TIPULIDJE. 33 



ANTOCHINI. 



1. Rostrum at least as long as the head, sometimes very long; no marginal 



cross-vein . . . 2 



Eostrum shorter than the head . . 4 



2. Wings without suhmarginal cell. .... TOXORRHINA Loew. 

 Wings with a submarginal cell. ....... 3 



3. Rostrum not much longer than the head. . RHAMPHIDIA Meigen. 

 Rostrum the length of the whole body. ELEPHANTOMYIA Osten Sacken. 



4. Discal cell open. . . . .^ 5 



Uiscal cell closed ... 6 



5. Second basal cell considerably shorter than the first, the great cross- 



vein more proximal than the origin of the second vein ; three 

 posterior cells. _ - _ . . ^ DIOTREPHA Osten Sacken. 



Second basal cell of about the same length as the first. 



ELLIPTERA Schiner. 



6. No marginal cross-vein whatever. . . . ATARBA Osten Sacken. 

 Marginal cross-vein present 7 



7. First longitudinal vein ends in the costa nearly opposite the inner end 



of the submarginal cell . . . 8 



The first vein ends in the costa far beyond the inner end of the submar- 

 ginal cell. .... DICRANOPTYCHA Osten Sacken. 



8. Submarginal cell as long or but little longer than the first posterior cell. 



TEUCHOLABIS Osten Sacken. 

 Submarginal cell much longer than the first posterior cell. 



ANTOCHA Osten Sacken. 



ERIOPTERINI. 



1. Five posterior cells. . . . . CLADDRA Osten Sacken. 

 Four posterior cells. 2 



2. The inner marginal cell has almost the shape of an equilateral triangle. 



CRYPTOLABIS Osten Sacken. 

 Inner marginal cell of the usual shape. ...... 3 



3. Wings conspicuously hairy on the whole surface or along the veins. 4 

 Wings not conspicuously hairy, veins bare or nearly so.* . . 6 



4. Wings hairy on the whole surface. . RHYPHOLOPHUS Kolenati. 

 Wings hairy along the veins only. 5 



* Antenna! joints subreniform and nodose; the eyes nearly contiguous 

 above and below (Central America). . SIGMATOMERA Osten Sacken. 



