120 
Hancochia, t. 2945, is a monotypic genus of Orchidaceae, tribe 
Epidendreae, differing from Nephelaphylium in its short 1-flowered 
scapes, subconnivent sepals and petals, and long slender spur. 
uniflora, Rolfe, was collected in mountain forests of Mengtze, 
unnan, by Mr. W. Hancock. 
Heteranthoecia, t. 2927, Gramineae, tribe Paniceae, is inter- 
mediate between Jsachne and Coeluchne. H. isachnoides, Stapf, has 
been collected in Nupe and in the Snussi Country, French Congo. 
Lintonia, t. 2949, ass aca tribe Aveneae, is allied to the 
Australian genus Astrebla. L. nutans, Stapf, is known only from 
Nairobi, British East Africa. Dignathia, t. 2950, Gramineae, 
tribe Zoysieae, consists of two species, natives of British Last 
Africa. It is allied to Latipes, Kunth. 
Among the other — figured are the followimg :— 
Xylia Kerrii, Craib et Hutchinson, t. 2932, Leguminosae, tribe 
Adenanthereae, a sities of Siam and Burma. 
Brachylaena Hutchinsit, Hutchinson, t. 2928, Compositae, tribe 
Tnuloideae, a native of British East Africa, It is a tree attaining 
a height of 90-100 ft., and gan a durable timber, which is not 
subject to the ravages of white ants. 
Arrabidaea crassa, Sprague, t. 2933, Bignoniaceae, tribe Bignonieae, 
a very distinct species remarkable for its exserted stamens and 
acutely angled, almost winged capsule. 
Ocotea usambarensis, Eingl., t. 2934, Lauraceae, tribe Perseeae, a 
very valuable timber tree, native of Tropical Kast Africa. 
Tylostemon ugandensis, Stapf, t. 2943, a native of Uganda, belongs 
to the same tribe. 
Phyllanthodendron roseum, Craib et ea t. 2935, Euphor- 
biaceae, tribe Phyllantheae, a native o 
rath pape Sp tesselata, Munvo, t. 2930, “He South African Bam- 
of which flowering specimens have only recently been 
collected. 
« Die-Back ” of Cacao and of Para Rubber. ny htie cacaoicola, 
P, Henn., was first observed on cacao wood from the Cameroons 
in 1896. "Since that date the fungus has proved a veritable scourge 
in cacao plantations, in localities as far distant from each other as 
the West Indies, St. Thome, Federated Malay eit Philli-. 
pines, &e. 
The form-genus Diplodia contains many injurious parasites, 
and in only a few instances the higher or ascigerous condition 
of the fungus is known. An attempt to solve the life-history of 
D. cacaoicola, was undertaken by Mr. Keith Bancroft, in the 
Jodrell Laboratory, at Kew, from material received from West 
Africa, teeming with the Diplodia, which has resulted’ in demon- 
strating that the Diplodia is followed in due course, on dead 
material, by an ascigerous condition of the fungus, which proves 
to belong to the genus i tana The species is new and. has 
been described as 7. tarda, Bancro 
. Further observations have oe that. Thyridaria tarda is the 
cause of the “die-back ” disease of the cacao plant and of, the, 
