310 



MR, S. A. NEAYE — REPORT ON A JOURNEY 



near the sources where there is running water or at least considerable pools 

 in the bed o£ the stream. 



Further work in mapping the distributiom of G./usca in the Luangwa 

 Valley is urgently required, especially during the wet season. Besides 

 the tributary streams around, and perhaps above, Hargreaves, I am inclined 

 to think that this species may also occur in the valley of the Lukashashi 

 River to the west, where the conditions of elevation etc. are very similar. 



Of the other biting flies the Tabanid.e were, as usual, by far the most 

 numerous, and a fine series was obtained, amounting to over 1500 specimens, 



Fig. 6. — Mopani forest, with young zebra. 



nearly all of which were collected at the damp mud and sand at the edges 

 of the small pools which constitute the only water remaining in the smaller 

 streams at this season ; these pools being often only a few yards across and a 

 few inches deep. 



From the middle of July until September 1st very few individuals of 

 the genus Tahanus, and no HwmatoiMa^ were taken in the Luangwa 

 Valley ; but some days later very large numbers of several species made 

 their appearance. 



