Describes experiments with sterility in Abutilon.

Describes hermaphroditism in a wild Begonia in Brazil.

Has been observing humble bees on Salvia.

FM much gratified by the appearance of Für Darwin translation.

Discusses dimorphism in Rubiaceae.

Describes experiments to test the fertility of Abutilon, which appears self-sterile,

and briefly mentions dichogamy in Eschscholzia.

Discusses dimorphic and trimorphic plants; mentions especially Rubiaceae and a dimorphic monocotyledon.

Notes observations on the monstrous male flowers of Begonia,

and on self-sterile plants.

Sends specimens of Passiflora and seeds for T. H. Farrer [letter enclosed with 7188].

His observations on mimicry in butterflies

and self-sterility in plants.

Discussion of mimicry and sexual selection among butterflies, occasioned by reading Descent.

Has no objection to CD’s alluding to FM’s idea that sexual selection has come into play in mimetic butterflies.

Reports observations on other butterflies and on termites.

Agrees with Bates that neuter termites are not modified imagos (sterile females), but modified larvae (of both sexes).

Systematic relations of stingless honey-bees (Melipona and Trigona) are not yet well established.

FM gives his own observations of leaf-cutting ants, which support those of Thomas Belt in his book [The naturalist in Nicaragua (1873)]. [See 9223.] These ants feed only upon the fungus that grows upon the leaves that they carry to their nests.

He has caught a moth of the Glaucopidæ that when touched emitted a cloud of snow-white wool.

Observations on the stingless bees of Brazil.