414 THE FERTILISATION OF FLOWERS. [PART III. 
Bombylide : (13) Andrena Gwynana, K. 9, «ep. ; (14) Anthophora retusa, 
K. 9, cp. and s.; (15) Halictus cylindricus, F. 9, cp. ; (16) Bombylius 
discolor, Mgn. (11—12), hovers over the flower and inserts its proboscis with- 
out settling, ab., but only in warm sunshine; (17) B. major, L. (10), do.; 
(6) Syrphide : (18) Rhingia rostrata, L. (11—12), very ab., s., but only towards 
the end of the flowering period (May 18, 1870). C. Lepidoptera—Rhopalocera : 
(19) Rhodocera rhamni, L., s.,ab. D. Coleoptera—Staphylinide : (20) Omalium 
florale, Pk., ab., creeping about in the flowers. 
305. MyosoTis sItvaticA (Hoffm.) Lehm.—As soon as the 
flower opens, the anthers, which are attached to the corolla above 
the level of the stigma and are inclined slightly inwards, dehisce 
Fic, 138.—Myosotis silvatica, Hoffm, 
1.—Flower, from above. 
2.—-Ditto, in section (x 7). 
83.—Pollen grains. 
a, light-blue limb of corolla ; b, white radiating bands ; c, yellow centre of the corolla; d, stamen ; 
é, stigma; f, nectary. 
longitudinally, and become covered on their inner surfaces with 
small, white pollen-grains; each of the latter is shaped like two 
attached spheres, and measures ‘005 mm. by ‘003mm. The stigma 
ripens simultaneously with the anthers. In sunny weather nume- 
rous flies frequent the flowers, which are rendered conspicuous by 
colour and by aggregation. The fly thrusts its proboscis rapidly 
into the flower, spending at most two to three seconds upon it, 
and probably, therefore, sucking honey in each case, not gathering 
pollen. 
The honey is secreted by the fleshy base of the ovary, and is 
lodged in the lower part of the tube of the corolla, which is 2 to 
3 mm. long. An insect must dip its proboscis down between 
the stigma and anthers, and touch them with opposite sides of the 
