MORPHOLOGY OF THE BRAIN AND SUBOESOPHAGEAL GANGLION OF THE ADULT MALE OF CHORISTONE URA FUMIFERANA (CLEMENS) (LEPIDOPTERA: TORTRICIDAE)

Abstract

The neuromorphology of the brain and suboesophageal ganglion (SOG) of the adult male spruce budworm, Choristoneura fumiferana (Clemens), is described and compared with information in the existing literature on adult Lepidoptera. The brain, SOG, and connecting nerves are illustrated. Protocerebral nerves include two pairs to the corpora cardiaca as well as optic nerves and ocellar pedicels. One pair of antennal nerves innervate the deuto-cerebrum and the tritocerebrum is innervated by one pair of labrofontalis nerves. Five pairs of nerves arise from the SOG: the mandibular, maxillary, labial, and two pairs of cervical nerves.