Finds no trace of nectar in Stanhopea saccata.
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Finds no trace of nectar in Stanhopea saccata.
Fancies articles on "The queen bee" and "Drone influence" [J. Hortic. 8 October 1861, p. 39] may be of interest. Since writing the latter, one of his drones hybridised a queen at a distance of a mile and a half.
Notes several cases of "dioecio-dimorphism" in different genera; feels the discovery of pollen that will act only on the pistil of another flower is most important. Believes CD should next turn his attention to investigating cases of "precocious fertilisation".
Replies to CD’s query (see 3778): the queens or females of the humble bees are not fertilised in the air. Offers a number of observations relating to the fertilisation of bees and wasps, which he has made in the course of sixty years.
Ice could not have formed the blockages in Lochaber unless in every case the water escaped over some col into a contiguous valley on the same watershed, or into the eastern watershed. Supposes that the cols were not land-straits, but the places where the lakes were drained when forced to flow the wrong way.
Discusses his observations at Glen Roy. Mentions glaciers seen by Hooker in the Himalayas. Discusses problems of glacier–lake theory.