278 



AN GIOSPERM AE DICOTYLEDON ES 



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. Muller observed the following at Rohmberge, near Muhlberg. 



A. Hymenoptera. Apidae : 1. Andrena denticulata K. 5, skg. ; 2. A. fulvi- 

 crus K. 5, do. ; 3. Apis mellifica L. Jjl, freq., skg. ; 4. Bombus agrorum F. $, skg.; 

 5. Cilissa leporina Pz. $ and J, skg. and po-cltg. ; 6. Halictus quadricinctus F. 5, 

 po-cltg. ; 7. Nomada ferruginata K. 5, skg.; 8. N. solidaginis Pz. J, do.; 9. N. 

 fucata Pz. 5, do. ; 10. Osmia aurulenta Pz. $, freq., skg. and po-cltg. ; 11. Rhophites 

 canus Ev. 5 and S, skg. B. Diptera. (a) Bombyliidae : 12. Systoechus sulphureus 

 Mikan, skg. (t>) Syrphidae: 13. Helophidus trivittatus F. C. Lepidoptera- 





FIG. 90. Medicagofalcata, L. (after Herm. Mailer), (i) Flower seen obliquely from below, (a) The- 

 same, after removal of the calyx and vexillum ; seen from above. (3) Left ala, 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 from above and from the right. The sexual column is much foreshortened (X7). 

 a, calyx ; 6, vexillum ; c, nectar-guides ; d, alar claw ; e, ala ; _/| anterior alar process ; jf, posterior alar 

 process ; h, fused claws of carinal petals ; f, limbs of do. ; k, carinal pit into which an anterior alar process 

 fits ; /, sexual column ; w, upper filament ; , nectar-passage ; o, stigma. 



(a) Noctutdae: 14. Euclidia glyphica Z., skg. (b) Rhopalocera-. 15. Epinephele- 

 janira Z., skg. ; 16. Hesperia sylvanus Esp. t do.; 17. Lycaena coridon Poda, skg. ; 

 18. Melitaea athalia Rott., do. ; 19. Pieris rapae Z., do. ; 20. Vanessa urticae Z., do.; 

 (c) Sphingidae'. 21. Sesia asiliformis Rott., skg. ; 22. Zygaena carniolica Scop., freq. 

 Herm. Muller also saw a humble-bee and two Lepidoptera in the Alps ('Alpen- 

 blumen,' p. 248). 



Rossler noticed the butterfly Colias hyale Z. at Wiesbaden, as an unbidden 

 guest. 



Burkill observed the following at Cambridge (Proc. Phil. Soc, Cambridge, 

 viii, 1894). 



A. Diptera. Syrphidae: 1. Syritta pipiensZ. ; 2. Syrphus balteatus Beg. ; 3. Ss 

 luniger Mg. B. Hymenoptera. (a) Apidae : 4. Apis mellifica Z. 5 ; 5. Bombus 



