303 Dr. 0. P. Alexamlcr on 



Hah. New Zealand (Soutli Tslaiul). 



Jlolotifpe, (^ , Greyiuoutli, sea-level, September 7,1921 

 (T. R. Harris). 



Paratoputypes, 4< (J c? , 1 teneral. 



Gnophomyia triton belongs to the same group as G. ftavo- 

 pyfjialis, Alex, (see discussioUj Anu. & Mag. Nat. Hist. ser. 9, 

 vol. ix. p. 150, 1922). 



Atarba (Atarba) viridicolor, sp. n. 



General coloration yellowish green; antennre elongate; 

 wings greenish yellow; Sc long; basal deflection of Cu^ near 

 luid-lengtli of cell \st J/o- 



Female. — Length 7*5 mm.; wing 7*2 mm. 



Rostrum pale greenish yellow; palpi pale brown, the 

 base greenish. Antennae elongate, if bent backward ex- 

 tendino; 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. 



Mcsouotum 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 coxre and trochanters 

 light green; femora and tibiae 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 

 distance before the fork of Jis, Sc.2 some distance from its tip, 

 Sci alone about two-thirds the basal deflection of Cm^; cell 

 1*^ Mo elongate-pentagonal, gently widened distally, the 

 veins beyond it rather long and slender; basal deflection 

 of Cui 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 upcurved at their tips, green at base, passing into 

 dark horn-colour. 



Hub. New Zealand (North Island). 



Uolvtype, ? , Ohakune, altitude 2060 feet, October 11, 

 1921 [f. R. Harris). 



Paratopotype, ? , October 23, 1921. 



