425 



Flower-pollination (N. Hartz). 



While referring to my observations from 1891 — 92 over 

 this question (IVledd. om Grønland, XVIIS, p. 300) Î cite below 

 the isolated observations from 1900: 



Sabine Island. 12.— 14. VII. 



Palaver radicatum — Bamphomyia [nigrita?). 

 Silène acaulis Ç — Agrotis sp. (hawk-moth). 

 Potentilla nivea — flies. 

 Polemonium humile — flies. 

 Stellaria hum if usa — flies. 



Cape Dalton. 20. VIÏ. 



Rhodiold rosea S' — fly- 



Dryas octopetala — numerous flies. 



Cassiope tetragona — numerous humble bees. 



Hurry Inlet. 



Chamænerium latifolium — humble bees, 31. VII and 4. VIII 

 Cerastium alpinum — flies, 11. VIII. 

 Silène acaulis Ç — Colias, 15. VIII. 



Polhems Valley. 28. VIII. 



Saxifraga aizoides — two humble bees (H. Deichmann). 



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