( ex ) 



stimulate them. As regards Acraea caldarena I. neluska, 

 Oberth., you will, I hope, by this time have received a box 

 that contained some more of it and other butterflies. [This 

 refers to a rare form of caldarena, Hew., used in taste experi- 

 ments with monkeys at Ndala in -Ian. 1917. Unfortunately 

 it did not appear in the later collections, but an Acraea taken 

 at St. Michael's, Aug. 21. L916, may be proved by structural 

 investigation to belong to this form.] 



" I've been trying to catch some Hymenoptera (as there's 

 nothing else) for the Bureau, on Acacia flowers, and got 

 to-day for you a beautiful Hymenopteroid fly fa species of 

 the Syrphid genus Ceria (Cerioides) very near to gambiana, 

 Saund.] — brown and yellow with petiolated abdomen, and 

 wings longitudinal!;/ folded as in. Diploptera which I have 

 never seen before. But the posterior half was folded upwards, 

 so as to lie on. top of the darkened anterior half; the narrow 

 st rips thus produced were held as a wasp holds them, so the 

 resemblance to a wasp of the type of Belonogaster was much 

 accentuated. [See also Dr. G. A. K. Marshall in Trans. Ent. 

 Soc, 1902, p. 534, and pi. xxiii, figs. 40, 41 ; also Dr. G. B. 

 Longstaff in " Butterfly-hunting in Many Lands," pp. 392, 393, 

 pi. iv, figs. 1-10.] 1 also got there 3 lovely A. zetes acara, 

 typically Eastern : the E. form is even lovelier than the island 

 forms, and these were very fresh. [In the first half of Oct. 

 at Itigi 12 acara and li astrigera were taken.] 



" Oct. 21, 1917. Lulanguru (370G ft,), on 

 Central Railway, 17 rn. W. of Tabora. 



"' Since 1 last wrote I have been moved to a place where 

 I really can be of use and am not wasted as I was at [tigi. 

 My present camp, named Lulanguru, is where I was for a 

 brief period at the end of July and beginning' of August, 

 viz. 17 miles west of Tabora. It is a flat, deciduous bush 

 country witli granite kopjes. I told you something about 

 the place before : since my last visit the new green growth 

 lias begun to come in readiness for the rains, and it is veiy 

 pretty ami springlike. I was glad to leave Itigi, where I 

 was not at all justifying my existence and doing nothing to 

 help on the war, and I got very tired of the place and of the 



