308 Dr. C. P. Alexander on 
Hab. New Zealand (South Island). 
Holotype, 8, Greymouth, sea-level, September 7, 1921 
(2. RR. Harsts),. 
Paratopotypes, 4 3 3, 1 teneral. 
Gnophomyia triton belongs to the same group as G. flavo- 
pygialis, Alex. (see discussion, Ann. & Mag. Nat. Hist. ser. 9, 
vol. 1x; p. 150, 1922): 
Atarba (Atarba) viridicolor, sp. n. 
General coloration yellowish green; antenne elongate; 
wings greenish yellow; Sc long; basal deflection of Cu, near 
mid-length of cell lst Ad. 
Female.—Length 7:5 mm.; wing 7:2 mm. 
Rostrum pale greenish yellow; palpi pale brown, the 
base greenish. Antenne elongate, if bent backward ex- 
tending about to the base of the third abdominal segment; 
scapal segments testaceous, tinged with green; basal flagellar 
segment testaceous; remaining flagellar segments black. 
Head pale greenish testaceous. 
Mesonotum pale fawn-yellow, tinted with green, especially 
near the wing-root. Pleura similar to the notum, but very 
deeply tinged with light green—this colour undoubtedly 
very intense in fresh specimens. Halteres with the stem 
green, the knobs paler. Legs with the coxze and trochanters _ 
light green; femora and tibiz brownish yellow, the former 
tinged with green near base; tarsi gradually darkening to 
brownish black. Wings pale greenish yellow subhyaline; 
stigma faintly indicated; veins brown, tinged with green, 
deepest along costa. Venation: Sc long, Sc, ending a short 
distanee before the fork of Rs, Sc, some distance from its tip, 
Sc, alone about two-thirds the basal deflection of Cu,; cell 
lst M, elongate-pentagonal, gently widened distally, the 
veins beyond it rather long and slender; basal deflection 
of Cu; at or just beyond mid-length of the caudal face of 
the cell. 
Abdomen pale brownish green, including the base of the 
ovipositor. Elongate tergal valves of the ovipositor straight, 
gently upeurved at their tips, green at base, passing into 
dark horn-colour. 
Hab. New Zealand (North Island). 
Holotype, 2, Ohakune, altitude 2060 feet, October 11, 
1921 (7. R. Harris). 
Paratopotype, 2 , October 23, 1921. 
