8 Transactions. — Zoology. 



Hab. Auckland (Captain Broun) ; Christchurch and 

 Otago (F. W. H.). 



There is no difference in size between the sexes. Length, 

 10-12 mm. ; wing, 8-10 mm. The female wants the grey hairs 

 on the sides of the thorax, and the green margin of the 

 abdomen is not so broad. The black of the vertex ends 

 anteriorly in a line which is convex, or sometimes slightly 

 emarginate in the middle. 



Odontomyia chloris. 



Stratiomys chloris, Walker, Cat. Dipt, in Brit. Mus., part v., 

 Supp., p. 57 (1854). 0. chloris, Hutton, Cat. Dipt. N.Z., 

 p. 37. 0. hypochlora, Nowicki, Mem. Krakauer Akad. 

 Wissen., ii., p. 15 (1875); Hutton, Cat. Dipt. N.Z.,p. 38. 

 In the female the black of the vertex has a deep central 

 square-ended notch, which extends further back than the ter- 

 mination of the black at the eyes. The scutellum is green 

 with a black base. The male has grey hairs on each side of 

 the thorax. Length, 8-10 mm. ; wing. 7-8 mm. 



Hab. Auckland (Colonel Bolton) ; Christchurch (F. W. H.). 



Odontomyia collina, sp. nov. 



Antennas piceous ; spines of scutellum well developed, 

 tawny. Halteres pale-green. Wings hyaline, the stigma and 

 veins tawny ; three posterior cells. Abdomen black above, 

 margined with green or tawny, which is broad in the male, 

 narrow in the female. 



Male. — Thorax and scutellum black. Legs tawny, the 

 femora fuscous. Length, 6 mm. 



Female. — Face yellow, the black of the vertex convex in 

 front. Thorax piceous, with yellow hairs. Scutellum green, 

 with a black spot at the base in the centre and one at each 

 side. Legs tawny. Length, 8 mm. 



Hab. Lindis Pass, Otago (F. W. H.). 



Odontomyia chathamensis, sp. nov. 



Head pale-tawny (green ?) on the face, the vertex black in 

 the female. Antennae and proboscis black. Thorax black, 

 with scattered fulvous hairs in both sexes, while in the male 

 those on the sides are abundant ; scutellum black margined 

 with tawny ; the spines tawny, small but distinct. Abdomen 

 above black margined on each side with pale-tawny, which is 

 broader in the male than in the female ; below very pale- 

 tawny. Halteres nearly white. Legs tawny, the outer sur- 

 faces of the tibiae sometimes brown. Wings hyaline, the 

 stigma and the outer portion of the costal cell tawny ; three 

 posterior cells. Length, 9-11 mm. ; wing, 7-10 mm. 



Hab. Chatham Islands (Fougere). 



