African Phlebotomic Diptera. 353 



shining, by the antenna* (at any rate in the ? ) being ex- 

 tremely slender and the first joint elongate, by the terminal 

 joint of the palpi in the ? being very large and shining on the 

 older side, which is strongly convex, while the inner side 

 is flattened, and by the wings, though more or less suffused 

 with dark colon?' interrupted by pale streaks or blotches, 

 being without the peculiar light markings characteristic of 

 Hsematopota. 



Head wide, convex in front, posterior surface flattened and 

 excavated ; anterior region of front somewhat tumid, but 

 frontal callus, as seen in Hcematopota, Mg., only partially 

 developed or wanting ; antennce not situate on a well-marked 

 tubercle or prominence ; median region of face somewhat 

 prominent ; eyes bare, and in ? consisting of small facets of 

 equal size ; first joint of palpi slender, terminal joint in ? 

 somewhat like an isosceles triangle in outline when viewed 

 from outer side, with upper margin convex ; first joint of 

 antenna* cylindrical, not at all incrassate, usually more or 

 less curved inwards, six to seven times as long as second 

 joint, which is of usual shape (in typical species very small), 

 and without a prominent angle above or below, third joint 

 slender and elongate, without a prominent angle on upper 

 side near base, terminal portion of third joint consisting of 

 three annuli, last annulus approximately equal in length to 

 the two preceding annuli taken together, first and second 

 joints of antennas taken together about two-thirds of length 

 of third joint ; proboscis as in Hcematopota. Body narrow 

 and elongate, hairy covering short and inconspicuous ; dorsum 

 of thorax without or with no conspicuous markings ; scutel- 

 l a in small, bluntly triangular, not inflated. Wings : venation 

 as in Hcematopota ; upper branch of third longitudinal vein 

 with or without an appendix, which, if present, may be 

 exceedingly small. 



Typical species, Hippocentrum versicolor, sp. n. : Hamato- 

 pota strigipennis, Karsch (Ent. Nachr. xv. 1889, p. 240), 

 described from the Gaboon, and H trimaculata, Newstead 

 (' Annals of Tropical Medicine and Parasitology,' i. 1907, 

 p. 42, pi. iv. fig. 2), described from the Congo Tree State, 

 also belong to this genus. 



In the shape and size of the terminal joint of the palpi the 

 present genus resembles Thriambeutes, Griinberg (' Zoolo- 

 gischer Anzeiger,' xxx. Bd. 1906, pp. 352-353, fig. 4), 

 which was founded for Thriambeutes singularis, Griinb. (loc. 

 cit. p. 353), from Togoland, W. Africa. Thriambeutes, 

 however, belongs to the Pangouinre, and consequently has 

 spurs at the tips of the hind tibiae; apart from this, Hippo- 



