Rhodnius prolixus is the principal
The insect was used by Sir
Rhodnius prolixus is also known as the kissing bug because it tends to feed on the area around victims' mouths.
The insect has five larval stages, with a moult between each. Each larval stage consumes a single large meal of blood, which triggers the moulting process, 12–15 days later. Wigglesworth demonstrated that the moult is started by a hormone secreted into the blood by a gland in the brain. Further it was demonstrated that the