“…These muscles are responsible for the generation of negative pressures during blood feeding, thus allowing blood to enter their digestive system. These techniques have been used in the past to study blood feeding in several groups of arthropods such as aphids (McLean and Kinsey, 1964), mosquitoes (Choumet et al, 2012;Griffiths and Gordon, 1952;Kashin and Wakely, 1965), tsetse flies (Margalit et al, 1972), cimicids (Araujo et al, 2009a), triatomines (Smith and Friend, 1970;Soares et al, 2014Soares et al, , 2006 and ixodid ticks (Bockenstedt et al, 2014;Gregson, 1969;Richter et al, 2013;Sweatman and Gregson, 1970;Tatchell et al, 1971;Waladde et al, 1979). Although they have been used for insects and ixodid ticks, there is an obvious lack of information for argasid ticks, as few studies have focused on the physiology of their feeding process.…”