312 Miss G. Elcardo on 



or brown at tip. Eyes witli two stripes at least. Thorax 

 witli s^'ey stripes. Frontal callus brown, sinning, slightly 

 ]irotiiberant, occupying whole width of head and connected 

 by a short line with middle callus. Forehead grey, with 

 black pubescence towards vertex. Legs reddish. Wings 

 quite clear. 



Tahanus unitceniatus, $ , sp. n. 



Type (female) and another female from Pungwe Valley, 

 S.E. Africa, 1896 (G. A. K. Marshall), 96. 84, at the 

 fortieth mile-peg from commencement of Beira Railway ; 

 one female from Wau, Bahr-el-Ghazal, Egyptian Soudan, 

 25. vii. 1905 {per Dr. A. Balfour), "at light!" 



A species probably nearly related to T. unilineatus, Loew, 

 from Mozambique, but distinguished from it by the redder 

 abdomen, lighter fore tibiae, the more slender palpi, the tri- 

 angular frontal callus, and the larger size (13 mm.). It is a 

 narrow-bodied reddish species, witli a median white stripe on 

 the abdomen and wings almost clear. 



Head small, broader than the thorax. Face reddish, 

 covered with grey tomentum and with short scanty white 

 pubescence; beard white. Palpi yellow, thickly covered 

 with black hairs, long and narrow, only slightly broader at 

 the base, ending in an obtuse point. Antennse bright red, 

 the extreme apex black; the first joint short, broad, with a 

 few black hairs ; the second small, cap-shaped, with black 

 hairs on its upper angle ; the third with an obtuse tooth. 

 Forehead about four times as long as it is broad and the 

 same width throughout, reddish with some little grey tomen- 

 tum ; the callus shining red-brown, convex, oval, becoming 

 narrower at its lower end, whence proceeds a narrow short 

 raised line, which widens to a spindle-shaped callus ; from the 

 vertex a narrow black line proceeds in two branches sur- 

 rounding this last. Eyes with no markings. Thorax reddish 

 brown, with traces of grey tomentum and of three stripes, 

 the sides reddish with grey tomentum. Abdomen narrow, 

 reddish brown, with a greyish-white median stripe reaching 

 the fifth segment, the apex black, the segmentations very nar- 

 rowly white, the pubescence on dorsum mostly black ; under- 

 side testaceous with a black apex, in the other female it is 

 very largely black. Legs reddish, the femora (especially the 

 fore femora) blackish, the fore tibiae blackest at their a})ex, 

 and fore tarsi black. Wings hyaline, the stigma yellowish, 

 the veins yellowish brown (in the other female the fore 

 border has a very slight tinge of yellow) ; the first posterior 

 cell not narrowed. 



