nPalpiger(Zoöl) That portion of the labium which bears the palpi in insects.
Century Dictionary and Cyclopedia
npalpigerIn entomology, a lateral appendage of the labium of some insects, situated between the mentum and the ligula, and bearing the labial palpus. In so far as it is basal, it represents the cardo of the maxilla; in so far as it bears a palpus, it represents the maxillary stipes, or palpifer. The suture between the mentum and its attached palpiger is often obsolete. The name was first applied by Newman to a section of the part called lingua by Kirby and labium by McLeay and others. See cuts under Insecta and mouth-part.
Webster's Revised Unabridged Dictionary
Lacinia exteriores and interiores: in Apidae, the palpiger and paraglossa often used for the gales and lacinia of maxilla.
"Explanation of Terms Used in Entomology" by John. B. Smith