332 Transactions. 



<$. The markings of the tibiae are more or less distinctly defined ; a 

 distinct transverse groove across front at orbital angulations ; genitalia 

 tawny. 



S. Length, 9 mm. ?. Length, 11 mm. 



Holotype : Hutton's collection, Canterbury Museum. 



Habitat. — Chatham Islands. 



Genus Myiateopa Rond. 



The species of this genus closely resemble those of Helophilus, from 

 which they may be distinguished by the hairy eyes, those of the male being 

 almost holoptic. Myiatropa differs from Eristalis by the open cell ~R ± . 



M. campbelli n. sp.* (Plate LI, fig. 1.) 



This fly is very nearly identical in form and colour with Helophilus 

 car g Mi. 



$. Eyes approximated on vertex, clothed with golden hairs indistinct 

 above but conspicuous in front and below ; front widening anteriorly, 

 orange-brown with darker reflections, and clothed with a brownish pile ; a 

 medio-longitudinal fissure ending half-way down the front at a transverse, 

 central, brownish area, below which the front has a transversely wrinkled 

 appearance ; lunular area orange-yellow but black posteriorly ; a blackish 

 area on front just behind lunule. Antennae shaped as in Helophilus ; 1st 

 and 2nd joints brownish-yellow to brownish-black ; 3rd joint orange- 

 yellow with a silvery reflection and faintly tinged around the border with 

 brown ; arista blackish-brown. Outline of face as in Helophilus ; face a 

 rich tawny colour, transversely wrinkled, and clothed on each side with 

 tawny hairs ; prominence bare, tawny on each side but centrally with a 

 brownish-yellow stripe ; oral margin bordered with blackish-brown, this 

 colour narrowing to the anterior angles ; cheeks and occiput tawny, the 

 former bearded with tawny hairs ; proboscis dark brown, palpi paler. 



Dorsum of thorax clothed with short brownish to tawny hairs ; 3 

 longitudinal broad black stripes, the median stripe furcate and the lateral 

 ones interrupted (fig. 80) ; angles of transverse suture bordered with black ; 

 a short narrow and oblique black stripe at wing-articulation ; dorsum 

 otherwise tawny ; suture from humerus to wing indistinctly black ; pleurae 

 black in ground-colour, the meso-, ptero-, and upper part of sterno-pleurae 

 tawny-pruinose and clothed with tawny hairs ; the stigmata pale tawny. 

 Legs orange -red with a tawny reflection, except the shiny brownish-black 

 basal part of the femora, all of which are clothed with tawny hairs ; the 

 posterior femora not broadened, tapering distally, and with spines below 

 toward apex. Wings faintly tinged basally with yellow ; the stigma pale 

 yellow; veins brownish-yellow; vein R 2 + 3 strongly upturned and curved 

 slightly backward apically (fig. 86). 



Abdomen broad and oval (fig. 84), clothed with short tawny hairs except 

 on black parts ; 2nd and 3rd segments with large orange-red areas 

 separated from each other and from the posterior margin of each segment 

 by black ; on each of these areas centrally is a distinct greyish-yellow 

 circular spot ; the orange-red of 2nd segment encroaches over the posterior 



* Named after Mr. J. W. Campbell, of Christchurch. 



