248 
(Dialeurodes citrifolia). Spraying is zeeommended with a mixture 
of soap } lb., paraffin a 2 gallons, water 1 gallon, diluted to 
10 to 50 times with wate 
Biological control by oe introduction of entomogenous fungi 
has received considerable attention and is assisted by the Florida 
State Plant Board, who distribute fungi cultures for this purpose. 
XXXVII._NOTE ON JUNGERMANNIA HUMILIS. 
W. H. Pearson. 
Being interested in Jungermannia humilis, Hook. {. & Tayl., 
on account of having received specimens from New Zealand, 
which I thought might be referred to it, I wrote to Kew asking 
permission to see the original specimen from Kerguelen’s Land 
collected by Dr. Hooker on the Antarctic Expedition. The Direc- 
tor kindly sent me the specimen, which had been referred to the 
genus Lophocolea by Stephani, after having been examined by 
him, as he states in his “‘ Species Hepaticarum,” vol. IT, p. 50 
(1906). 
I was also favoured by having the opportunity of examining 
two specimens from the same region, collected by Cunningham, 
which had been named by Stephani, Lophocolea humilis, Hook. £. & 
specimen named by Stephani, Lophocolea humilis, Hook. 
Tayl., which had been collected by Dusén in Patagonia 
On careful examination I find the four specimens named 
Lophocolea humilis by Stephani are four widely different species 
belonging, so far as my knowledge of Hepaticae goes, to three 
different genera; they all agree, however, in having large under- 
leaves. Unfortunately the specimens being sterile, it is somewhat 
difficult to determine whether a plant is a Lophocolea or a Leioscy- 
phus, but one character, the postical branches, is constant in the 
type of Leioscyphus humilis, and this with the large free under- 
leaves, along with a firmer texture, sufficiently enable me to refer 
it to that genus, and not to Lophocolea which has lateral branches 
with the underleaf often connate to the adjoining leaf 
The specimens collected by Dusén are also to be referred to 
Leioscyphus. It is, however, an entirely different species from 
humilis; the shapes of the leaves, some of which are apiculate, 
and the different shape of the underleaves at once separate it. 
One of Cunningham’s specimens is a true Lophocolea and the 
other a Conoscyphus. 
I add a full description and figures of the four species. 
The terms used in my descriptions denoting size of plants 
and cells are those adopted by Dr. Spruce, in his “‘ On Cephalozia, 
its subgenera and some allied genera.’ Malton (1882), and 
other works. 
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