76 Transactions. — Zoology. 



prominent. Abdomen depressed, oblong or linear. Squama? 

 small, not much larger than the antisquamae. Wings with the 

 anal veins prolonged to the margin. Legs black" (Meade). 



Phorbia novse-zealandiae, sp. nov. 



Female. — Greyish -brown, the frontal band and eyes 

 brownish-red ; the antennae and legs black. Thorax with a 

 central dark band, and two rows of dark spots on each side of 

 it. Abdomen with an interrupted central dark band. Squamae 

 white, margined with rusty. Halteres yellowish - white. 

 Wings pellucid, the veins black. The distance between the 

 two cross- veins is about one and a half times the length of the 

 posterior cross-vein ; the distance of the posterior cross-vein 

 from the margin is about three-fourths of its length. Length, 

 5 mm. ; wing, 5 mm. 



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



The squamae and antisquamae are moderate in size, and 

 nearly equal. The sixth longitudinal vein reaches the margin 

 of the wing. 



Genus Cosnosia, Meigen (1826). 



Eyes bare, widely separated in both sexes ; arista pubes- 

 cent or bare. Forehead not projecting. Squamae larger than 

 the antisquamae. Abdomen of the male generally subcylin- 

 drical and thickened at the end. Sixth longitudinal vein more 

 or less abbreviated. 



Key to the Species. 



Cross-veins of wing bordered with dusky. 



Thorax grey .. .. .. .. .. C. spinipes. 



Thorax reddish-brown . . . . . . C. smithii. 



Cross-veins of wing not bordered. 



Vertex dark reddish-brown . . . . . . C. rubriceps. 



Vertex brownish-white. 



Antennae fulvous .. .. .. .. C. purgatoria. 



Antennae picaous . . . . . . . . C. algivora. 



Coenosia spinipes. 



Ccenosia spinipes, Walker, Cat. Dipt, in Brit. Mus., p. 969 

 (1849) ; Hutton, Cat. Dipt. N.Z., p. 64. 



" Cinerea, capite fulvo, thorace fusco trivittato, abdomine- 

 maculis sex trigonis canis ornato, palpis fulvis, antennis nigris, 

 articulo 2° ferrugineo, pedibus fulvis, tarsis nigris, alis cine- 

 reis." Length, 5 mm. (Walker.) 



Hab. New Zealand (Voyage "Erebus" and "Terror"). 



I have not seen this species ; probably it was taken at the 

 Bay of Islands. 



