. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 278 ANGIOSPERMAE—DICOTYLEDONES without causing explosion, for the basal parts of the relatively short and broad alae rest on the carina for some little distance. Visitors.—These are once more bees and Lepidoptera. As a result of the peculiarity last named, the former always effect explosion, while Lepidoptera, owing to the slender character of their proboscis, can extract nectar from unvisited flowers without exploding them. Herm. Miiller observed the follow
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 278 ANGIOSPERMAE—DICOTYLEDONES without causing explosion, for the basal parts of the relatively short and broad alae rest on the carina for some little distance. Visitors.—These are once more bees and Lepidoptera. As a result of the peculiarity last named, the former always effect explosion, while Lepidoptera, owing to the slender character of their proboscis, can extract nectar from unvisited flowers without exploding them. Herm. Miiller observed the following at Rohmberge, near Miihlberg.— A. Hymenoptera. Apidae: i. Andrena denticulata .S". 5, skg.; 2. A. fulvi- crus K. }, do.; 3. Apis meUifica L. 5, freq., skg.; 4. Bombus agrorum F. 5, skg.;. 5. Cilissa leporina Pz. 5 and 5, skg. and po-cltg.; 6. Halictus quadricinctus F. J, po-cltg.; 7. Nomada ferruginata K. 5, skg.; 8. N. solidaginis Pz. J, do.; 9. N. fucata Pz. 5, do.; 10. Osmia aumlenta Pz. §, freq., skg. and po-cltg.; 11. Rhophites canus Ev. 5 and S, skg. B. Diptera. (a) Bombyliidae : 12. Systoechus sulphureus Mikan, skg. (3) Syrphidae: 13. Helophidus trivittatus F. C. Lepidoptera,. Fig. qo. Medicagofalcata^ L. (after Herm. Miiller). (i) Flower seen obliquely from below. (2) The same, after removal of the calyx and vexillum ; seen from above. (3) Left aJa, seen from above and from the right. (4) Carina, seen from above and from the right. (5) Exploded flower, after removal of the vexillum; seen trom above and from the right. The sexual column is much foreshortened (x 7). (2, calyx; b, vexillum ; c, nectar-guides ; d, alar claw ; e, ala ; f, anterior alar process ; j^, posterior alar process ; A, fused claws of carinal petals; /, limbs of do.; k^ carinal pit into which an anterior alar process fits; /, sexual column : wz, upper filament; w, nectar-passage ; (», stigina. (a) Noctuidae: 14. Euclidia glyphica Z., skg. (p) Rhopalocera: 15. Epinephele janira L., skg
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