Hutton. — On the Diptera braehycera of New Zealand. 57 



outwards; a cubital appendix. Length, 12^ mm.; wing, 

 10|mm. 



Hab. Mount Egmont, Taranaki (Captain Broun). 



Genus Cerosomyia, gen. nov. 



' Vertex produced forwards and upwards into a blunt 

 hollow process, which forms a hood over the bases of the 

 antennas, completely hiding their first and second joints, and 

 sending downwards, on each side, a ridge which runs outside 

 the facial ridges. These genal ridges are bare, but the facial 

 ridges inside them are armed with setae throughout their 

 whole length. Antennae long, reaching the epistome, lodged 

 in a deep facial groove ; the second joint short, the third 

 more than four times its length ; arista minutely pubescent, 

 the second joint short. Eyes bare, or nearly so. Front 

 broad, slightly grooved in the middle, with several rows of 

 bristles on each side, of which the inner row is longer than 

 the others. Cheeks bare. Vibrissas just above the upper 

 edge of the mouth. Face shorter at the mouth than at the 

 bases of the antennae. Wings without any conspicuous costal 

 bristle. First posterior cell open, and ending before the tip of 

 the wing ; last section of the fifth longitudinal vein about one- 

 fourth the length of the previous section ; the chief cross-vein 

 lies inside the end of the first longitudinal. Abdomen with 

 discal and marginal setae. 



A remarkable genus, easily recognised by the frontal 

 process. 



Cerosomyia usitata, sp. nov. 



Front dark-brown, with some grey tomentum ; frontal 

 projection blackish-brown ; cheeks reddish- brown - , the lower 

 face with silvery tomentum. Proboscis and palpi brown. 

 Thorax dark-brown, the scutellum tawny. Abdomen dark- 

 brown, tessellated on the sides with black and white. Legs 

 black. Squamae white. Wings pellucid, the veins brown. 

 Fourth longitudinal bent at an obtuse angle, the bent por- 

 tion nearly straight ; posterior cross-vein slightly sinuated. 

 Length, 10 mm. ; wing, 6^ mm. 



Hab. Christchurch (F."W. H.). 



A single specimen. 



Genus Phorocera, E. Desvoidy (1830). 



Ocellar bristles pointing forwards ; cheeks bare ; facial 

 ridges armed with bristles throughout the greater part of their 

 length ; vibrissas on a level with the front edge of the mouth. 

 Eyes hairy. First posterior cell ending at some distance in 

 front of the tip of the wing ; the last section of the fifth longi- 

 tudinal vein less than one-third of the preceding vein. In 



