Table 1.

Rainfall, periods of sampling, number of traps and number of mosquitoes collected in Masika during the period 1998-2001

Year	1998/1999	1999/2000	2000/2001
Period of mosquito sampling (day/month/year)	1/12/1998 - 30/11/1999	1/12/1999 - 30/11/2000	1/12/2000 - 30/11/2001
Total rainfall for period of mosquito sampling (mm)	1,292	996	815
No. weekdays of mosquito sampling	260	272	257
No. of traps used (mean no. of traps per weekday)	2,204 (8.48)	1,877 (7.16)	1,562 (5.98)
Total no. of collected An. gambiae (average no. per trap)	12,465 (5.66)	4,484 (2.39)	2,125 (1.36)
Total no. of collected An. funestus (average no. per trap)	2,716 (1.23)	2,145 (1.14)	858 (0.55)
Total no. of collected Culex quinquefasciatus (average no. per trap)	3,304 (1.50)	1,648 (0.88)	837 (0.54)

Data collected during the periods 6^th July - 30^th November 1998 are not presented in the table but are included in the statistical analysis.