; where close to fork of M (some 

 Pseudolimnophila) the arculus complete 66 



66. Wings with the anterior arculus lacking (36) (Pseudolimnophilaria, 



in part) 67 



Wings with the anterior arculus present 6S 



67. Cell 1st M2 of wings very large, its inner end lying far proximad of 



the other elements of the cord (36) Prolimnophila Alexander 



Cell 1st M; of wings of normal size, its inner end straight and in ap- 

 proximate alignment with the elements of the anterior cord. 



Archilimnophila, g. n. 



68. Wings with Sc relatively short, Sci ending before the level of the fork 



of Rs; where slightly longer (Limnophila albipes Leonard) the pos- 

 terior tarsi snowy-white. (Limnophilaria, in part) 69 



Wings with Sc longei", Sc: ending opposite or beyond the fork of Rs; 

 (compare some species of Pilaria, distinguished by having the an- 

 tennal verticils of unusual length) 70 



69. Antennae with long conspicuous verticils; tuberculate pits present, 



small, placed at extreme cephalic end of prsescutum; Rs elongate, 



exceeding vein R3; cell Mi present or lacking Pilaria Sintenis 



Antennge with short verticils; tuberculate pits lacking; Rs short and 

 strongly arcuated or angulated at origin; cell M, lacking. 



Shannonomyia Alexander 



70. Head strongly narrowed and prolonged behind; radial and medial 



veins beyond cord long and sinuous; vein R3 extending generally 

 parallel to vein R4, not diverging markedly at tips; vein 2nd A 

 strongly curved to margin (Pseudolinmnophilaria, in part). 



Pseudolimnophila Alexander 

 Head broad, not conspicuously narrowed behind; radial and medial 

 veins beyond cord more nearly straight; vein R3 diverging strongly 

 from vein R4, cell R3 conspicuously widened at margin; vein 2nd A 

 not curved strongly into margin (Limnophilaria, in part, Limno- 

 phila). 



71. Supernumerary crossveins in either cell R3 or cell M of wing 72 



No supeimumerary crossveins in cells of wing 74 



