30 Transaciions. — Zoology. 



metanotum yellow, with two black spots near the posterior 

 margin. Abdomen with black lateral stripes, which meet, 

 both above and below, on the penultimate segment, so that 

 the two last segments are altogether black. Forceps of the 

 male thickened, hidden. Legs slender, black, the coxae yel- 

 lowish-orange. Wings hyaline, the costal cell clear ; stigma 

 brown ; the lower edge of the posterior basal cell with small 

 folds. Length, ^9mm.; wing, <? 12-13 mm. Female mi- 

 known. 



Hab. Wellington (Hudson). 



Genus Maceomastix, Osten-Sacken (1886). 



Rostrum rather long, with a distinct nasus. Last joint of 

 the palpi about as long as the other three taken together. 

 Front with a tubercle above the antennae. Antennae of male 

 13-jointed, often much longer than the body, sometimes short; 

 first joint thickened, the second short, the others almost fili- 

 form ; the joints gradually increasing in length. Antennae of 

 female 13-jointed, not longer than the head. Abdomen rather 

 stout and short ; the last segment in the male narrower than 

 the others ; the forceps small and not protruding. Ovipositor 

 not protruding. Tibiae with spurs ; empodia present. Vena- 

 tion of the wings as in Tijnda. 



This genus is the same as Macrothorax oi Jaennicke (1867), 

 a name which had been preoccupied in 1864. 



Key to the Species. 

 Wings unspotted. 



Wings colourless. 



Thorax cinerous, very hairy . . 

 Thorax yellowish, glabrous 

 Wings tinted. 



Thorax cinerous, not very hairy 

 Thorax black, with yellow hairs 

 Wings spotted. 



Pale marks in basal cells connected 

 Pale marks in basal cells separated 



M. vulpina. 

 M. pallida. 



M. fucata. 

 M. montana. 



M. lunata. 

 M. binotata. 



Macromastix vulpina. 



Megistocera vulpina, Hutton, Cat. Diptera of N.Z., p. 16 



(1881). Macromastix vulpina, Osten-Sacken, " Studies on 



Tipulidse," part i., p. 185. 



This species is easily distinguished by the long yellowish- 

 white hairs on the chest. The prsefurca occupies about one- 

 third of the whole of the second longitudinal vein. The 

 auxiliary vein is blended with the first longitudinal. The 

 hind margin of the posterior basal cell has a series of small 

 cross-folds. Length, S, $ 9-10 mm. ; of the wing, <? , ? 

 15 mm.; of the antennae, J 19-20 mm., $ 3 mm. 



Hah. Otago (F. W. H). 



