on Dr. C. p. Alexander on 



witli the pleura; trocliaiitcrs fi;rccn ; fcmoi-a obscure yellow, 

 the bases and ti[)s narrowly tinged with green; tibiie 

 and tarsi pale brown. AVings with a pale greyish tinge, 

 cells C and Sc dark brown, the former a little paler; 

 stigmal area large, pale cream-yellow; wing-base indistinctly 

 pale; veins slender, dark brown. Venation : Sco ending 

 al)out opposite raid-length of lis, the latter straight, about 

 two-thirds /?2+3 5 ^ faint, with one maerotriehia near mid- 

 length ; distal section of Ro pale but evident, nearly as long 

 as m I petiole of cell Mj a little longer than m ; inner end 

 of cell Ist M.J pointed; cell 2nd A very long and narrow, 

 parallel-sided. 



Abdomen pale greenish brown, the eighth sternite indis- 

 tinctly darker ; hypopygium obscure greenish. M.ile hypo- 

 pyirium with the ninth tergite having a broad, U-shaped, 

 median notch, the short lobes obtusely rounded. Region of 

 the ninth pleurite not produced beyond the level of the end 

 of the tergite as in M. albistiyina, Edwards. 



Hab. New Zealand (South Island). 



Holotype, (^ , White Hock, Mt. Thomas, Canterbury, 

 altitude 1000 feet, December 18, 1921 (J. W. Campbell and 

 Stuart Lindsay). 



Paratopotype, ^ . 



Maa-omastix pa/lidistigma is by far the smallest species of 

 the viridis group so far described. The second cell is very 

 narrow for a member of this group. 



Macromastix grey ana, sp. n. 



Male. — Length 11-12 mm. ; wing 17-17'2 mm. 



Related to M. alexanderi, Edwards, from which it differs 

 as follows : — 



Size a little larger. Frontal prolongation of head elongate, 

 the nasus long and conspicuous. Head pale buff Mith a 

 relatively small dark brown spot in the centre of the vertex. 

 Thorax clear light grey, the prsescutum with four con- 

 spicuous dark brown sti'ipes, the intermediate pair narrowly 

 separated by a capillary line ; lateral margins of praescutum 

 not darkened ; each scutal lobe with a conspicuous dark 

 brown area ; median area of scutum, the scutellum,and post- 

 notum jjale testaceous, the caudal margin of the latter a 

 little darkened. Pleura clear light grey. Wings relatively 

 narrow, the pattern much darker brown ; cells M^ and 

 27id M2 clear except the extreme bases which are abruptly 

 dark ; basal half of cell M-^ clear, the apex with a dusky 

 triangle ; no conspicuous brown blotch in cell M on vein (.'u 



