ALEXANDER, CRANE FLIES FR. S. CHILE & TIERRA D. FUEGO. 29 



largement of the segments a shade darker than the remain- 

 der of the segments, producing a very indistinct bicolorous 

 effect. Head brownish grav, the vertex with a narrow dark 

 brovvn median line. 



Mesonotal praescutum påle buffy brown, with three 

 darker stripes, the median stripe brown, of a shade that is 

 but little darker than the ground-colour, margined laterally 

 with dark brown, this margin becoming obsolete anteriorly; 

 lateral stripes dark brown; scutum duU gray, the lobes in- 

 distinctly marked with brown; scutellum and postnotum 

 reddish brown, the latter with a very indistinct capillary 

 brown line. Pleura påle testaceous brown. Halteres påle, 

 yellow at the base, the knobs darker brown. Legs with the 

 coxae påle testaceous brown ; trochanters dull yellow; femora 

 dull brownish yellow with a broad dark brown ring imme- 

 diately before the tips; tibiae and tarsi brown. Wings with 

 a very påle brownish gray suf fusion, sparsely variegated with 

 subhyaline; the outer half of cell Se is dark brown, excepting 

 a small circular, hyaline area before the tip; a subhyaline 

 area beyond the stigma in the outer half of cell 2nd Bi and 

 the basal half of cell E2; outer half of cell R5 påle; caudal 

 half of cell 1st M2 påle; indistinct påle areas in cell 1st Ri 

 near the origin of Rs\ before the end of cell M\ in cell Cu 

 and a zigzag line in cell 1st A. Venation: petiole of cell 

 Ml short, about as long as m. 



Abdomen dull yellow, with narrow sublateral dark brown 

 stripes, the dorso-median stripe very indistinct; abdomen 

 scarsely darkened toward the tip; sternites dull yellow, the 

 terminal segments more obscure. Male hypopygium with 

 the ninth tergite (plate 1, fig. 4) extensive, produced caudad 

 into two long, slender blackened points that are directed 

 caudad and slightly ventrad, the space between them almost 

 transversely truncate; lateral angles of the tergite produced 

 caudad and proximad into somewhat similar arms. Outer 

 pleural appendage elongate-cylindrical with long, divergent 

 brown setae; appendage on eighth pleurite rather slender, 

 provided with long, dark brown hairs. The påle lobes on 

 the ninth sternite with the apex deeply notched on the 

 lateral face, the tip without a conspicuous pencil of setae. 

 Eighth sternite (plate 1, fig. 8) with the appendage påle 

 yellow, profoundly trifid, the median lobe considerably longer 



