THE CANADIAN ENTOMOLOGIST. . 189 



Ductus ejaculatorius or Vesica. — A membraneous tube, passing through 

 Penis, and sometimes seen protruding from its distal end, forming a 

 sort of cap. 



Saccus. — A medio-ventral chitinous sac projecting forwards into the 

 abdomen and attached to the anterior margin of XII segment. 



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Gosse, Ph. H — On the clasping organs ancillary to generation in certain 

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Haan, W. de. — Bijdragen tot de Kennis der Papilionidea. Leyden 1842. 



Hoffman, 0. — Beitrage zur Kenntniss der Butaliden. Stett. Ent. Zeit. 

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Peytoureau, S. A. — Contributions a I'teude de la morphologie de I'armure 

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