THE MOSQUITOES OE EGYPT, THE SUDAN AND ABYSSINIA 79 in the female ; fore and mid ungues unequal, the larger uniserrated, the smaller also with a basal tooth, hind equal and simple.

Length. 5 mm.

Habitat. Middle and Lower Sobat; Sennar, Blue Nile; Jebelein, White Nile; Fashoda; Kenissa; Baro; Pibor. This species is very common on both Niles.

Obsei nations. Di. Balfour adds a note as follows i— Band on the proboscis narrower and paler than in the female. There are marked white basal abdominal bands. The white scales on the second segment are arranged like the letter Y : abdomen has also white lateral spots.”

Besides the male, which has not been previously described, several females have been sent me by Dr. Balfour. The anterior thoracic ornamentation is not as pronounced as in the type, but where the pale scaled area joins the dark it is just the same; the abdomen is not so speckled on the posterior segments.

Tczniorhynchus tenax Theobald var maeulipes, n. v.

(Plates IV., Fig. 4; VI., Fig. 4) Very similar to the type, but with the femora and tibia? of all three pairs of legs with a row of clear white spots on one side.

The banding of the legs passes slightly on to the apices of the preceding segments above, forming apical pale spots. The tibiae and to some extent the femora have black bristles. The wings (Fig. 4) resemble the type, but there is some variation in the relative lengths of the fork-cells and their stems ; in the type of this variety the first sub¬ marginal is considerably longer and narrower than the second posterior cell, its stem less than one half the length Fig. 4 Wing of Tceniorhynchus tenax Theo.

var maculipes, n. v. of the cell, its base nearer the base of the wing than that of the second posterior; stem of the second posterior half the length of the cell; posterior cross-vein about twice its own length distant from the mid. Scales shown in Fig. 4, Plate IV.

length. 6.5 mm. Habitat. Kenissa, White Nile and Middle Sobat.

Genus Mimomyia, Theobald.

Mono. Culicid. III., p. 304, 1903.

The female only has so far been described, and in general appearance it resembles a Uranotaenia but the larger fork-cells and narrow-curved scutellar o scales will at once separate it.