STRUCTURE OF PROBOSCIS OF OPHIDERES FULLONICA, 389 
Newport nor Kirby and Spencey’give clear descriptions or 
figures of any such locking mechanism, and in Catocala it is 
very slightly developed. It is remarkable that, owing to the 
development of the processes (A h), the proboscis ceases to 
be, strictly speaking, a bilaterally symmetrical organ. 
