Laboratory experiments carried out in Jamaica in 1963 showed that the number of eggs matured by blood-fed females of Leptoconops becquaerti (Kieff.) was only slightly increased when they were allowed access to a source of dilute honey during the subsequent period of egg maturation. A majority of the females imbibed some honey, and over half took large amounts; survival was better in groups given honey than in those not. The amount of fluid in the crop of field-collected females indicated that more than half had fed on nectar. In the laboratory, field-collected females took on average more than their own weight of blood.