Miller. — The Dipt era Fauna of New Zealand. 193 



black stiff hairs. The arrangement of the vestiture of both palpal joints 

 gives an indistinct segmented appearance ; in the 2nd joint there appears 

 to be 7 such segments, the 1st distinct and forming a neck. Occiput de- 

 pressed and indistinctly hairy ; posterior orbits much narrowed above but 

 slightly widened below, with long hairs at lower end and beneath the eyes ; 

 posterior orbital hairs present, short and bristle-like — a character of all the 

 species described in this genus. 



Dorsum brilliant bluish-green, the humeri and post-alar calli tawny ; 

 pleurae shiny blackish-brown with a tuft of greyish hairs below the humeri : 

 scutellum brilliant bluish-green margined with tawny, the 4 spines large 

 and tawny. 



Anterior and middle legs tawny with darker markings on femora and 

 tibiae, metatarsi and onychotarsi fuscous, protarsi about half as long as 

 the whole joint. The posterior legs, halteres, and abdomen lost. 



Wings clear but for the dark-brown stigma and a broad transverse median 

 brown cloud ; veins dark brown ; auxiliary vein not sinuated (fig. 28) ; 

 1st section of 3rd vein, if anything, a little longer than the anterior cross- 

 vein ; anterior branch of 3rd vein arising at right angles and slightly curved 

 forward to the costa, the posterior branch almost straight ; anterior cross- 

 vein nearly perpendicular. Apex of discal cell posterior to line of end of 

 2nd longitudinal, which runs almost straight from the 1st vein before 

 turning up to the costa ; vein between the basal cells obsolete and repre- 

 sented by a clear line and furrow ; an oblique vein closing the basal cells 

 behind. 



Length of wing, 5 mm. 



This type, though incomplete, is quite distinct from the other species. 



.Ha&to.— Wallacetown, January (Philpott). 



B. refugians n. sp. 



$. Eyes bare, moderately dichoptic ; front narrow and greyish- 

 yellow, due to a dense tomentum ; ocellar triangle blackish-brown ; antennae 

 situated about middle line of head, blackish-brown with a testaceous band 

 in the middle, in length about half the width of head ; 1st and 2nd joints 

 bristly, the former slightly elongated, the latter shorter and basin-shaped ; 

 flagellum (fig. 29) pubescent, clavate, and composed of 7 segments, the 

 first 4 testaceous and semi-diaphanous, the remainder blackish-brown ; the 

 ultimate segment terminates in distinct hairs. 



Face with a silvery tomentum darker in certain lights, a few scattered 

 yellow hairs and a dark spot beneath the antennae ; there are also a few 

 longer yellow hairs beneath the eyes ; proboscis and palpi a delicate pale 

 yellow, the former with yellow hairs ; palpi not reaching in front of proboscis, 

 2-jointed ; the 1st densely pubescent with longer yellow hairs and a slightly 

 darker reflection, the 2nd about as long as the 1st, minutely pubescent, 

 fusiform, and ending in a distinct blackish-brown bristle ; oral margin 

 shiny blackish-brown with an anterior tubercle. Posterior orbits pubescent, 

 narrowed toward the vertex, and with a tuft of long hairs below ; posterior 

 orbital hairs distinct ; occiput depressed at the vertex, but slightly convex 

 below, and of a greenish-yellow colour. 



Thorax comparatively small considering the abdomen, shiny and bare 

 but for a minute and scattered tomentum on the dorsum ; humeri pale 

 green with a dark mark beneath ; dorsum tawny with darker reflections, 

 the margins of the transverse suture and the anterior margin between the 



7— Trans, 



