Hutton. — On the Diptera brachycera of New Zealand. 73 



of the wing; the sixth longitudinal vein extends about three- 

 quarters of the way from the basal cell to the margin of the 

 wing. 



Genus Homalomyia, Bouche (1834). 



Head smooth and semicircular; eyes large, covering the 

 sides of the head ; bare and subcontiguous or approximate in 

 the male. Arista subpubescent or bare, with the second joint 

 often rather elongated. Squamae moderate, larger than the 

 antisquamae. Abdomen mostly elliptical and flattened in the 

 males, and marked with an angulated dorsal stripe ; oval and 

 immaculate in the females. Wings with the sixth longi- 

 tudinal vein shortened, and the seventh longitudinal curved 

 towards its extremity. 



In the New Zealand species the eyes and facial ridges are 

 bare, and the arista is pubescent. The antenna? are short, 

 and the third joint is about twice the length of the second. 

 There is no tubercle or thickening on the middle tibiae of the 

 males. In the females the squamae are small, and not much 

 larger than the antisquamae. A short costal bristle is some- 

 times present. 



Key to the Species. 



Abdomen diaphanou9 near the base . . . . . . H. canicularis. 



Abdomen not diaphanous near the base. 



Legs fulvous . . . . . . . . H. fulvescens. 



Legs black. 



Wings smoky . . . . . . H. fuliginosa. 



Wings clear. 



Distance between cross-veins one and a half 



times the length of the posterior . . H. rava. 

 Distance between cross veins rather more 

 than length of posterior oross-vein. 

 Body brown . . . . H. badia. 



Body grey .. .. .. H.fraxinea. 



Homalomyia canicularis. 



Musca canicularis, Linn., Syst. Nat., ii., 992 (1761). 



Head silvery. Thorax grey, with four brown stripes. 

 Abdomen testaceous, and semidiaphanous towards the base, 

 with the exception of a dorsal stripe, which is dilated on the 

 borders of the second and third segments. Length, 5-6 mm. ; 

 wing, 5-6 mm. 



Hab. Throughout New Zealand. Introduced. 



Homalomyia fulvescens, sp. now 



Female. — Frontal band dark-brown ; the ocellar triangle, 

 margins of vertex, and face yellowish- white. Antennae tes- 

 taceous. Thorax yellowish -brown, with indistinct darker 

 bands ; scutellum yellowish-brown, bordered on the sides with 



