palpus

[ pal-puhs ]

/ ˈpæl pəs /

an appendage attached to an oral part and serving as an organ of sense in insects, crustaceans, etc.

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1805–15; <New Latin, special use of Latin palpus a stroking, caress, palm of the hand; akin to feel

The mouth-parts in this genus are much as in Tomocerus, the maxillæ ending in a lacinia and palpus.
Our Common Insects|Alpheus Spring Packard
In x-notata (fig. 435) the palpus is as long as the cephalothorax, and the tarsus and palpal organ small and round.
The Common Spiders of the United States|James Henry Emerton
The palpus, too, on this side was turned back to correspond to the direction of the legs nearest it.
Studies in the Psychology of Sex, Volume 3 (of 6)|Havelock Ellis
Near the root or base of the mandibles on each side is a jointed feeler, or palpus; but spiders have no antenn.
An Elementary Text-book of the Microscope|John William Griffith

In montana (fig. 435a) the palpus is still shorter, the tibia thicker, and the tarsus and palpal organ larger.
The Common Spiders of the United States|James Henry Emerton