XIII, B, 1 



Barber: The Transmission of Malaria 



Table I. — Palp ratios of different varieties of A. rossi. Incidence of cases. 



A. EYEPIECE MICROMETER MEASUREMENT. 



Ratio. 



Type 



Giles, 



brackish 



water. 



Type 

 Giles, 

 fresh 

 water. 



Var. in- 



definitus, 



fresh 



water. 



Total. 



Ratio. 



Type 



Giles, 



brackish 



water. 



Type 

 Giles, 

 fresh 

 water. 



Var. in- 



definitus, 



fresh 



water. 



Total. 



0.00 

 0.01 

 0.10 

 0.11 

 0.12 

 0.13 

 0.14 

 0.15 

 0.16 

 0.17 

 0.18 

 0.19 

 0.20 

 0.21 

 0.22 

 0.23 

 0.24 







2 

 1 

 2 

 2 

 1 



2 

 1 

 2 

 2 

 1 

 1 

 8 

 3 

 3 

 4 

 8 

 5 

 6 

 6 

 9 

 4 

 8 



0.25 

 0.26 

 0.27 

 0.28 

 0.29 

 0.80 

 0.31 

 0.32 

 0.33 

 0.34 

 0.35 

 0.36 

 0.37 

 0.38 

 0.40 



Total 



2 

 2 

 3 

 3 

 6 

 10 

 4 

 3 

 7 

 7 

 5 

 5 

 1 

 4 

 3 



4 

 5 

 6 

 1 



4 

 1 



4 

 4 

 4 



1 

 1 



7 

 8 

 9 

 5 

 11 

 11 

 8 

 7 

 11 

 7 

 5 

 5 

 3 

 4 

 4 















1 

 1 













2 

 3 

 2 

 4 



7 

 4 

 6 

 5 

 5 

 1 

 2 



































2 











2 

 1 

 2 



2 

 2 

 4 



1 







70 



49 



53 



172 



1 



B AND C. HAND-LENS MEASUREMENT. 



Ratio. 



B. Same specimens as A. 



C. All specimens, including 

 A and B. 



Type 



Giles, 



brackish 



water. 



Type 

 Giles, 

 fresh 

 water. 



Var. in- 



definitus, 



fresh 



water. 



Total. 



Type 



Giles, 



brackish 



and fresh 



water. 



Var. in- 



definitus, 



fresh 



water. 



Total. 



0.0 



0.1— 



0.1 



0.1+ 



0.2- 



0.2 



0.2+ 



0.3- 



0.3 



0.3+ 



0.4— 



0.4 



0.4+ 



0.5— 



0.5 



Total 







2 



2 





15 



12 



87 



47 



120 



209 



61 



9 



4 



1 



15 



13 



39 



54 



134 



273 



252 



127 



113 



98 



64 



43 



25 



3 



13 







1 



2 



7 



14 



64 



191 



118 



109 



97 



64 



48 



25 



3 



13 







2 

 2 



e 



15 



21 



4 



2 

 2 

 6 

 17 

 83 

 40 

 29 

 26 

 13 









1 

 2 

 8 

 13 

 12 

 7 

 6 





4 

 23 

 17 

 19 



7 















































70 



49 



51 



170 



756 



515 



1,271 



