Abstract
The brain of Othreis materna (L.) (Lepidoptera: Noctuidae), a moth of great economic importance, consists of 3 neuropiles: protocerebrum, deutocerebrum, and tritocerebrum. The protocerebrum bears the optic and protocerebral lobes, the deutocerebrum the antennal lobes, while the tritocerebrum gives off nerves to the frontal ganglion and the labrum. Four pairs of nerves arise from the subesophageal ganglion which is attached ventrocaudally to the brain. The thorax contains the prothoracic and pterothoracic ganglia. Nerves from the former innervate the forelegs, while the latter gives off branches to middle and hind legs and to hind wings. The forewings are innervated by the 1st median nerve arising from the interganglionic thoracic connective. The ventral nerve consists of 4 ganglia in the abdomen. The terminal ganglion gives off a pair of large trunks which supply nerves to the external genitalia and its associated muscles.
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