Diptera.] 



SUBANTARCTIC ISLANDS OF NEW ZEALAND. 



133 



Thorax. — Ground-culdui' In-own, with a central grey stripe. This is narrow in 

 irotit. but broadens out in a trumpet-shape to the scutelluni. This stripe is bordered 

 along the stalk of the trumpet by a narrow dark-brown line. Pleurae dark grey. 

 Scuiellum grey, like the stripe. Hn/fere.s vellow. 



Abdomen greyish-green. 



7y(Y/.s black, except the tips of all the knees, which art' narrowly reddish. 



The genitalia in Aphrosylus differ considerably with the species. The present 

 insect has small outer lamellae, wliich are subtriangular in form ; the inner are 

 much chitinized, and are larger than the outer pair. 



Hab. — Bounty Islands. 



Type. — Cambridge Museum. 



SYRPHIDAE. 



Some specimens belonging to the genus Sz/rp/nis were sent both from Carnley 

 Harbour and from Campbell Island. All these can be fairly referred to the species 

 *S. novue-zenlandiae. It is impossible to be sure of the limits of species in such a 

 difficult genus as Sijrp/uts without a good deal of material, and in the absence of 

 this it seems best to put all the species sent under the above name. 



Helophilus, Meigen. Syst. Besch.. iii. 368 (1822). 



Helophilus interruptus, sp. nov. 



A female specimen of the above genus was collected by Messrs. Des Barres and 

 Chambers at Campbell Island. It is superficially very like a rather small H. tri- 

 liiit'dtus. The points of difference are tabulated lielow : — 



Iriliiu-dtiis. 1 

 A pronounced facial tul:)ercle. 



Thorax of a grey ground-c(il( 

 broad black strij^es. 



Front tibiae yellow. 



inlcrrupttis, J 



No real tubercle ; the whole face is formed 

 of a. rounded swellmg. 

 ur. with 3 The ground-colour yellow-grey, with 3 

 broad black stripes, the centre one 

 having a median grey line not extend- 

 ing to the ends of the black one. 



Front tibiae yellow, with a Ijlack ring at 

 the end. 



Hind femora all black. 



Hind tibiae black, with broad vellow 



central band. 

 Wing-veins black, and slightly infuscate. 



Hind femora rufous inside and on the 



distal half outside. 

 Hind tibiae orange, with dark -rufous 



base. 

 Wing-vems yellow-brown. 

 Discal cross-vein oblique, and somewhat Discal cross-vein oblique, but only bent 



S-shaped. where it is crossed by the vena spuria. 



No stigma tic colour. Well-marked black stigma. 



Hab. — Campbell Islands. 

 Type. — Cambridge Museum. 



