CORN ACE A E 



5'9 



self-pollination. Hermann Miiller stales that automatic geitonogam}' may now and 

 then take place, for some of the stigmas are touched by the anthers of the diverging 

 stamens of neighbouring flowers. {€/. ' Nat. Hist. PI.,' Eng. Ed. i, II, pp. 325-6.) 

 The flowers possess the odour of trimethylamide. Warnstorf describes tlje pollen- 

 grains, when examined in water, as large, rounded, opaque, with granular proto- 

 plasm, 63 to 75 /A in diameter. 



Visitors.— The following were recorded by the observers, and for the localities 

 stated. — 



Knuth (Kiel), several skg. or po-dvg. hover-flies (i. Eristalis tenax Z. ; 2. E. 

 arbustorum Z. ; 3. Syrphus balteatus Z>f^. ; 4. Volucella pellucens Z.) and Muscids 

 (i. Lucilia caesarZ. ; 2. L. cornicina F.): (Riigen), the butterfly Argynnis paphia Z., 

 skg. for a short time. Krieger (Leipzig), the true wasp Odynerus spinipes Z., and the 

 bee Andrena labiata Schenck (=A. schencki Mor.). Schmiedeknecht (Nassau), 

 the bee Andrena carbonaria Z. von Dalla Torre (Tyrol), the bee Andrena albicans 

 Mull. 5. MacLeod (Flanders), an Empis, and the beetle Meligethes (Bol. Jaarb. 

 Dodonaea, Ghent, vi, 1894, p. 256). 



Herm. Miiller (H. M.) and Buddeberg (Budd.) give the following list.— 



A. Coleoptera. {a) Ctrambycidae: i. Clytus arietis Z. (Budd.); 2. Grammo- 

 ptera tabacicolor De:^. (H. M.); 3. Leptura livida F. (H. INI.); 4. Pachyta octomacu- 

 lata F. (Budd.); 5. Strangalia armata Hbst. (H. M., Budd.); 6. S. atra Laich. (H.M.) ; 

 7. S. attenuata Z. (H. M.). {b) Curculwnidae : 8. Odorhynchus picipes F. (H. M.). 

 {c) Dermestidae : 9. Byturus fumatus Zl (H.M.) (d) FJateridae: 10. Athous niger 

 Z. (H. M.); II. Dolopius marginatus Z. (H. M.). (f) Tchphoridae : 12. Telephorus 

 pellucidus F. (H. M.). 

 ( /) Nitidulidae : 13. ,^ 



Meligethes (H. M.); 



14. Thalycra sericea 

 Sturm. (H. M.). B. 

 Diptera. (a) Evipidae: 



15. Empis livida Z. 

 (H. M.). (h) (?). 16. 

 A tiny gnat in very 

 large numbers (H. M.). 

 (c) Syrphidae : 17. 

 Eristalis arbustorum 

 Z., po-cltg. (H. M.) ; 

 18. E. nemorum Z., 

 po-cltg. (H. M.) ; 19. 

 Volucella pellucens 7,. 

 (Budd.). C. Hyme- 

 noptera. Sphegidae : 

 20. Pompilus sp. (H. M.). All these visitors were licking the fleshy disk. 



Fig. 16S. Cornns smiguinea^ L. (after Herm. MUllerj. (ij Flov\er 

 seen from above. (2) Do., from the side. ^, stamen; ;/, nectary: ov, 

 ovary ; /*, petal ; J, sepal ; J/, stigma. 



1204. C. Mas L. (Sprengel, ' Entd. Geh.,' p. 85 ; Schulz, ' Beitrage,' II, p. 191.) 

 ^Schulz says that the yellow flowers of this species are hermaphrodite and homoga- 

 mous ; but they have also been described as dioecious, or polygamous. The 

 mechanism of the hermaphrodite flowers agrees with that of C. sanguinea. Accord- 

 ing to Kerner (loc. cit.), geitonogamy may also take place as in that species. 

 Warnstorf describes the pollen-grains as pale-yellow in colour, ellipsoidal to ovoid, 

 almost smooth, 37 ^ long and 23-25 ^x broad. 



