SAXIFRAGEAE 421 



and blocked by stiff hairs projecting perpendicularly from the style. The anthers 

 at first project somewhat beyond the stigmas, but ultimately stand at the same level, 

 so that automatic self-pollination must take place in horizontal or oblique flowers, 

 though cross-pollination is favoured during insect-visits. After fertilization, the sepals 

 curve upwards. 



Besides hermaphrodite flowers, Kirchner noticed shrubs bearing female ones. 

 The stamens of these are so short that their anthers (which do not dehisce) are 

 at the level of the petals, or may even be situated more deeply in the receptacle. 



Visitors. Herm. Muller (H. M.), Buddeberg (Budd.), and myself (Kn.) 

 observed the following. 



A. Diptera. (a) Muscidae: 1. Calliphora erythrocephala Mg., skg. (H. M.); 



2. Sarcophaga carnaria Z., do. (Kn.); 3. Scatophaga stercoraria Z., do. (H. M.). 

 (&) Syrphidae : 4. Eristalis aeneus Z., skg. and po-dvg. (H. M.) ; 5. E. tenax Z., do. 

 (H. M., Kn.) ; 6. Syrphus ribesii Z., po-dvg. (Kn.). B. Hymenoptera. Apidae : 

 7. Andrena albicans Miill. $ and 5, skg. and po-dvg. (H. M., Budd.); 8. A. fasciata 

 Wesm. S, skg. (Budd.); 9. A. fulva Schr. 5, skg. and po-dvg. (H. M., Budd.); 10. A. 

 gwynana K. J and 5 (H. M.); 11. A. nigroaenea K. J, skg. (Budd.); 12. A. nitida 

 Fonrc. $, do. (H. M.); 13. A. parvula K. 5, po-cltg. (Budd., Kn.); 14. A. smithella 

 K. 5, skg. (Budd.) ; 15. Apis mellifica Z. ijf, do. (H. M., Kn.) ; 16. Bombus pratorum 

 Z. $ (H. M.); 17. B. scrimshiranus K. j (H. M.); 18. B. terrester Z. 5 and 5, skg. 

 (H. M., Kn.); 19. Halictus cylindricus K. $>, po-cltg. (Budd.); 20. H. rubicundus 

 Chr. 5, skg. (H. M.). 



Wiistnei saw the bee Halictus flavipes F. $ in the island of Alsen. 

 Alfken and Hoppner (H.) record the following for Bremen. 



A. Diptera. Syrphidae: 1 . Eristalis pertinax Scop. ; 2. Helophilus pendulus Z. ; 



3. Syrphus ribesii Z. B. Hymenoptera. (a) Apidae : 4. Andrena albicans Mull. S, 

 skg. ; 5. A. propinqua Schenck 5, do. ; 6. A. trimmerana K. J, do. ; 7. A. varians K. 

 $and$, do.; 8. Apis mellifica Z., do.; 9. Bombus agrorum F. 5, do.; 10. B. derhamellus 

 K. 5 (H.) ; 11. B. jonellus K. 5, skg.; 12. B. lapidarius Z. $, po-cltg. (H.); 13. B. 

 lucorum Z. 5, skg.; 14. B. pratorum Z. 5, do.; 15. B. sylvarum Z. 5 (H.); 16. B. 

 terrester Z. $, skg. ; 17. Halictus calceatus Scop. 5 (H.); 18. Nomada alternata K. 5 

 and J; 19. N. bifida Ths. $ and J; 20. N. ruficornis Z. $ and S; 21. N. succincta 

 Pz. $ and J, skg.; 22. N. xanthosticta K. $> and S; 23. Osmia rufa Z. t and 5. 

 (3) Tenthredinidae : 24. Pteronus ribesii Scop. (c) Vespidae: 25. Odynerus callosus 

 Ths.%. 



Friese observed the following bees in Mecklenburg and Baden. 



1. Andrena carbonaria Z., not infrequent; 2. A. fulva Schr. (Baden), one 

 individual; 3. A. nigroaenea K., freq. ; 4. A. tibialis K., do. ; 5. A. varians K., with 

 the vars. helvola Z. and mixta Schenck, do. 



Krieger saw the following bees at Leipzig. 



1. Andrena fulva Schr. ; 2. A. nitida Fourcr. ; 3. A. tibialis K. ; 4. A. trimmerana 

 K. ; 5. A. varians K. ; 6. Bombus hypnorum Z. 5 ; 7. B. lapidarius Z. 5; 8. B. pra- 

 torum Z. 5; 9. B. terrester Z. 5 ; 10. Nomada alternata K. = N. marshamella K. ; 

 11. N. lineola Pz. ; 12. Osmia rufa Z. 



Schmiedeknecht gives the following bees for Thuringia. 



1. Andrena albicans Mull. ; 2. A. fulva Schr. ; 3. A. propinqua Schenck ; 4. A. 

 trimmerana K. 5 and S; 5. A. varians K. 5 and J; 6. Bombus hypnorum Z. 5; 

 7. B. pratorum Z. 5; 8. B. terrester Z. $; 9. Nomada fabriciana Z.; 10. N. ochro- 

 stoma K., var. hillana K.; 11. N. ruficornis Z., var. flava Pz. 



