232 THE FERTILISATION OF FLOWERS. [PART III. 
crus, K. ¢,s.; (10) A. parvula, K. 9,s.; (11) A. dorsata, K. 9,¢p.; (12) 
A. chrysosceles, Nyl. 9, s.; (13) Nomada ruficornis, L. ¢ ; (14) Osmia 
fusca, Christ. (bicolor, Schrank), 9, s. and c.p.; (15) Apis mellifica, L. §, s. 
B. Diptera—(a) Stratiomyide : (16) Odontomyia argentata, F., s. ; (b) Syr- 
phide : (17) Syritta pipiens, L., s.; (18) Syrphus, s.; (19) Rhingia rostrata, 
L., s.; (20) Cheilosia preecox, Zett., ab.,s.; (21) Ch. modesta, Egg.,s.; (ce) 
Muscide: (22) Pollenia vespillo, F.; (23) Onesia cognata, Mgn.; (24) O. 
floralis, R. D.,—all three sucking. C. Coleoptera—Nitidulide : (25) Meligethes, 
licking honey, ab. See also No. 590, 11. 
= FS ZZ, 
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Fia. 75.—Potentilla minima, Haller fil. 
A.—Flower, from above (x 7). 
B.—Ditto, in longitudinal section. 
C.—Upper end of a stamen ; the anther has dehisced laterally (x 35). ; 
a, epicalyx; b, calyx; c, corolla; d, stamen;‘e, yellow fleshy ring on which the stamens are in- 
serted, and which secretes honey; /, internal orange-coloured part of the ring, which becomes 
covered with a layer of honey; g, ring of hairs which protect the honey h, orange spot at the base 
of each petal (pathfinder); ¢, carpel. 
(Heuthai, Berninahaus, August 8, 1877.) 
Potentilla minima, Haller jil—The annexed figure may serve 
as an illustration of a simple, open, regular flower, cross-fertilised 
by a miscellaneous lot of short-lipped insects, which has already 
acquired, besides a nectary, a honey-receptacle, a contrivance to 
shelter the honey, and guides or pathfinders to point towards it. 
140. PoTENTILLA REPTANS, L.—The floral mechanism resem- 
bles that of P. verna, and the fertilising agents in like manner 
are chiefly the less specialised bees, | 
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