114 Mr. E. E. Austen on ii^w 



not in contact with eyes, roughly triangular in shape, with 

 their apices pointing downwards and inwards, median frontal 

 spot small, but usually distinct ; palpi greyish buff or 

 isabella-coloured, terminal joint elongate, blunt at tip, but 

 little expanded at base, clothed on outer side with black 

 hairs, pale hairs confined to under side of first and under 

 side of base of second joint ; first and second joints of 

 antenna buft-yellow or orange-bufF, clothed with black hair, 

 third joint ochraceous-buff, rather small, terminal annulus 

 clove-brown, first joint of antennae not incrassate, though 

 its inner margin seen from above is slightly convex, third 

 joint narrow, but little wider at base. Thorax : median grey 

 stripe on dorsum continuous, very narrow ; pectus, pleurpe, 

 and sides of dorsum smoke-grey ; scutellum smoke-grey, 

 with a more or less distinct dark brown blotch on each basal 

 angle. Abdomen : olive-grey spots on dorsum large, roughly 

 circular ; venter grey, with a broad clove-brown median 

 stripe except at base, hind margins of segments narrowly 

 cream-buff". Wings : ajjical sinuous mark usually somewhat 

 broader at its upper extremity, immediately below end of 

 second longitudinal vein, indistinctly bifurcate as in H. sti- 

 mulans, or at least the lower of the two light spots beyond 

 it present in the second submargiual cell ; discal cell with 

 two transverse light marks, and also usually with a light 

 spot at or near each extremity ; stigma similar to that 

 in wing of H. stifnulutis, but paler and slightly shorter. 

 Halteres as in H. stimulans. 



Nyasaland Protectorate, 1907 {Dr. J. E. S. Old). 



A fifth specimen from the Nyasaland Protectorate (Dr. 

 Old), probal)ly taken at the same time and place as the 

 foregoing, differs from the tyi)ical form in having the frontal 

 callus slightly shallower, owing to its upper margin curving 

 downwards somewhat on each side ; since in other respects 

 the specimen agrees with the type it would seem reasonable 

 to suppose that the diffei'cnce in the shape of the callus is an 

 individual one, and that the specimen really belongs to the 

 present species. Care is necessary to distinguish H.furtiva 

 from H. sthniikms, which it closely resembles in fades, but 

 as distinctive characters in the case of the present species it 

 will suffice to note that the frontal callus is clove-brown or 

 black instead of mummy-brown, that it is considerably 

 deeper, does not as a rule taper towards the sides, and is not 

 partly divided in the middle line; that the third joint of the 

 antennae is ochraceous-buff' instead of seal-brown (clove- 

 brown in the case of the last three annuli), and is also 

 rather small ; and that in the wing the light loop and zigzag 



