12
SUPPLEMENT TO THE ANNUAL REPORT OF THE
| Males. | Females. | Total. | |
| Malaria carrying anophelines—total | 134 | 540 | 674 |
| A. Culicifacies | 82 | 297 | 379 |
| A. Stephensi | 38 | 166 | 204 |
| A. Listoni | 14 | 77 | 91 |
The great preponderance of anophelines is shown by the fact that they form
88 per cent of the whole catch. Further the large majority of the anophelines
caught were females of malaria carrying species. Thus of 969 adult mosquitoes
caught 540 or more than half were female anophelines capable of carrying
malaria. This fact is of the very greatest significance in estimating the factors at
work, for while "clouds" of mosquitoes exist in several places, in but few would
the proportion of malaria carriers be so high. At the last visit only 7 malaria-
carrying adult anophelines were caught and this was one of the reasons that
necessitated a second visit. The difference between 7 and 674 is a striking
commentary on the effect of season in the production of malaria.
| TABLE XIX.—Malaria-carrying anophelines and areas where caught. | ||||||||||
| Female culicifacies. |
Female stephensi. |
Female listoni. |
Total corre- sponding males caught. |
Total female anopheli- nes caught. |
Total females found infected. |
Infection rate for the three species. |
||||
| Number caught. |
Found Infected. |
Number caught. |
Found Infected |
Number caught. |
Fount Infected. |
|||||
| GROUP A. | PER CENT. | |||||||||
| Mopad | 43 | 4 | 15 | 2 | 10 | ... | 21 | 68 | 6 | 8.8 |
| Kattakendipalli | 20 | 2 | 16 | 1 | 8 | ... | 6 | 44 | 3 | 6.8 |
| Botlagudur | 50 | 3 | 32 | 1 | 15 | 1 | 22 | 97 | 5 | 5.1 |
| Appamambapuram | 28 | 3 | 19 | 1 | 9 | 1 | 16 | 56 | 5 | 8.9 |
| Kambaladinne | 79 | 6 | 39 | 3 | 15 | 1 | 23 | 133 | 10 | 7.5 |
| 220 | 18 | 121 | 8 | 57 | 3 | 88 | 398 | 29 | 7.3 | |
| GROUP B. | ||||||||||
| Vakkuvalluripalli | 3 | 1 | 1 | ... | .. | ... | 2 | 4 | 1 | ... |
| Dakkanurmadiga- palaiyam. |
2 | ... | 4 | 1 | 6 | ... | 9 | 12 | 1 | ... |
| Ragunathapuram | 27 | 3 | 20 | 1 | 6 | ... | 11 | 53 | 4 | ... |
| 32 | 4 | 25 | 2 | 12 | ... | 22 | 69 | 6 | 8.6 | |
| GROUP C. | ||||||||||
| Inimerla | 4 | ... | 10 | ... | 2 | ... | 5 | 16 | ... | ... |
| Nutssupoda | ... | ... | ... | ... | ... | ... | ... | ... | ... | Only culicines present. |
| Lakshminarasimhapu- ram. |
10 | ... | 6 | ... | 6 | ... | 9 | 22 | ... | ... |
| 14 | ... | 16 | ... | 8 | ... | 14 | 38 | ... | ... | |
| GROUP D. | ||||||||||
| Pottipalli | 12 | ... | ... | ... | ... | ... | 3 | 12 | ... | ... |
| Iskadamarla | 19 | ... | 4 | ... | ... | ... | 7 | 23 | ... | ... |
| Tsallavaripalli | ... | ... | ... | ... | ... | ... | ... | ... | ... | Only culicines present. |
| 31 | .. | 4 | ... | ... | 10 | 35 | ... | ... | ||
| All groups total caught. |
297 | 22 | 166 | 10 | 77 | 3 | 134 | 540 | 35 | ... |
| All Groups infection rate. |
... | 7.74% | ... | 5.42% | ... | 3.90% | ... | ... | 6.48 | ... |
The chief carriers.—It is seen that the malaria-carrying species were culici-
facies, stephensi and listoni and that culicifacies was not only the most abundant
species forming a little more than half the total for the three species, but that it
was also the most heavily infected 7.74 per cent as against 5.42 per cent and