Responds to JD’s letter [2944]. Would like to know whether bees extract pollen from within the indusium of Leschenaultia. He suspects they brush over and partly open the indusium while sucking nectar from the flower.

Asks also about malvaceous plant that set seed although its flower never opened.

Has been watching the achenia of the plant sent by JD and, if Hooker agrees, will publish a note on it ["Achenia of Pumilio argyrolepis", Collected papers 2: 36–8].

Requests date of [C. S.] Rafinesque[-Schmaltz], New flora of North America, pt 1 [1836].

Thanks for declination readings from photograms at Kew. Thinks meteorological observatory on Vesuvius is good idea, but not sure a magnetic one is. Includes two charts of world.

Has received letters of January and March on his return last month. Thanks for papers but has not received the list of longicorns of Australia. "The quantity of obscure species in my collections are beginning to frighten me." Has just packed over 13,000 specimens, but they are particularly poor in longicorns and Coleoptera generally. The geographical distribution of insects in the archipelago is far less strongly marked than that of birds and mammals, may be imputed to the greater liability of insects to accidental dispersion etc.