Mean number (±SE) of outdoor-biting Anopheles gambiae s.l. (panel A) and Anopheles funestus (panel B) mosquitoes of different abdominal conditions (unfed, blood-fed and gravid). The mosquitoes were collected overnight in a MM-X trap without odour, baited with the Mbita blend (MB) augmented with carbon dioxide released from 250 g refined sugar, 250 g or 500 g molasses for 20 nights. Treatments are shown in the legend of panel A. Mean values within the same mosquito type with different letters are significantly (P <0.05) different.