IV 
APPENDIX 
black, apparently nude ; palpi testaceous, with dark scales ; antennae dark-brown, with narrow, 
pale bands, basal joint half testaceous, the inner half darker, base of the second joint testaceous, 
basal joint with a few small scales on the inner side, and minute curved hairs ; proboscis deep 
brown ; eyes black and golden. 
Thorax deep chestnut-brown, with narrow, curved, deep-brown scales and ornamentation 
of similar bright golden ones, the latter most prevalent over and in front of the roots of the wings. 
Scutellum brownish, with flat, black scales on the middle lobe ; narrower, rather curved, creamy 
ones on the lateral lobes, and with deep-brown border-bristles ; metanotum brown ; pleurae 
brown, with large patches of creamy scales. 
Abdomen deep blackish-brown with narrow, white, basal bands, first abdominal segment 
rather ochraceous, covered with dusky-black scales and pale-brown hairs ; posterior border-bristles 
chestnut brown, alternately long and short ; venter mostly creamy white with narrow dark apical 
bands to the segments ; the dorsal white bands form more or less white lateral spots. 
Legs dark brown, pale at the base, femora grey ventrally ; femora, tibiae, and metatarsi 
spiny ; fore and mid ungues equal uniserrated, hind equil and simple. 
Wings with the fork-cells rather short ; scales brown ; first submarginal cell very little 
longer and slightly narrower than the second posterior cell, their bases about level, stem of the 
former equal to about half the length of the cell, of the latter nearly two-thirds of its length ; 
posterior cross-vein a little more than its own length distant from the mid cross-vein. 
Halteres ochraceous, with pale scales over the knob, and dark ones on one side. 
Length.-—^ mm. 
$ . Antennae black, with dense black plumes ; palpi pale ochraceous, densely covered witli 
black scales, the antepenultimate joint with two narrow pale rings ; apical joint small, a little more 
than half the length of the penultimate joint, acuminate, penultimate joint wider than the apical, 
the antepenultimate expanding at the tip, the last two with long, brown hair tufts on one side, 
especially the penultimate, a few long hairs on the apex of the antepenultimate, and a few long 
black bristles on the apex of the last two joints ; proboscis deep brown, almost black. Pore and 
mid ungues unequal, the larger uniserrated ; hind ungues equal, small and simple. Fork-cells of 
wings small ; the first submarginal cell shorter and considerably narrower than the second 
posterior, its stem nearly equal to the length of the cell ; stem of the second posterior cell equal 
to the length of the cell. 
Length. — 4 mm. 
Habitat. — Bonny. 
Time of Capture. — May. 
Observations. — Described from a series of 9 ' s an d a single $ in the collection of the 
Expedition. It is a clearly defined species, with banded abdomen and unbanded legs. The 
deep chestnut-brown thorax and grey and black head and unbanded legs separate it at a glance 
from all other African Stegomyias I have seen, except S. nigeria, from which it differs in thoracic 
ornamentation, the two parallel pale lines on the mesothorax of S. nigeria being absent. 
VIII. Stegomyia nigricephala. Nov. sp. 
(Fig- 3, PI- I) 
Head entirely black. Thorax dark-brown, with bronzy-brown scales. Abdomen black, 
with small, white, basal, lateral spots. Wings with dark-brown scales, and slightly tinged with 
brown. Legs dark-brown, unbanded. 
