Marshall. — On Neiv Zealand Diptera. 239 



one-third the length of the wing; second longitudinal strongly 

 arcuated, joining the margin some distance beyond the apex; 

 third longitudinal very slightly bent upwards at the fork. 

 I obtained two specimens of this insect in a swamp at 

 Wanganui. 



Diplosis flava, n. sp. Male. Antennae, 0-092 ; wings, 

 0-115 X 0-037; body, 0-059 x 0-013. Joints of the scapus sub- 

 globose, bright-yellow; flagellum cinereous; double joints 

 rather shorter than their pedicels, single joint about a quarter 

 the length of their pedicels ; length of double joints near the 

 base about three times their breadth, near the apex the length 

 is about double the breadth ; terminal joint longer than the 

 three or four double joints immediately preceding it, becoming 

 at its apex a colourless projection closely resembling a broken- 

 off piece of pedicel. Palpi long and slender, light-yellow. 

 Thorax yellow, perfectly glabrous, rather darker on the lateral 

 margins. Halteres with very long and slender pedicels, bear- 

 ing a small pyriform yellow club. Scutellum white, perfectly 

 glabrous. Abdomen pink, with several bristly yellow hairs 

 on the margins of the segments. Legs long and slender, 

 yellow, but rather thickly clothed with small black hairs. 

 Wings almost glabrous, hyaline. Veins colourless, except the 

 basal portion of the costa, which is yellow ; first longitudinal 

 less than half the length of the wing ; second longitudinal 

 strongly arcuated, joining the margin some distance beyond 

 the apex of the wing ; transverse vein half-way along the first 

 longitudinal ; fork of third longitudinal beyond the end of 

 the first longitudinal. 



I obtained a single specimen of this insect in a swamp at 



Wanganui. 



Subsection B. 



Cross-vein very oblique, originating at the root of the first 

 longitudinal vein. 



Sub-genus Epidosis. — Second longitudinal vein sinuous before 

 the cross-vein. Joints of the autennee pedicelled in both 

 sexes, their number variable. 



Epidosis magna, n. sp. (Plate V., fig. 4.) Male. Length of 

 antennae, 0-138 ; expanse of wings, 0-153 x 0-055; length of 

 body, 0-068. Antennae 2 -f 22 jointed, longer than body, pale- 

 brown ; long pedicels ; joints about half the length of the 

 pedicels, sub-globose ; verticils long, arranged in two whorls 

 on the joints ; scapus joints near base of the flagellum almost 

 cylindrical ; joints longest in centre, decreasing in size towards 

 apex. Palpi moderately long. Basal three joints of the flagel- 

 lum covered with scattered black hairs. Thorax deep-brown, 

 with two tufts of long black hairs, one tuft at each side ; collare 

 glistening-white; centre of thorax marked by a cuneiform stripe 



