alternative definition added almost 15 years ago by Istvan Miko
One of a pair of streaks on the front of the head of some Hymenoptera, slightly differentiated and often pigmented.
Reference: Evans, H. E. 1987. Chapter 27 Order Hymenoptera. Pp. 597-710 in: Immature Insects, vol. 1 (F. W. Stehr, ed.). Kendal/Hunt,Dubuque, Iowa. 754 pp.
Cross reference:
None provided.