Platychirus. 



207 



follow two more or less separated clumps of tangled, black hairs, 

 likewise with the apex curved forwards, and after them about three 

 black, bristly hairs; on the postero-ventral side are shorter and finer 

 hairs; front tibiæ evenly dilated about from the base, in the apical 

 third more suddenly dilated towards the posterior side 

 and with the posterior apical corner produced ; they are 

 whitish, the margins black except at base, and on the 

 ventral side there is a dark, oblique, transverse band 

 above the middle, and a dark, longitudinal stripe below 

 it as well as a couple of black, transverse stripes at 

 apex towards the anterior side ; the tibiæ have a short, 

 blackish ciliation on the anterior margin, and long, black 

 hairs above towards the posterior margin, and a couple 

 of long hairs in the middle of the postero-ventral margin ; 

 the metatarsus is dilated, as broad as the end of tibia, 

 not three times as long as the second joint and about 

 as long as the three foUowing joints; these latter de- 

 crease evenly in breadth and are subquadrate; the 

 metatarsus is whitish, somewhat blackish below with a 

 transverse, whitish band in the middle; the other joints 

 are more yellow ; the blackish ciliation on the anterior 

 margin of tibiæ is produced along the margin of meta- 

 tarsus. The middle trochanters have a brush of short, 

 black bristles below ; the middle femora have a row of 

 black bristles below, and at the apex a single, fme, 

 recurved hair; they have further some long, yellow 

 hairs below about the middle, and shorter, yellow and 

 black hairs on the posterior side ; the middle tibiæ are 

 simple, mainly short-haired, but with a few longer hairs ventrally at 

 the base, a couple on the postero-dorsal side in the middle and some 

 curved, bristly hairs ventrally at the apex; hind femora with long 

 hairs on the anterior side, short, erect hairs on the posterior side, 

 hind tibiæ short-haired, with some long hairs on the antero-dorsal 

 side about and below the middle, the latter dark or yellow, all the 

 others pale; hind metatarsi very slightly thickened. Wings hyaline to 

 a little brownish tinged. Squamulæ whitish or brownish white, with 

 a darker margin and a yellow fringe. Halteres yellowish, the knob 

 more or less brownish. 



Female. Frons and epistoma broad, the former bluish with two 

 small side dust spots; the hairs dark, only pale above the antennæ; 

 epistoma with white hairs, shorter than in the male. Thorax bluish 

 black, shining, short-haired. Abdominal spots blue, second and third 



Fig. 103. 



P. albimanus ^, 



right front leg 



from below. 



X 20. 



