135 



Nile Province of the Uganda Protectorate. The localities, etc., of 

 the eleven females in the Museum are as follows. Northern Nigeria : 

 Zungeru, July 14th, 1905 (Dr. J. M. Dalziel, W.A.M.S.), and July, 

 1907 (J. Brand] ; Agwatcha, Bassa Province, July, 1906 (Dr. G. J. 

 Pirie) ; Little Koriga River, July 18th, 1907 (J. Brand). Southern 

 Nigeria : On railway at 57| miles camp, Lagos Province, June 12th, 

 1906, " very troublesome to horses " (Dr. R. C. Hiscock, W.A.M.S., 

 per Dr. W. H. W. Strachan, C.M.G.) ; Lower Niger, July, 1906 

 (G. C. Dudgeon). Lado Enclave, 1907 (Captain T. C. Mackenzie, 

 D.S.O., R.A.M.C., attached E.A.per H. H. King). Uganda 

 Protectorate : Nile Province, 1906, " caught on a native in camp ; 

 only specimen seen " (the late Dr. W. A. Densham). 



The wing-markings of this species render it readily distinguishable 

 from Hippocentrum trimaculatum, Newstead, which, according to 

 Mr. G. C. Dudgeon, attacks travellers in hammocks in the vicinity of 

 the Cross River, Southern Nigeria. In H. trimaculatum the costal 

 cells are not suffused with yellow, there is no conspicuous hyaline 

 or semihyaline base to the wing (although the proximal half, 

 especially anteriorly, is paler than the remainder), and no broad, 

 interrupted, obliquely transverse, hyaline band beyond the middle. 

 On the other hand the wing is much more uniformly suffused with 

 brown (darker in the distal half), and the light marks consist of 

 a more or less indistinct pale transverse mark, in about the middle 

 of the anterior half of the wing and immediately before the 

 proximal end of the stigma, a narrow transverse streak just before 

 the tip of the wing, and a mark between these two descending from 

 the costa at the distal end of the stigma. The median mark of the 

 three is sometimes wider than the others, though it may be very 

 indistinct ; it may bifurcate below and even form a more or less 

 complete circle round the fork of the third vein, while occasionally 

 a second small circle is visible below the other. 



