38 ANGIOSPERMAE—DICOTYLEDONES 



elongate, so that the anthers become exserted, and the pollen is carried by the wind 

 to the stigmas of younger flowers. {C/. Vol. I, p. 71.) Warnstorf describes the 

 pollen-masses as containing 3 or 4 grains of whitish colour, irregular, beset with rows 

 of tubercles, and 37-44 /x in diameter. 



Visitors. — Knuth observed the following in Schleswig-Holstein. — 

 A. Diptera. All skg. or po-dvg. : Syrphidae: i. Eristalis tena.x Z. ; 2. Sy- 

 ritta pipiens Z. ; 3. Syrphus balteatus Z*?^. ; 4. S. sp. B. Hymenoptera. Apidae: 

 all skg. 5. Apis mellifica Z. ; 6. Bonnbus cognatus Steph. 5 ; 7- B. terrester Z. 5 ; 

 8. Psithyrus rupestris F. S. C. Lepidoptera. All skg. {a) Noctuidae : 9. Plusia 

 gamma Z. (i) Rhopalocera: 10. Coenonympha pamphilus Z. ; 11. Polyommatus 

 phlaeas Z. 



Herm. Miiller gives the following Ust. — 



A. Diptera. {a) Bh/scidae: 1. Sarcophaga carnaria Z., skg. (p) Syrphidae: 

 2. Cheilosia longula Zell. ; 3. C. scutellata Fall., skg. ; 4. Chrysotoxum octoma- 

 culatum Curl., do. ; 5. Melithreptus scriptus Z., do. ; 6. Sericomyia borealis Fall., 

 do. (Thuringia) ; 7. Syritta pipiens Z., do. ; 8. Syrphus sps., do. B. Hymeno- 

 ptera. (a) Apidae : 9. Andrena dorsata K. 5, skg. and po-cltg. ; 10. A. fulvicrus 

 K. 5, skg.; II. A. fuscipes K. 5 and 5, do. ; 12. A. lapidarius Z. 5, do.; 13. A. 

 parvula Z'. 5, skg. and po-cltg. ; 14. A. simillima Sm. 5 and 5, do.; 15. Apis mellifica 

 Z. 5j extremely numerous, skg. ; 16. Bombus terrester Z. 5, ^ and S, skg. (also in 

 the Alps); 17. Diphysis serratulae Pz. 5, skg.; 18. Halictus cylindricus Z". S, do.; 



19. Saropoda bimaculata Pz. 5, do., with heather-pollen among its collecting-hairs ; 



20. Sphecodes gibbus Z. 5, skg. {b) Vespidae: 21. Vespa holsatica Z!, 5, skg. C. 

 Lepidoptera. Rhopalocera: 22. Vesperia thaumas Hfn. ( = V. linea IF. K), skg. 

 D. Thysanoptera. 23. Thrips, freq. 



Alfken and Hoppner (H.) observed the following at Bremen. — 

 A. Diptera. {a) Bombyliidac : i. Systoechus sulphureus ilZX'. {U) Muscidae : 

 2. Echinomyia grossa Z. ; 3. E. tessellata F. (c) Syrphidae : 4. Arctophila mussi- 

 tans F.; 5. Chrysotoxum festivum Z. ; 6. Syrphus pyrastri Z. ; 7. Volucella bom- 

 bylans Z. B. Hymenoptera. (a) Apidae : 8. Andrena argentata Sm. 5 ; 9. A. 

 fuscipes K. 5 and $ ; 10. A. nigriceps K. 5 and $; 11. A. thoracica F. 5, skg., 2nd 

 gen.; 12. Apis mellifica Z., very common; 13. Bombus agrorum Z. S, 5 and 5; 14- 

 B. arenicola 77/j. 2andS(H.); 15. B. confusus ^/zctc/' S ; 16. B. derhamellus Z". J ; 

 17. B. distinguendus iVor. 5,skg.(H.); 18. B.hortorumZ. ( = B. nigricans .Sf/^wnVt/e/'w.) 

 small 5, skg. ; 19. B. jonellus K. S, in great numbers, up to end of September, skg., 

 5 and 5 : 20. B. lapidarius Z. 5 and S; 21. B. lucorum Z. 5 ; 22. B. muscorum F. 

 5, 5 and S; 23. B. proieus Gersl. S; 24. B. terrester Z. S; 25. B. variabilis 

 Schmiedekn. j, 5 and S (H.) ; 26. CoUetes succinctus Z. 5 skg. and po-cltg., 

 S skg.; 27. Dufourea vulgaris Schenck } skg. and po-cltg., S skg.; 28. Halictoides 

 inermis Kyi. J; 29. Halictus calceatus Scop. 5 and J; 30. H. leucozonius Schr. S ; 

 31. H. punctulatus Z'. J; 32. H. rubicundus Chr. J; 33. H. sexnotatulus iVy/. S; 

 34. Nomada brevicornis Macs. S, skg. ; 35. N. jacobaeae Pz. 5, skg.; 36. N. obtusi- 

 frons Nyl. 5, skg.; 37. N. roberjeotiana Pz. 5, skg.; 38. N. solidaginis Pz. 5 and S, 

 skg. ; 39. Prosopis pictipes Nyl. S ; 40. Psithyrus campestris Pz. 5 and S (H-); 41. 

 P. rupestris F. J. (l>) Sphegidae : 42. Cerceris arenaria Z. 5 and S skg.; 43. 

 Mellinus arvensis Z. 5 and J. do. (< ) Tenlhredinidae : 44. Athalia lugens 7%.?. ; 

 45. A. rosae Z. 



Willis and Burkill record the following for Central Wales (' Fls. and Insects in 

 Gt. Britain,' Part I).— 



A. Diptera. (a) Muscidae: i. Calliphora erythrocephala Mgr, 2. Onesia 

 cognata Mg. ; 3. O. sepulcralis Mg. ; 4. Lucilia cornicina F., freq. ; 5. Pollenia 

 rudis F. (b) Syrphidae: 6. Eristalis tenax Z., freq., skg.; 7. Melanostoma scalare 



