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We consider it our pleasant duty to cxprt'ss in thes«' paj^es 

 our gratitude and wannest appreciation at least lo those 

 persons \vhos<' iielp in ilir fulfilment (»f our plans was espe- 

 cially essential. We l>e.n- the follow iuL^- persons to receive our 

 thanks: M-r Moreton Frewen, i^sip (Brede IMace, Sussex), who 

 gave us valuable letters of introduction to his friends in 

 Hritish Kast Africa: Major Grogan, wIk* kindly itffered us his 

 hospitality at his estates in Molo and Loiij^onot; M-r Woosnain, 

 Game Warden and M-r Woodhouse of the Game Department, 

 who greatly assisted us in making up the general route of 

 the travel and in its fulfilment: M-r Gowdey from the Ento- 

 mological Laboratory in Kutebbe, who facilitated our first 

 acquaintance with the tropical fauna; M-r James Martin, to 

 whose kindness we are indebted for our stay in the Mabira 

 forest which gave us most of our material; M-r Hignell, with 

 whom we spent so many pleasant hours at the Longonot 

 Estate and who helped us in collecting the material on para- 

 sites of Mammalia. 



