310 Transactions. 



tibiae rather thickened distally, their tarsi distinctly broadened (fig. 45) ; 

 anterior protarsi produced on each side as a process ; mesotarsi broadest, 

 the following joints shortening and narrowing ; on lower side of anterior 

 tarsi are golden bristle-like hairs ; middle tibiae with a row of short 

 blackish apical bristles beneath. Wings clear, stigma brownish, veins 

 brown but paler basally ; halteres pale brown. 



Abdomen elongate and rather ovate (fig. 46), shiny blue-black with 

 indistinct areas of pale-greyish tomentum and hairs on 2nd, 3rd, 4th, and 

 5th segments, arranged as in figure ; sides of abdomen with short white 

 hairs. 



$. Length, 7-5-8-5 mm. 



Holotype : No. 557, D. M. 



Habitat.— Central Otago and Moutere Inlet (D. M.) ; Waitati (C. E. 

 Clarke). 



P. clarkei n. sp.* 



This species resembles ligmidus in general form and colour. 



cJ. Front shiny black with a tinge of green and clothed with black 

 bairs ; eyes holoptic ; antennae minutely pubescent, causing a greyish 

 reflection ; 1st and 2nd joints black ; 3rd ovate, orange-red with a black 

 upper edge and tip. Outline of face as in lignudus but the prominence 

 not so pronounced ; face shiny black, greyish-pruinose above orbito-facial 

 groove, with golden reflections, and clothed with black hairs ; cheeks black 

 with black to brownish hairs ; proboscis black, the labella orange-brown ; 

 occiput black with a greyish reflection, the orbits clothed with greyish hairs. 



Thorax and scutellum shiny bronzy-black, thinly clothed with blackish 

 hairs. Wings slightly dusky but clearer basally ; stigma smoky ; halteres 

 brownish. Coxae blackish-brown and rather hairy ; femora blackish- 

 brown, golden-pruinose and brownish beneath basally, tawny apically ; 

 clothed with long, delicate, scattered, golden hairs, and a row of small black 

 bristles along lower side, longer on posterior femora ; tibiae tawny but 

 brownish along the middle, the anterior pair with a distinct fringe of golden 

 and black bristle -like hairs along lower side ; posterior pair thickened 

 distally ; tarsi black with a golden or brownish reflection and clothed with 

 short bristle-like hairs ; the posterior and anterior tarsi with a distinct 

 golden brush of short rigid hairs beneath ; anterior tarsi slightly broadened, 

 the posterior, particularly the protarsi, more so. 



Abdomen elongate, the sides parallel ; deep blue, dull ; clothed with short 

 silvery hairs, long and delicate along the margins of 1st and 2nd segments ; 

 a cupreous area sometimes silvery owing to arrangement of hairs, and seen 

 only in some lights, at anterior angles of 2nd, 3rd, and 4th segments ; 

 surface of abdomen transversely rugose ; genitalia brownish-yellow. 



$. Differs from <J in the following characters : 3rd antennal joint 

 mostly black, the orange-red being restricted to lower half of joint. Dorsum 

 of thorax shiny brownish-black ; scutellum shiny blue-black. Anterior 

 tibiae and tarsi thickened ; the epi-, meso-, and meta-tarsi of anterior legs 

 short and broad, the onychotarsi small (fig. 49). 



Abdomen slightly ovate, with an olive-green tinge in some lights, and 

 without the cupreous areas at anterior angles of segments. 



c? and $. Length, 8 mm. 



Syntype : No. 1230, D. M. 



Habitat.— Eotorua and Te Wairoa (D. M.). 



* Named after Mr. C. E. Clarke, of Dunedin. 



