130 Orthorrhapha brachycera. 



Syst. Beschr. IV, 99, 44. — DoUchopus parvulus Zett. 1843. Dipt. Scand. 

 II, 555, 46, et 1852. XI, 4294, 46. — DoUchopus agilis Zett. (nec Meig.) 

 1849. Dipt. Scand. VIII, 3081, 43-44, et 1852. XI,' 4294, 43-44. 



Male. Vertex and frons green. Epistoma narrow, silver-white. 

 Palpi pale yellow. Occiput green, greyish pruinose; postocular bristles 

 yellowish belovv, black above. Antennæ about as long as the head, 

 third joint as long as, or slightly longer than broad, convex below, 

 straight above, and thus the point turned dorsally; the basal joints 

 are yellow, darkened to blackish above, but sometimes so slightly, 

 that it is almost imperceptible; the third joint black or brownish. 

 Thorax green or more æneous green, generally with a more or less 

 distinct brighter middle stripe; it is greyish pruinose, very slightly 

 shining; scutellum fmely yellow pubescent; postscutellura green, greyish 

 pruinose. Pleura greenish, grey pruinose; propleura with few, fme, 

 pale hairs above, and with a black prothoracic bristle. Abdomen 

 green, more or less with golden or coppery reflexes, sometimes quite 

 coppery ; it is distinctly white pruinose, most down the sides, and there 

 are very narrow, dark hind margins to the segments, or these are 

 wanting; abdomen clothed with short, black hairs, and it has some- 

 what long hindmarginal bristles, longest behind and on the first seg- 

 ment. Venter greyish, slightly pale-haired. Hypopygium black, slightly 

 æneous, greyish pruinose; eighth segment with black hairs; there are 

 somewhat projecting posterior ventral lobes with the point turned 

 upwards, and also a projecting middle lobe on the left side; the 

 median inner lamellæ are hook-shaped, strongly and angularly bent 

 and ending with a little hook or spine; the lateral inner lamellæ are 

 also curved strongly downwards, dilated and with a dilatation at the 

 apex ; the outer lamellæ are somewhat roundish, whitish with a some- 

 what broad, blackish margin along the ventral, apical and outer part 

 of the dorsal edge; at the end there are about three long teeth, with 

 black, curved hairs, and dorsally to them a pair of strong hairs; the 

 ventral margin is serrated, with curved hairs, and on the inside 

 inwards curved hairs. Legs pale yellow or whitish yellow, front 

 coxæ whitish pruinose anteriorly; posterior coxæ yellow, only the 

 middle coxæ with a grey stripe outwards; the anterior tarsi more or 

 less infuscated from the apex of metatarsus outwards, being darkest 

 to black towards the apex, the middle tarsi sometimes with the four 

 last joints black ; the apex of the hind tibiæ and the hind tarsi black. 

 The legs have short, blackish hairs, the front coxæ are fmely white- 

 haired; the femora give the impression of being more bare below 

 and posteriorly than commonly, but they are in reality finely pale- 

 haired; posterior femora with one preapical bristle; front tibiæ with 



