140 SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Diptera. 



Coelopa debilis, sp. nov. 



The species is best characterized by its small size, it being only about 3^ mm. 

 long. It is uniformly blackish-grey in colour, with somewhat greyer pleurae and 

 light testaceous legs. The general form is much like that of the female of C, litoralis, 

 but the small size at once separates it. 



The specimens were preserved in spirit. 



Hab. — Monument Harbour, Campbell Island. 



Type. — Cambridge collection. 



Coelopa nigrifrons, sp. nov. 



One male and two females were collected by Mr. Hamilton in 1894 in the Mac- 

 quarie Islands. 



Size. — Body, 4j mm. ; wing, 5j mm. 



Head. — Vertex black, with a slight V-shaped depression bordering the front of 

 the ocellar area ; back of head and upper eye-margins grey, the boundary between 

 the black and grey colours thus forming an M-shaped line. Face and cheeks grey. 

 Palpi brown. Proboscis yellow. Antennae slightly reddish, in tone with the pubes- 

 cent arista mentioned above. 



Thorax. — The ground-colour is a dark blackish-grey, with a slight yellowish 

 pollination. The surface is uniformly covered with short closely set suberect haixs. 

 Scidellum as thorax in colour ; pleurae grey. 



Abdomen piceous. The male genitalia are prominent, but the specimen is not 

 in good-enough condition for figuring or detailed description. 



Legs. — All yellow, with a very slight and indistinct darkening on the upper 

 side of the femora ; somewhat hairy in the female and very hairy in the male. 



Wings slightly suffused with brown, the veins uniformly brown. 



The specimens were preserved in spirit. 



Hab. — Macquarie Islands. 



Type. — Cambridge collection. 



IcARiDiON, gen. nov. 



This genus is founded for a very interesting form, in which the halteres are 

 absent and the wings are reduced to mere strips. The generic name refers to the 

 last circumstance. 



Head. — Frons much protuberant, broad and flattened, and thickly covered with 

 hairs, so that the bristles are but little evident amongst the hairs. Mouth only 

 moderately produced, so that the frons overhangs the rest of the face to a consider- 

 able extent. Labrum prominent. Antennae with joints as in Fucomyia, but with 

 the 3rd joint somewhat larger in proportion ; arista long and sparsely pubescent 

 (recalling the arista of some Borboridae). Eyes longish - oval, with the long axis 

 vertical, more rounded in front than behind. 



Thorax with bristles as in Fucomyia. 



Wings reduced to very short clutinous strips, about J as long as the thorax. 

 Halteres absent. 



Legs as in Coelopa ; more hairy in the male than the female. 



