Seen emerging from behind its left compound eye, under a low magnification of 36X, this scanning electron micrograph (SEM) depicted the mid-region of this unidentified hornet's left antenna. Found in the suburbs of Decatur, Georgia, this antenna was one of a pair, which along with other sensorial structures such as the hair-like 'setae', seen here coating the antenna's surface, and the surface of insect's head, provided the hornet with data indicative of changes encountered in its environment such as chemical, thermal, and tactile queues.The antenna is composed of three main regions: scape, pedicle, and flagellum. The scape, which is not visible in this view, attaches the sensory organ to the head region, and the pedicle, also not visible, joins the distal, jointed, multisegmented flagellum to the scape.
CDC/ Janice Haney Carr
November 26, 2012