sk 
partim.] | THE MECHANISMS OF FLOWERS. 385 
~ Anthophora pilipes, F. 9? ¢ (19—21), sucking normally and c.p., very ab. ; (9) 
Andrena Gwynana, K. 2 (2%), c.p. on the short-styled form, ab. It holds the 
_ anthers in the mouth of the flower with its forefeet, bites the pollen loose with 
_ its mandibles and sweeps it with the tarsal brushes of the midlegs into the 
 eollecting-hairs of the hindlegs. It visits the long-styled form also, but flies 
_ away immediately ; not, however, without performing cross-fertilisation in the 
momentary visit. I have never seen a pollen-collecting humble-bee alight on 
a long-styled flower ; it seems to recognise them at some distance and to avoid 
them, B. Diptera—Bombylide: (10) Bombylius discolor, Mgn. (11--12), 
 s,, ab. ; (11) B, major, L. (10), much less freq., probably in most cases unable 
fo reach the honey. C. Coleoptera—Staphylinide : (12) Omalium florale, Pk., 
ab., creeping about in the flowers. See also No. 590, III. 
Fig. 126.—I rimula integrifolia, L, 
A.—Short-styled, B.—Long-styled plant (nat. size). 
C.—Short-styled, D.—Long-styled flower in section (nat. size). 
E.—Stigmatic papille of short-styled flower. 
F. G.— Ditto of long-styled flower. 
H.—Stigma of short-styled flower, I.—Ditto of long-styled flower (x 7). 
K.—Moistened pollen of short-styled flower, L.—Dittv of long-styled flower. 
_ Primula officinalis, Jacq, (P. veris, L.), the Cowslip.—The 
tructure of the flower resembles that of P. elatior ; the visitors 
include humble-bees and Anthophora pilipes (509, I11.). 
The handsome red Alpine species, Primula integrifolia, L., 
, Jacq., farinosa, L., viscosa, All., minima, L., longiflora, All., 
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