26 DIPTERA 



tlian tlic thorax and more than twice its lengthy thinly clothed with 

 very short black hairs, and having also a few longer grey hairs at the 

 base and on the underside ; the black hairs are more numerous at the 

 tip ; first and second segments short ; third and following segments 

 long, but successively decreasing in length ; third segment with a 

 cross row of punctures on the furrow near the base. Legs black, 

 thinly clothed with short grey hairs ; shanks and feet beset with black 

 spines ; feet long, clothed beneath with dark tawny brown ; claws 

 black; foot-cushions dark tawny; tips of fore-shanks armed with a 

 curved black tooth, corresponding with a large black tubercle at the 

 base of the fore-feet. Wings very slightly grey, dark grey at the 

 tips ; wing-ribs piceous ; veins black, piceous at the base. Poisers 

 yellow. 



Length, 6—7 lines. 



New Zealand (Colenso). 



S. DISCUS. Walker, I.e., p. 358 (Dasypogon), (18-f9). 



Female. Body black. Head covered with tawny down, a little 

 narrower than the thorax, covered on each side of the crown Avith a 

 few black hairs, beset behind the eyes with a row of black bristles, 

 clothed beneath with long pale-yellow hairs ; front and epistome 

 adorned with bright pale -golden down ; clypeus armed with ten long- 

 white bristles ; eyes black, fore-part nearly fiat, distinguished also 

 from the other part by the larger size of its facets ; lip black, clothed 

 at the tip with short tawny hairs ; palpi and hypostoma black, 

 clothed with long pale-yellow hairs. Antennae black, first and second 

 joints with black hairs ; second joint slightly club-shaped, beset with 

 one or two black bristles, a little shorter than the first ; third joint 

 linear, longer than the first and the second ; fourth joint very short ; 

 fifth obsolete. Thorax covered with tawny down, which forms two 

 stripes in the middle, thinly clothed with short black hairs, and beset 

 on each side with some black bristles ; breast covered with pale-tawny 

 down, having a hoary tinge. Abdomen above black, and thinly 

 clothed with very short pale-tawny hairs, red at the tip and along the 

 sides, taAvny and shining beneath, almost linear, nearly as broad as 

 the thorax and more than twice its length ; first and second segments 

 short ; third segment long, Avith a cross row of punctures along the 

 furrow near its base ; the following segments successively decreasing 

 in length. Legs red, almost hairless, beset with black spines, which 

 are much more numerous on the feet than on the shanks or thighs ; 

 thighs paler at the base ; feet black, red at the base ; claws black ; 

 foot-cushions jjale brown ; a black stripe on each fore-thigh ; tip of 



