10 



The Philippine Journal of Science 



191S 



Table II. — Anophelines infected in the laboratory. Controlled series. All 



dissections. 



Species of Anopheles. 



Cages. 







Mid-gut. 







Dis- 

 sected. 



Infected. 



Number 



with 



sporo- 



zoites. 



Average 

 zygotes 

 per posi- 

 tive mid- 

 gut. 



A. ludlouri 



20 

 28 



6 



3 

 7 



19 



9 



69 

 129 



85 



42 

 113 



169 



160 



42 

 31 



S 



2 

 37 



45 



25 



Percent. 

 60.9 

 24.0 



9.4 



4.8 

 32.7 



28.3 



ir.6 



2 



1 



•1 





 4 



16 



4 



19.0 

 12.1 



3.3 



2.0 

 b6.6 



9.6 



8.3 



A. rossi var. indefinitus, coast 



A. rossi var. indefinitus, inland 

 "known" 



A. rossi var. indefinitus, inland 

 "probable" 



A. rossi type Giles, inland "known". 

 A. rossi type GileB, inland "proba- 

 ble" 



A. rossi type Giles, indefinitus, in- 

 land mixed 



Total all rossi 



72 



668 



148 



2]. 6 



26 



7.9 



A. kochi 



11 

 4 

 5 

 4 

 4 



21 

 4 



10 

 6- 



20 



6 



9 



10 



14 



143 



8 



107 



29 



9 

 4 

 3 

 7 

 10 

 26 

 1 

 3 

 1 



45.0 

 66.7 

 33.3 

 70.0 

 71.4 

 17.6 

 12.6 

 2.8 

 3.4 





 1 

 1 

 

 1 

 d6 

 

 1 

 



c26.2 

 34.6 

 4.0 

 6.3 

 6.2 

 3.6 

 1.0 

 7.0 

 3.0 



A. aconitus . 



A. fuliginosus 



A. mandatus.. _ . 



A. kawari _. . 



A. umbrosus 



A. hvnteri 



I" A. barbirostris 



A. sinensis . 



Total 



•108 



1,103 



253 



22.9 



37 



10.6 





COMPARATIVE SI 



:ries. i] 



S'CLUDE 



IN TB 



E ABOV 



E. 





| 



1 A. rossi type indefinitus 



6 

 6 



73 

 94 



8 

 35 



11.0 

 37.2 



bl 



3 



8.3 

 6.9 



A. rossi type Giles 



Total 





167 



43 



25.6 





6.5 









a Sporozoites apparently abnormal. 



'' One "very many" counted as 50. 



c Two "very many" counted as 50 each. 



11 In three cases possibly infected before exposure to gamete carrier. 



' Subtracting those counted twice. 



