Insecta. 9 1 



it; in fact, in many cases the ? was found to be provided only with an empty 

 cocoon, tlie "prey" having been probably lost. This third and most interesting 

 stage is exemplified by Hilara, the males of which seize the objects — either 

 insects or pieces of vegetable matter — which they bring to the females, t'roin 

 the surface of the water over which they fly. Certain more detailed observations 

 and evidence are added. H. Scott (Cambridge) 



215) Bruce, Sir David; Harvey, Major D.; Hamertou, Major A. E.; and 

 Bruce, Lady, Infectivity of Glossina mors itans in Nyasaland. In: 

 Proc. Royal Soc, Ser. B., Bd. 86, Heft B 589, S. 422—426, 1913. 



The object of this paper is to put on record the proportion of Glossina 

 morsitnns found to be infected with Trypanosoraes in a certain area of Nyasa- 

 land known as the "Sleeping Sickness Area" or "Proclairaed Area"; and also, to 

 identify the species of Trypanosomes with which the flies are infected. The 

 methods of experiment are described, and tables of the results are given. The 

 conclusions arrived at are best given almost verbatim: (I) the flies are infected 

 with four species of disease-producing trypanosomes, T. hrucei (= rhodesiense), 

 T. j^ecorum, T. simiae, and T. caprar. (II) The proportion of infective flies (i. e. 

 flies containing trypanosomes in a stage of development in which they can pro- 

 duce disease) is 13,5 per 1000. (III) The proportion infected with T. hrucei 

 (the cause of Human Trypanosomiasis in Nyasaland) is 2 per 1000. (IV) Flies 

 containing trypanosomes in a stage capable of producing disease are found all 

 the year round. (V) To prevent infection of the flies it is proposed by way of 

 experiment to destroy all the wild ganie in the "Proclaimed Area". 



H. Scott (Cambridge). 



216) Moiser, B., Notes on a few photographs illustrating the haunts 

 and habits of Glossina tachinoides in Bornu, Northern Nigeria. In: 

 Bull. Ent. Research, Bd. 4, Heft 2. S. 145, Taf. 13—17, 1913. 



G. tachinoides appears to be almost the only kind of Tse-tse fly occurring in 

 Bornu. It is confined to quite localised areas, close to rivers and marshes where 

 there is water all the year, and consisting of small patches of dense jungle com- 

 posed of tall shady trees, mostly tamarinds, with a dense undergrowth of thorns 

 and creepers and some ebony trees. It is true that many such localities appear 

 devoid of the flies; but the flies, when found, are found in such places. The possi- 

 bility of the ebony trees being a factor determining the pi-esence of the flies 

 has forced itself on the writer, as the under sides of small horizontal shoots of 

 the ebony trees near the ground are the most frequent natural resting- places 

 of the flies. It may be mentioned also that wart-hogs abound in and around the 

 fly-areas. The author has previously reported on the fact that the complete 

 disappearance of the flies was brought about by Clearing the whole undergrowth 

 in one of these areas, and leaving only the tall trees standing. The plates show 

 living flies in their natural resting position, and views of their habitats. 



H. Scott (Cambridge). 



217) Scott Macfle, J. W., The distribution of Glossina in the Ilorin 

 Province of Northern Nigeria. In: Bull. Ent. Research, Bd. 4, Heft 1, 

 S. 1—28, Taf. 1—7, 1913. 



The foci of sleeping-sickness in Northern Nigeria are at present peculiarly 

 isolated, but with the opening up of the country and increase of intercomniuni- 

 cation there is constant danger of the spread of the disease. It is considered to 

 be endemic in the neighbouring Province of Kabba and might easily spread into 



