142 F. W. EDWAKDS — SOME NEW WEST AFKICAN SPECIES OP 



Anopheles (Myzomyia) umbrosa, Theo. 



Myzomyia funesta var. umbrosa, Theobald, Mon. Ciil. III., p. 34 (1903). 



Mr. G. A. K. Marshall has shown me five specimens of this species which have 

 been sent to the Entomological 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. umhrosa the first fork-cell is slightly 

 shorter than the second, another important difi'crence from A. funesta, in which 

 the first fork-cell is markedly the longer. 



Anopheles (Myzomyia) flavicosta, sp.n. v. 



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 bauds. 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. Antenna! clothed with whitish hairs, segments 2-4 with a few white scales. 

 Palpi rather thin, but shaggily scaled towards the base ; a narrow white baud 

 between the first and second joints, a broad one before the apex, and another 

 equally broad at tlie tip. Proboscis 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 numerous in front. Prothoracic 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. Leys dark brown, with narrow, ochreous bands at the tips of 

 the tibife 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. 



Northern Nigeria : Baro, 21. X. 1910 {Dr. A. Inyram). 



Type and one other female, in perfect condition, in the British Museum. 



