Dipsa Explained

The fly genus Dipsa is a junior synonym of Lonchoptera.Dipsa is a tiny, mucus-like, extremely venomous snake from Medieval bestiaries. They were so venomous that their victim would die before becoming aware he had been bitten.^{[1] [2]}

References

1. Web site: Dipsa. 2008-12-28. The Medieval Bestiary.
2. Book: Eley, Penny. Partonopeus de Blois. 2011. Boydell & Brewer Ltd. 9781843842743. en.