356 ANGIOSPERMAEDICOTYLEDONES 



that the stamens are crowded together between them and the carpels, and hence 

 a nectar-seeking insect can only insert its proboscis into the receptacle. This 

 mostly results in cross-pollination, for the styles are generally made use of as an 

 alighting-place. Automatic self-pollination regularly takes place, for some of the 

 stigmas always come into contact with the anthers. 



Visitors. I saw the following in the island of Riigen : all freq., skg. 



A. Diptera. (a) Muscidae: i. Lucilia caesar Z. ; 2. Scatophaga merdaria L. . 

 (b) Syrphidae : 3. Eristalis arbustorum Z. ; 4. E. pertinax Scop. ; 5. E. sepulcralis, Z.; j 

 6. E. tenaxZ. ; 7. Helophilus floreus Z. $; 8. Syritta pipiens Z. B. Hymeno- 

 ptera. Apidae: 9. Bombus lapidarius Z. ; 10. B. terrester Z. j and $. C. Lepi- 

 doptera. Rhopalocera : 11. Pieris sp. 



Alfken observed the following at Bremen. 



A. Coleoptera. (a) Trixagidae: 1. Trixagus fumatus F., freq. (b) Ceram- 

 bycidae: 2. Strangalia nigra Z., very common. B. Diptera. (a) Empidac: 3. j 

 Empis tessellata F., very common. (b) Syrphidae. 4. Ascia podagrica F. ; 

 5. Syrphus ribesii Z. C. Hymenoptera. (a) Apidae: 6. Andrena albicans 

 Miill. 9 ; 7. A. albicrus K. 9 ; 8. A. fucata Sm. 9, freq., skg., po-cltg. ; 9. A. fulvida 

 Schenck 9, rare, skg. and po-cltg.; 10. A. nigroaenea K. 9; n. A. parvula A', 9; 

 12. Apis mellifica Z. ; 13. Bombus agrorum F. 9 and $ ; 14- B. derhamellus K. 9, 

 skg. and po-cltg.; 15. B. hortorum Z. $f skg.; 16. B. jonellus K. 5, do.; 17. B 

 lapidarius Z. 9, po-cltg. and skg. ; 18. B. lucorum Z. 9 and >' 19. B. muscorum F., 

 skg. and po-cltg.; 20. B. pratorum Z. J and S, do. ; 21. B. proteus Gerst. 9 and $j, 

 po-cltg., % skg.; 22. B. sylvarum Z. 9; 23. B. terrester Z. 5, skg. and po-cltg.; 

 24. Coelioxys quadridentata Z. S, skg. ; 25. C. elongata Z<r/>. J ; 26. C. rufescens 

 Lep. t, skg. ; 27. Eriades florisomnis Z. 5 and $ ; 28. E. truncorum Z. S; 29. Halictu? 

 calceatus Scop. $; 30. H. leucopus K. $ ; 31. H. levis K. 5; 32. H. minutus K. 5; 

 33. H. punctulatus K. 5 ; 34. H. quadrinotatulus Schenck 5; 35. H. tumulorum Z. j: 

 36. Megachile centuncularis Z. $; 37. Prosopis communis Nyl. $ ; 38. P. confusa 

 Nyl- ? ; 39- Psithyrus rupestris F. $, skg. {b) Ichneumonidac : 40. Mesostenus 

 ligator Gr., skg. (f) Vespidae: 41. Odynerus antilope 7*2. S; 42. O. parietum Z. 

 5 and $ ; 43. Vespa sylvestris Scop. j. 



Schenck (Nassau) saw 2 bees (Andrena fucata Sm., and A. varians K.) anc 

 a wasp (Vespa norwegica F., one 5). 



Handlirsch records the fossorial wasp Gorytes mystaceus Z. 



von Fricken noticed the following Coleoptera in Westphalia and East Prussia. 



(o) Nilidulidae : 1. Cychramus luteus Oliv. (6) Byturidae: 2. Byturus fumatus 

 F., very freq. (c) Malacodermata : 3. Dasytes niger Z., not rare, (d) Curculionidat 

 4. Anthonomus rubi Hbst., freq. 



Herm. Milller observed the following in Westphalia. 



A. Coleoptera. (a) Cerambycidae : 1 . Pachyta octomaculata F., freq., nect 

 lkg. and dvg. the flowers, (b) Dermestidae : 2. Byturus fumatus Z., dvg. the anther; 

 and nect-lkg. B. Diptera. Syrphidae : 3. Rhingia rostrata Z., skg. and po-dvg. 

 4. Volucella pellucens Z., do. (H. M.). C. Hymenoptera. (a) Apidae: 5. Andrenf 

 albicrus K. S, skg. (H. M.) ; 6. A. nigroaenea K. t, do. ; 7. Apis mellifica Z. g, extremeh 

 common, skg. and po-cltg. ; 8. Bombus agrorum F. 5, freq., skg. ; 9. B. hortorun 

 Z. 9, po-cltg. ; 10. B. pratorum Z. 5 and S, freq., skg. and po-cltg. ; 11. B. muscorun 

 F. j, skg.; 12. B. sylvarum Z. 9, do.; 13. Halictus lucidulus Schenck 9, do 

 (b) Tenthredinidae : 14. Macrophya rustica Z. 



Herm. MUller saw a hover-fly, 7 bees, a wasp, and a Lepidopterid in the Alp 

 (' Alpenblumen/ p. 215). , 



