Techniques were developed for using natural membranes to successfully feed a colony of Anopheles albimanus Wiedemann on bovine blood preserved by defibrination and storage at 50C. Egg production by mosquitoes fed the preserved blood was 58% lower than production by those fed on live rabbits, but this reduction was not detrimental to colony maintenance and productivity. The advantages associated with membrane feeding make that technique much more desirable than maintaining live animals for that purpose.