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. 
AzyYGOS, 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 
(b-d and 5-1, fig. 239). 
BASAL-PIECE (bp). The basal part of the tegmen. It is 
the “basale” (Blaisdell); external lobes (Packard) ; 
basalplatte (Verhoeff); tambour (Straus-Durckheim). 
EJACULATORY DUCT (¢) or stenazygos is the slender 
portion of the genital tube from the seminal ducts 
to the internal sac or eurazygos. 
EuRAZzyGos (c-d and 5-1, fig. 239). The enlarged portion 
of the genital tube. 
FIRST CONNECTING MEMBRANE ((cml). 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 (/l). The distal portion of the tegmen. 
In the generalised trilobe type they form two free 
processes lateral of the median lobe and often en- 
