256 GEO. H. BISHOP 
Under this treatment, the penis everts throughout its whole 
length, including the bulb at its end (text fig. 2, C); the expanded 
end of the ejaculatory duct is brought through the bulb to form 
a cup-shaped disk at the extremity of the penis (fig. 2, C, c’), 
and from the central perforation of this cup (the ejaculatory 
duct) proceeds first a drop of yellow sperm, then a white mass 
of viscous mucus. The emptied and distorted sexual organs 
(mucous glands and seminal vesicles) are often forced into the 
base of the extruded penis by the violent contraction of the 
abdominal walls (text fig. 2, C, d). The drone is paralyzed or 
stunned, but sometimes recovers enough to crawl about feebly, 
and may live for several hours. 
‘CONCLUSION 
It may be seen, therefore, that several lines of evidence point 
consistently to one specific manner of functioning of the sexual 
mechanism of the drone. First, the anatomical arrangement of 
the parts is such that the seminal vesicle is in more direct com- 
munication with the ejaculatory duct than is the mucous gland, 
and this connection is of such a nature as to suggest definitely 
a separate discharage, and therefore a distinctive separation of 
function, for sperm and mucus (p. 239 and pl. 1, E). Second, 
the arrangement of the musculature is such that its contraction 
brings about exactly that arrangement of ducts and apertures 
which will discharge first sperm, and then mucus, into and 
through the basal pocket of the gland and thence into the ejacu- 
latory duct and penis (p. 243 text fig. 3, and pl. 3, fig. 10). Third, 
the physiological behavior of sperm and mucus is so character- 
istically different as to suggest a difference of function and dis- 
posal (pp. 246 to 247). Fourth, by actual observation, a dis- 
posal of sperm and mucus, entirely consistent with the anatomical 
and physiological findings, is induced by stimuli that may be 
considered closely to simulate, or even actually to duplicate, 
those stimuli that cause the normal reactions of the sexual 
organs. Under suitable conditions, the action of these organs, 
and the passage of the secretions through them in the expected 
order, may be observed under the microscope (p. 250). Finally,. 
