African Phlebotomic Diptera. 353 



shinhuj, hy the anteimai {at any rate in the ? ) heinrj ex- 

 tremely slender and the frst joint elongate, by the terminal 

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

 outer side, which is strongly convex, ivhile the inner side 

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

 with dark colour interrupted by pale streaks or blotches, 

 being without the peculiar light markings characteristic of 

 Hsematopota. 



Head wide, convex in front, posterior surf ace flattened and 

 excavated; anterior region oi front somewhat tumid, but 

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

 developed or wanting; antenna 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 ^o/^^i 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 j)rominent 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 antennee taken together about two-thirds of length 

 of third joint ; proboscis as in Hamatojwta. Body narrow 

 and elongate, hairy covering short and inconspicuous ; dorsum 

 of thorax without or with no conspicuous markings ; scutel- 

 lum 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. Nuchr. xv. 1889, p. 240), 

 described from the Gaboon, and H. trimaculata, Newsteatl 

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

 p. 42, pi. iv. fig. 2), described from the Congo Free 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- 

 gischcr Anzeiger,' xxx. 13d. 1906, pp. 352-353, fig. 4), 

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

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

 hoAvever, belongs to the Pangoninfe, and consequently has 

 spurs at the tips of the hind tibitL' ; apart from this. Hippo- 



