11)2 Transactions. 



than the 2nd, both bristly above and below (fig. 24) ; flagellnm clavate, 

 distinctly 8-segmented, minutely pubescent, and terminating in short hairs ; 

 face with a dense and brownish tomentum, covered with long black hairs 

 except on the lower part, there being only a few very short ones at the 

 epistome ; proboscis and palpi tawny, the latter projecting beyond the 

 former; 1st palpal joint longer than the 2nd (fig. 25), both bearing long 

 and stiff bristle-like hairs ; posterior orbits not broad, of about equal width 

 throughout, and with long black hairs below ; there are distinct postorbital 

 bristle-like hairs ; occiput black, depressed, and hairy. 



Dorsum of thorax violet-black, slightly shiny with short and delicate 

 greyish hairs ; pleurae black, shiny, and hairy ; scutellum bare, shiny violet, 

 the 4 spines distinct and brown ; halteres pale brown. 



Legs stouter than usual, indistinctly banded with brown and dark 

 brown, the latter colour on the distal half of each joint ; posterior femora 

 club-shaped, their tibiae slightly thickened, and tarsi light brown except 

 apex of the slightly thickened protarsi, epitarsi, and the whole of the re- 

 maining joints, which are dark brown ; the tarsi of the other legs are also 

 darker distally, but their protarsi are not so light in colour as the posterior ; 

 all the protarsi are barely half the length of the whole joint. 



Wings faintly tinged with brown ; veins brown, the auxiliary vein paler; 

 the stigma brown but the pigment separated from the 1st longitudinal 

 vein ; 1st section of 2nd longitudinal vein — that is, the part between the 

 origin and the orgin of the 3rd vein — sinuated and about twice the length 

 of the anterior cross-vein ; 1st section of 3rd vein shorter a little than the 

 anterior cross-vein, which is more or less anteriorly oblique ; 3rd vein dis- 

 tinctly sinuated, the anterior branch forming an acute angle and strongly 

 sinuated ; apex of discal cell behind the line of end of second vein ; vein 

 separating the two basal cells obsolete only along proximal half ; 1st, 3rd 

 (except anterior branch), 5th, and 6th longitudinal veins bristly (fig. 26). 



Abdomen brown (except the 1st segment, which is black) and darker 

 at the sides, with 7 segments, about as wide as the thorax, not apically 

 truncated but more or less pointed, and terminating in the tawny genital 

 organs (fig. 27, a and b). The apical segment, slightly down -turned and 

 projecting backward, is a pair of short hairy boat-shaped appendages 

 separated by a cone-shaped structure (a), beneath which is a pair of strong 

 inner claws (6), and outside these long claw-like bristles. 



<$. Length, 6 mm. ; wing, 5 mm. 



Habitat. — Dunedin, November (Howes). 



B. lacuans n. *]>. 



o (?). Eyes minutely hairy and dichoptic ; front shiny bluish-black, 

 with a few delicate hairs and a patch of silvery tomentum just above the 

 antennae ; this tomentum is darker in certain lights and notched along 

 posterior margin ; antennae situated about the middle line of head or 

 perhaps a little below, not elongate, not as long as width of an eye, blackish- 

 brown, the base of the flagellum dark testaceous ; 1st and 2nd joints short, 

 of about equal length, and bristly ; flagellum with a dense pubescence, 

 7-segmented, the 1st broad, the ultimate about twice as long as the pen- 

 ultimate and terminating in a tuft of hairs. Face black, thinly hairy and 

 with a delicate greyish tomentum ; proboscis pale yellow ; palpi tawny, 

 pubescent, and 2-jointed, projecting beyond the proboscis ; ' 1st joint hairy, 

 lighter in colour than the 2nd, which is fusiform and terminates in a pair of 



