The distribution of progeny by Microbracon hebetor among larvae of Ephestia kiihniella is investigated by presenting the data in the form of frequency distributions. It is shown that the female parasite tends to distribute her eggs in accordance with the relationship between size of host and development of progeny.
While working in the South African Museum during 1943-4, I was shown a box containing a collection of ""foreign Orthoptera"" by Dr Hesse. These proved to be from North and East Africa, Australasia, America, Asia, and other parts of the world. It occurred to me that it might be useful to indentify the African specimens and to place a list of them on record for reference purposes. The origin of this collection appears to be a mystery. As regards the North and East Mrican material, I decided to attempt to identify the specimens and then refer to the specific labels which some of them carried. There is nothing to indicate by whom these labels were written. In all cases except one they have proved to be correct, excepting that some of the species are now placed in different genera from those to which they were assigned by the unknown determinor.
Different views regarding the relative attractiveness of grain products to insects have been expressed.The problem of susceptibility of the different milling products of maize and wheat to invasion and oviposition by the rust-red flour beetle has been investigated. Results on the relative rate of development of the larvae of this species in maize and wheaten products are given below.