544 Rev. K. St. Aubyn Rogers' Bionomic Notes on 



The rainfall at Machakos for the first five months 

 of 1900 and 1908 is quoted below, extracted from the 

 Meteorolog. Records of the Agricult. Dep., B. E. A. : — 



The result of this late commencement in the present 

 year is well seen in the series I have taken. P. sesamus 

 was very common, but I only saw ooie dry form, which 

 I took — a very fresh specimen. All the remainder, in all 

 stages of freshness, were Wet, though one is a little 

 intermediate. I think this is very remarkable, and may 

 have some bearing on the stimulus. I should say that 

 Mukaa is a dry place, and very open with little bush 

 even. I searched the lower valleys and in the very 

 sparse woods, but the single specimen was the only one 

 I saw. 



[The specimens obtained by Mr. and Mrs. S. L. Hinde 

 are quoted below from Trans. Ent. Soc. Lond., 1902, 

 p. 447, etc. 



Machakos Road, May 22, 1900. — Twelve F. sesamus,-^ 

 6 wet, mostly worn; 6 dry and fresh. 



Machakos, June 6, 1900. — Six P. sesamus, — 2 wet ; 1 on 

 the wet side of intermediate ; 3 dry. All were fresh 

 except one of the wet forms. 



The comparison with Rev. St. Aubyn Rogers' captures 

 is very striking, and the specimens collected by the same 

 naturalist on Kilimanjaro in the autumn of 1905 should 

 also be compared. See Proc. Ent. Soc. Lond., 1906, 

 pp. Iviii, lix, where the capture of many dry forms and 

 a single wet is recorded. The latter, a fresh male, was 

 taken Sept. 22, m coitu with a slightly worn and much 

 torn dry female. The dry forms were mostly worn. 



E. B. R] 



b. Precis antilope. 



Babai, 1906. 



I spent a day or two in Taita on my way down, but the 

 weather was not good, and I got nothing except on the 

 march in to Voi, when I captured, among other things, 

 the wet-season phase of Precis antilope, — the only example 



