Anatomy of the Male Genital Tube in Coleoptera. 481 



remarks by a quotation from the same chapter of this 

 immortal author. He says, "A magnificent temple is a 

 laudable monument of national taste and religion, and the 

 enthusiast who entered the dome of St. Sophia might be 

 tempted to suppose that it was the residence, or even the 

 workmanship of the Deity. Yet how dull is the artifice, 

 how insignificant is the labour, if it be compared with the 

 formation of the vilest insect that crawls upon the surface 

 of the temple ! " — Gibbon, " Decline and Fall of the Roman 

 Empire," chap. xl. 



II. ORISMOLOGY AND TECHNIQUE. 



The following is a list of some of the terms we have 

 applied to parts of the male genital tube, and we add a few 

 synonyms used by other writers. The letters in brackets 

 are those made use of in the plates. 



This section is concluded by some critical remarks. 



Aedeagus. The median lobe and tegmen together. It is 

 the Edeagophore of Blaisdell. 



Azygos, or the azygotic portion of the male genital tube. 

 It comprises all the unpaired portion of the tube from 

 the body wall to the divergence of the seminal ducts, 

 where the zygotic portion, or efferent ducts, ends 

 {h-cl and 5-1, fig. 239). 



Basal-piece (hp). The basal part of the tegmen. It is 

 the " basale " (Blaisdell) ; external lobes (Packard) ; 

 basalplatte (Verhoeff ) ; tambour (Straus-Durckheim). 



Ejaculatory duct {ej) or stenazygos is the slender 

 portion of the genital tube from the seminal ducts 

 to the internal sac or eurazygos, 



Eurazygos {c-d and 5-1, fig. 239). The enlarged portion 

 of the genital tube. 



First connecting membrane {{cm\). The membrane 

 connecting the median lobe to the tegmen. 



Internal sac {is). The enlarged portion of the azygos 

 which is more or less evaginated during copulation. 

 It is the sac interne (Jeannel) ; praeputialsack (Ver- 

 hoeff), and forms part of the ejaculatory duct of most 

 writers. 



Lateral lobes {U). The distal portion of the tegmen. 

 In the generalised trilobe type they form two free 

 processes lateral of the median lobe and often en- 



