Genus Steyomyia. 
311 
to bright chestnut-brown, with silvery patches of flat scales; 
scutellum brown, with silvery flat scales; metanotum deep 
chestnut-brown. 
Abdomen covered with brown scales, some of the apical ones 
being ochraceous brown, the scales appearing slightly metallic 
under the microscope; border-bristles bright golden, there are 
also lateral silvery spots; venter brown scaled. 
Legs brown, coxae brown, each with a small spot of silvery 
scales; femora pale ochraceous at the base and ventrally, apex 
dark brown, with a silvery-white spot just before the apex and 
the tip pure white scaled ; tibiae dark brown, with an apical 
white band; metatarsi brown, with an apical white band, fore 
and mid tarsi brown; in the hind legs the metatarsi and tarsi 
are apically white banded, the last joint being pure white ; fore 
and mid ungues equal, blunt, and each with a blunt tooth ; hind 
ones equal and simple. 
Wings with brown scales of typical form ; first sub-marginal 
cell considerably longer and narrower than the second posterior 
cell, its base nearer the base of the wing, its stem about one-third 
the length of the cell; stem of the second posterior cell not quite 
as long as the cell, posterior cross-vein about twice its own length 
distant from the mid cross-vein ; border-scales deeper brown than 
the fringe; halteres with pale ochraceous stem and slightly 
fuscous knob. 
Length. —3'5 to 4 mm. 
. Palpi brown, with three pale rings, the two apical ones 
on the bases of the two last joints, the last two joints are short, 
about equal, and together not much 
more than half the length of the 
antepenultimate joint; apex of ante¬ 
penultimate and the last two have 
long black hairs and bristles ; an¬ 
tennae banded brown and dull brown¬ 
ish-grey, with deep flaxen-brown 
plumes. On the thorax are also a 
few broad silvery scales in front of the 
scutellum, and there is a silvery-white 
patch of scales at the root of the 
wing on the costa ; the border-bristles 
of the scutellum are deep black, five to the mid lobe and six 
smaller ones between. 
Abdomen of similar colour to the 9 >hut the third, fourth and 
? 
Fig. 95. 
Stegomyia Marshallii. n. sp. 
Ungues of the cf and fore ungues 
of the ?. 
