REPORT OF THE MALARIA EXPEDITION. 
scrutinized. During our stay, altogether 109 fed female AmpheUi caught within the Wilberforce 
Barracks were examined in this manner. 
It has been stated {^paragraph 7] that Haemamcebida^ of all three human species liad been 
found in about 25 per cent, of the soldiers at Wilberforce. It was therefore to be expected, if the 
Anopheles caught in the barracks were an hospitable species, that the parasites should be found also 
in a large percentage of these insects. And this proved to be the case. Out of the 109 insects 
examined the parasites were detected in 27. 
The parasites were in all stages of growth ; from the very youngest zygotes, evidently 
derived from the last meal made by the host; to the mature zygotes derived from previous meals, 
and the blasts lying in the salivary glands ready to produce fresh infections of human beings. We 
even judged it possible, in some of the dissections, to distinguish the different species of the 
parasites by their morphological characters [paragraph 10]. The following list, giving the serial 
number, and results of examinations of each insect in which the parasites were found (the negative 
insects being omitted) will be instructive : — 
No, 4. Three nearly mature zygotes. Species unknown. 
„ 8. One very small zygote, apparently H. malaria, among stomach cells, 
„ 12, Eight nearly mature zygotes. Species unknown. 
„ 13. Six mature zygotes. Species imknown. 
„ 14. Four very small zygotes, evidently of//, vivax. 
„ 17. Several mature zygotes, one containing melanin, probably of H. vivax. Also 
empty capsules. Salivary glands loaded witii blasts in cells and ducts. 
„ 21. Eleven empty capsules (old) attached to stomach. One half-grown zygote. 
Salivary glands packed with blasts within capsule, cells and ducts. 
,, 23. Eight very small zygotes of H. malaria. 
„ 29. Ten zygotes of //. malaria of 3-4th day. 
„ 31. Several large zygotes. 
„ 32. Empty capsules. Blasts in salivary cells and duct. 
„ 43. Three very young zygotes of //. pracox. 
„ 56. Four young zygotes of H. vivax. 
„ 57. Two young zygotes of H. malaria. 
,, 61. Several very young zygotes of H, pracox. 
„ 62. One medium zygote of H. vivax. 
„ 63. Several nearly mature zygotes, probably H. malaria. 
„ 65. Several smallish zygotes of H. malaria., and one very j'oung one of H. vivax. 
„ 71, Several medium zygotes of H. malaria. 
„ 76. One empty capsule. A few blasts in one lobe of gland. 
„ 79. One medium zygote with dark pigment, 
„ 84, Three mature zygotes. 
„ 89. One empty capsule. No blasts found (poor dissection). 
„ 91. Six mature zygotes. 
