ALEXANDER, CRANE FLIES FR. S. CHILE & TIERRA D. FUEGO. 9 



3. All, or practically all, of cell i?ö påle. 4. 



At least the base or middle portion of cell B5 con- 

 spicuously darkened {glaphyroptera group 1; eighth 

 sternite of male hypopygium with a long, conspiciious 

 appendage that is profoundly bifid or trifid). 7. 



4. Posterior cells {Mx to Cui) uniformly darkened. 

 (Tierra del Fuego). T. rufirostris Big. 



Posterior cells (Mj to Cui) påle basally. 5. 



5. Mesonotal praescutum dark brown with three gray 

 stripes. 6. 



Mesonotal praescutum dull yellowish with three brown 

 stripes. (Tierra del Fuego.) T. ona, sp. n. 



6. Wing-markings with the brown markings more exten- 

 sive, the white spöt beyond the stigma narrowly tri- 

 angulär; anal and posterior cells almost uniformly 

 darkened on their outher half. (Southern Chile.) 



T. chilensis, sp. n. 



Wing-markings with the brown pattern less exten- 

 sive, the white spöt beyond the stigma broad; anal 

 and posterior cells variegated with brown and sub- 

 hyaline on their outer half. (Santa Cruz, Southern 

 Patagonia.) T. philippiana Alex. 



7. A broad, conspicuous, transverse white band beyond 

 the stigma, extending from costa to beyond cell 

 1st Mz into the base of cell J/^, crossing the base of 

 cell R5\ (male hypopygium with the appendage of 

 the eighth sternite bifid). (Southern Chile.) 



T. duséni, sp. n. 



No such conspicuous band beyond the stigma. 8. 



8. gubcostal cell with the outer half dark brown, ex- 

 cepting a small oval, subhyaline spöt just before the 

 end of the cell; (scapal segments dull yellow; hypo- 

 pygium with the appendage of the eighth sternite 

 trifid, the median lobe longer than the subacute la- 

 teral lobes). (Magallanes, Straits of Magellan.) 



T, nordenskjöldif sp. n. 



Subcostal cell with two or three small brown marks. 9. 



