alternative definition added about 15 years ago by Andy Deans
The appendages of the head used for feeding, including the labrum, hypopharynx, mandibles, maxillae, and labium.
Reference: Goulet, H., and J. T. Huber. 1993. Hymenoptera of the World: An Identification Guide to Families. Research Branch, Agriculture Canada Publication 1894/E., Ottawa, ON 668 pp.
Cross reference:
None provided.