ALEXANDER, CR^NE FLIES FR. S. CHILE & TIERRA D. FUEGO. 11 



Mesonotal praescutum gray with three darker grayish 

 brown stripes, the median stripe broad; second an- 

 tennal segment orange; (male hypopygmm of the 

 known species with a deep U-shaped median notch; 

 of the females, with the sternal valves of the 

 ovipositor very much shorter than the tergal val- 

 ves). 



14 Posterior cells of the wing subhyahne, only the cen- 

 ters darkened. (Magallanes, Straits of Magellan.) 



T, magellanicola, sp. n. 



Posterior cells dark with only the apices marked 

 with påle areas. (Magallanes, Straits of Magellan.) 



T. magellanica, sp. n. 



The following species are omitted from the above key 

 because of insufficient description of details; T. pictipenms 

 Walk and T. variineura (Bm.). Both of these species (it 

 thev are not actually synonymous as suggested by the writer 

 some years ago (Annals Entomological Society of America 

 vol 5 p 344; 1912) belong to the group of species with 

 heavily marmorate wings and with the second antennal seg- 

 ment orange or fulvous. 



Tipula ona, sp. n. 



Antennae with the five basal segments yellowish; head 

 påle reddish brown with an indistinct capillary brown hne; 

 praescutum dull yellow, with three brown stripes; femora 

 yellow, before the tips with a narrow brown ring; wmgs 

 whitish subhyaline, streaked longitudinally with dark brown; 

 abdomen dull brownish yellow, indistinctly trivittate with 



brown. 



Female. — Length about 17 mm.; wing, 15,3 mm. 



Frontal prolongation of the head reddish brown, spar- 

 sely eray pruinose. Antennae with the basal five segments 

 dull yellow, the first segment sHghtly pollinose; intermediat^ 

 segments indistinctly bicolorous, the distal segments dark 

 brown Head påle reddish brown with an indistinct capil- 

 lary brown line that extends onto the low vertical tubercle. 



