DOMESTIC MOSQUITOS OF NIGERIA. 



329 



Table II. — Mosquitos Caught in Daily Examination of M.O.'s Bungalow at Katagum 



in 1916. 



Weekly Totals. 







October November 



Total 

 for 



Seven 

 Weeks. 





Species. . 



From 



6 13 



20 



27 



1 



9 



16 



Percentages. 





To 



i 

 12J 19 



26 31 



8 



15 



22 





Anopheles — 

 A. costalis 



A. funestus 



A. rufipes 



A. pharoensis 



A. mauriUanus 



A. squamosus 



A. flavicosta 



Sex 

 M 



$ 

 <3 

 $ 



3 



$ 

 cf 



? 

 <? 

 ? 

 <s 

 ? 



3 



? 



96 



132 



45 



Id.-, 



8 



10 



47 

 59 

 53 

 71 

 11 

 10 



2 



46 

 92 

 56 

 100 

 17 

 32 



10 



2 



33 

 192 



52 

 703 



19 



20 



14 

 1 



3 

 163 



6 

 915 



7 

 9 



7 

 2 



4 



37 



10 



177 



7 

 9 



3 



25 

 73 

 84 

 280 

 34 

 93 



ii 



2 



1 



Ss} 1002 



2 3 351}S657 



42 } 42 



- 5 }5 



~ 12 



2) 



25 '1 %of total Anopheles 

 66-5% „ „ 



7-2% „ „ 



1-1%,, „ 



0-1% „ „ 

 0-05% „ „ 

 0'02% „ „ 



Stegomyia Group 

 Steg. fasoiata 



Ochlerotatus ochraceus 



$ 

 5 



2 





- 



- 



1 



- 



1 



- 



"J' 





Culex Group 

 Culex decens 



Culex grahami 



Mansonioides uniformis 



O 



9 



-A 



o 



? 



c? 

 ? 



1 

 2 

 1 



2 



- 



1 



- 



5 



1 



To) 10 





Total Anopheles 

 Total Steqomyia Group 

 Total Culex Group 





396 



4 



253 

 2 



355 



1034 

 1 

 1 



1112 



247 



1 

 5 



598 

 1 



3995 



2 



13 



99 -6 % of total Mosquitos 

 0-05% „ „ 



Rainfall at Katagum for 1916=21-15 ins. 



Total mosquitos examined in seven weeks =4,010, of which 99-6% were Anopheles. 



Relation of males to females : — Anopheles <J 663, $ 3,332 ; i.e., cj : $ : : 1 : 5. 



