142 F. W. EDWARDS—SOME NEW WEST AFRICAN SPECIES OF 
Anopheles (Myzomyia) umbrosa, Theo. 
Myzomyia funesta var. umbrosa, Theobald, Mon. Cul. ILI., p. 34 (1903). 
Mr. G, A. K. Marshall has shown me five specimens of this species which have 
been sent to the Hntemological Research Committee by Dr. T. F. G. Mayer, 
W.A.M.S., who found them at Oshogbo, Southern Nigeria, in December, 1910. 
They agree closely with the type, and are evidently quite distinct from A. funesta. 
One of the most striking characters of the species, which Theobald does not 
mention in his description, is that the palpi are only whitish at the tip, otherwise 
having no pale bands. This peculiarity alone will suffice to differentiate the 
present species from any other of the group Myzomyia, while when the wing 
markings are taken into account it is clear there is no very close relationship 
between A. funesta and A. umbrosa. In A. umbrosa the first fork-cell is slightly 
shorter than the second, another important difference from A. funesta, in which 
the first fork-cell is markedly the longer. 
Anopheles (Myzomyia) flavicosta, sp.n. °. 
Wings yellow, especially towards the costa. Four black costal spots, the 
apical one very small. Five pale fringe-spots, apart from the yellow apex. Legs 
with narrow apical pale bands. Palpi with three pale bands, the two apical ones 
equally broad. 
Q. Head with the usual type of scaling: a tuft of very long white scales on 
the occiput, a patch of white upright forked scales in front, remainder of these 
black. Antenne clothed with whitish hairs, segments 2-4 with a few white scales. 
Palpi rather thin, but shaggily scaled towards the base; a narrow white band 
between the first and second joints, a broad one before the apex, and another 
equally broad at the tip. Proboseis pale at the tip. Thorax with the ground- 
colour ashy-grey above, brown at the sides. Mesonotum with white narrow 
curved scales, which are longer and more numercus in front. Prothoracie lobes 
without scales. Scutellum with about 10 long brownish bristles, and hair-like 
white scales. Wings with the scales mainly yellow, on costa and first vein 
deep yellow. Costa black at the base, and with four black spots, which extend 
on to the first vein ; the fourth is very small and extends also on to the anterior 
branch of the second vein. Third vein almost entirely yellow-scaled. Dark areas 
on the other veins are distributed as follows: nearly the whole of the stem of 
the second fork-cell ; two small spots on the anterior and one on the posterior 
branch of the fourth vein; near the base of the fifth vein and at the base of its 
anterior branch; near the tips of the two branches of the fifth and of the 
sixth veins, Fringe dark grey, with five yellow spots, at the terminations of the 
fourth, fifth and sixth veins; yellow round apex of wing. Stem of halteres 
yellow, knob black. Legs dark brown, with narrow, ochreous bands at the tips of 
the tibiz and of the first four tarsal joints. Abdomen dark brown, covered with 
golden-yellow hair. 
Length of body, 3 mm. ; of wing, 3 m.m. 
NortTHERN Niceria: Baro, 21. X. 1910 (Dr. A. Ingram). 
Type and one other female, in perfect condition, in the British Museum. 
