488 THE FERTILISATION OF FLOWERS. [parr 111. 
adheres readily to them. As the anthers dehisce more widely and 
permit the pollen to escape, the style elongates and extends be- 
yond the shorter anthers, often bringing the stigmas in contact 
with the pollen; finally it protrudes far beyond the anthers, and 
in this position is always touched before the anthers by an insect- 
visitor ; probably the pollen brought from another flower and thus 
Fic. 164.—Stachys Betonica, Benth. 
1.—Flower, in first (male) stage, from the side (x 23). 
2.—Forepart of ditto (x 7). 
3.—Flower in second (feinale) stage (x 24). 
4.—Forepart of ditto (x 7). 
5.—Ovary and nectary (x 7). 
applied outstrips in its action that which is so often applied in the 
previous stage when the stigma is making its way past the anthers. 
A. Hymenoptera—Apide: (1) Bombus agrorum, F. § ? (10—15), ab., s. 
B. Diptera—Syrphide: (2) Volucella bombylans, L. (7—8), ep. (Sld.) ; (3) 
Eristalis horticola, Mgn. (Sld.), c.p. C. Lepidoptera—Sphinges : (4) Zygeena 
loniceree, Esp., s., freq. (Thur. July 12, 1868). Additional visitors (five bees 
and four Lepidoptera) are enumerated in No. 590, III. 
Sideritis romana, L.—The reproductive organs are inclosed 
within the tubular flower; the style is very short; the longer 
stamens are of the usual form; each of the shorter stamens bears 
a semicircular connective which has at one end a perfect, and at 
the other a rudimentary, anther-lobe. The two connectives form 
together a complete circle, through which an insect must thrust its 
