TEN NEW AFRICAN HAEMATOPOTA. 151 



Thorax dark blackish grey, dorsum clothed with close-lying whitish pubescence. 

 Scutum with rather inconspicuous grey markings arranged on the usual plan ; 

 median pale stripe running the whole length of the scutum ; lateral stripes usually 

 not reaching the post-sutural spots ; pale area before scutellum consisting of four 

 contiguous more or less triangular spots, the inner and larger pair with their apices 

 pointing forwards in a line with the post-sutural spots. Scutellum sometimes paler 

 in the middle, especially towards the tip. Pleurae very little lighter than the dorsum, 

 with rather short whitish hair. 



Abdomen rather short and stout, dark blackish-grey, sometimes with a brownish 

 tinge ; all the tergites with the posterior margins conspicuously hght greyish, and all 

 except the first with paired rounded brownish-grey spots. Pubescence short, mainly 

 black, but with some pale hairs on the lateral and posterior margins of the segments. 

 Venter coloured like the dorsum, but without rounded paired spots. 



Legs : Front legs black ; coxae and under side of femora more grey ; tibiae with 

 a moderately broad and rather ill-defined pale ring near the base, very much swollen 

 a little beyond the middle, but somewhat contracted again apically. Middle and hind 

 legs with the femora dark grey, blackish towards the tips, tibia blackish with two 

 rather ill-defined brown rings ; tarsi blackish, the basal half of the metatarsi obscurely 

 pale. Hind tibiae rather stouter and with the pale rings less conspicuous than in the 

 middle pair. 



Wings rather dark grey, no darker clouds over cross- veins ; stigma entirely dark ; 

 markings well-defined, white ; the spot near the tip is broad and conspicuous. 

 Squamae brownish, the margin darker. Halteres with pale yellowish stem, knob 

 blackish brown with a lighter brown tip. 



Length, 7 mm. ; wing-length, 6-8 mm. ; width of head, 27 mm. ; width of front 

 at vertex, "9 mm. 



British East Africa: Kuja Valley, S. Kavirondo, 4,000ft., 30.iv.-l.v.l911 

 (S. A. Neave). 



A series of 78 ? taken by Mr. Neave, of which 12 (including type) have been 

 presented to the British Museum by the Imperial Bureau of Entomology. 



H. crassicrus belongs to the same group as H. vexans, Aust., and H. maculosi fades, 

 Aust. It is rather closely allied to the latter, but differs in having only two 

 distinct black spots on the face, considerably shorter antennae, broader front, more 

 spotted and rather broader abdomen, less distinctly ringed tibiae, and darker halteres. 



Haematopota mordens, sp. nov. (PL II, fig. 8). 



$. Head (fig. 5) : Face and jowls greyish, without definite markings, hair whitish. 

 Front brownish, side margins and outlines of lateral black spots pale grey, the spots 

 round, separated from the eye-margins. Frontal callus shining blackish, not much 

 wrinkled, rather narrow, almost but not quite touching the eyes ; its lower margin 

 concave, its upper margin more or less straight, slightly raised in the middle. Spot 

 below callus velvet-black. Antennae dark brownish ; first joint dull, greyish tinged, 

 .somewhat swollen, only about twice as long as its greatest breadth. Palpi greyish- 

 brown, clothed with black hair. 



