150 Dr. C. P. Alexander on 
Gnophomyia flavopygialis, sp. n. 
Size small (wing under 8 mm.) ; general coloration red- 
dish brown, the prescutum and scutum marked with darker — 
brown; femora and tibiz yellow, tipped with dark brown ; 
wings faintly yellowish, stigma small, dark brown ; mostly 
lying distad of 7; hypopygium yellowish; pleural appen- 
dages tapering to a single apical spine. 
Male.—Length 4°5-5°5 mm. ; wing 6°3-7°8 mm. 
Female.—Length 5:°5-5°8 mm.; wing 5'9-7 mm. 
Rostrum reddish; palpi dark brown. Antenne dark 
brown, the basal segments a little more reddish ; flagellar 
segments oval-cylindrical. Head grey. 
Mesonotum light reddish brown. The preescutum with 
three darker brown stripes ; median stripe broad, becoming 
obliterated before the suture, very indistinctly split by a 
capillary darker line ; lateral stripes less distinct, better de- 
limited internally ; scutal lobes dark brown; scutellum dark 
brown ; postnotum reddish anteriorly, passing into brown 
behind. Pleura reddish brown; an interrupted dorsal 
brown longitudinal stripe extending to the halteres ; meso- 
sternum dark medially and as a narrow line cephalad of the 
mesocoxa. Halteres yellow. Legs with the coxe and tro- 
chanters reddish brown; femora and tibiz obscure yellow, 
the tips narrowly dark brown; tarsi dark brown. Wings 
with a faint yellow tinge, the costal cell faintly infuscated, 
especially basally; stigma small, dark brown, almost all 
lying distad of r; veins dark brown. Venation: Sc, at the 
extreme tip of Sc,,so Sc, alone is about equal to r-m; r just 
before the fork of M. 
Abdomen dark brown; hypopygium reddish yellow, this 
coloration including the pleurites and appendages. Male 
hypopygium with the pleurites stout, tapering to the apex ; 
the single pleural appendage is situated at the apex of the 
pleurite, slender, tapering to the single acute apical spine; 
before the tip on the cephalic face with a small weakly seti- 
gerous lobule; no brush of sete at base of caudal-lateral 
angle of appendage. 
The paratypes are smaller than the type with Sc, a little 
longer and the stigmal spot fainter, but the coloration and 
structure of the male hypopygium is quite the same. 
Hab. New Zealand (South Island). 
Holotype, &, Blackball, West Coast, March 1920 (J. W. 
Campbell). 
Allotype, 2, Nelson, January 1, 1920 (A. Philpott). 
