FERTILIZATION IN THE HONEY-BEE PFA 
A. Dorsal aspect, diagrammatical optical section of female genital tract. 
The spermatheca is shown rolled over to one side of its normal position immedi- 
ately dorsal to the anterior portion of the vagina, and therefore presents a lateral 
view. Drawn as if everything dorsal to the genital tract were dissected away, 
and the lumen of this laid open. 
B. Lateral aspect, profile of genital tract, drawn as above. 
C. Uneverted bulb of penis and adjoining regions. Comparison of the size 
of this organ with the dimensions of the female genital tract casts some doubt 
upon the assumption that this organ everts into the vaginal tract, g. The only 
part comparable in size to this region is the extreme tip of the everted organ 
(fig. 2, C, c’), formed by the eversion of the ejaculatory duct beyond the penis 
bulb; while the bulb itself would scarcely be completely contained in the much 
larger bursa. 
D. Egg drawn to same scale as genital tract. 
Fig. 2 Diagrams of drone’s organs, showing uneverted, partially everted? 
and completely everted relationships of the various portions, in A, B, and ©’ 
respectively. a, posterior or proximal tubular portion of the penis with modifi- 
cations for facilitating copulation, e, f, g; b, bulb portion of penis with lateral 
chitinous plates shown in black; c’, proximal end of ejaculatory duct c, expanded 
where it joins the bulb of the penis; d, the mucous glands. For further expla- 
nations see text. 
