70 Transactions. — Zoology. 



Sixth longitudinal vein not prolonged to the margin of the 

 wing " (Meade). 



In the New Zealand species the eyes are approximated in 

 the male ; the arista is distinctly pubescent, and the sixth 

 longitudinal vein is short, reaching about halfway from the 

 basal cell to the border of the wing ; the third and fourth 

 longitudinal veins diverge slightly outside the chief cross- vein. 



Key to the Species. 



Wings spotted . . . . . . . . T. maculipennis. 



Wings unspotted. 



Third joint of the antennae less than twice the 

 length of the second. 

 Face yellowish . . . . . . T. doloms. 



Face white. 



Length, 8 mm. to 9 mm. .. .. T.melas. 



Length, 5 mm. .. .. .. T.limpidus. 



Face black . . . . . . . . T. carbonarius. 



Third joint of antf nnse more than three times the 



length of the second . . . . T. ordmatus. 



Trichophthicus melas. 



Aricia melas, Schiner, Reise der " Novara," Dipt., p. 302 

 (1868) ; Hutton, Cat. Dipt. N.Z., p. 63. 



Frontal band dark, face silvery. Thorax dark-grey, with 

 three indistinct black bands. Abdomen dark-grey, the middle 

 segments with a pair of triangular black marks separated by 

 a pale band, which has a thin black line down the centre. 

 Legs piceous, knees tawny. Wings brownish, darker an- 

 teriorly and at the base ; squama? brownish. Length, 

 8-9 mm. ; wing, 7-8 mm. 



Hab. Throughout New Zealand. 



The facial ridges are not ciliated, but the fronto-orbital 

 bristles extend halfway down the eyes. The third joint of 

 the antennae is not much longer than the first. The auxiliary 

 and first longitudinal veins are not distinctly separated for the 

 greater part of their length. The posterior cross-vein is some- 

 times sinuated, but more often it is nearly straight. 



Trichophthicus dolosus, sp. nov. 



Frontal band black, face pale-fulvous ; antennae piceous. 

 Thorax greyish-brown, with three dark longitudinal streaks ; 

 scutellum greyish-brown. Abdomen grey ; each of the middle 

 segments with a pair of triangular dark spots, and a central 

 narrow dark stripe ; apical segment with a central triangular 

 dark spot, the apex of which does not reach the end of the 

 abdomen. Femora grey ; tibiae dark - fulvous ; the tarsi 

 blackish. Squamae brownish. Wings tinted brownish, darker 

 along the anterior portion and at the base ; veins brown. The 



