76 
K. MIYABE AND K. SAW ADA. 
In every instance, he invariably found beneath the subieulum of the fungus 
a colony of scale-insects entirely overgrown and destroyed by the mycelium. 
He seems to regard, that the fungus is from the beginning purely parasitic 
on scale-insects, and that it does not require a preliminary nourishment on 
their excretions, as Sawada has pointed out. 
Quite recently, Sawada (26) has also shown that Helicobasidium Tanakae 
Miyabe, which causes a “plaster-disease” on the branches of Morus alba , 
Prunus Mume, P. communis, P. Perdca, P. serrulatus, Pirus sinensis and 
Broussonetia papyrifera, behaves similar to his Septobasidium in Formosa. 
In these cases, Biaspis pentagona is concerned with the development and 
growth of the fungus. 
Practically nothing has been done so far in our country in the way ot 
controlling the ravages of scale-insects by means of the artificial infection of 
their fungus-parasites. Nomura (18) succeeded in making artificial cultures 
of his Nectria and recommended its employment for such a practical end. 
From the time Webber (31) suggested the economic importance of 
these fungi, many American botanists and entomologists, especially those 
connected with the Florida Agricultural Experiment Station, have been ac- 
tively engaged in perfecting the method of artificial infection. The names of 
Rolfs (21, 22), Gossa rd (12), For bes (11), F a wcett (10) and Berger 
(1-5) should be mentioned in connection with this interesting work. 
Aschersonia Aleyrodis Webber. (PI. VI. fig. 1-7) 
Webber, in U. S. Dep’t. Agric. Div. of Veg. Pliys. aiid Path. Bull. 13 . 
(1897), p. 20; Rolfs and Fawcett, Florida Agric. Exp. Stat. Bull. 94 . 
(1908), p. 15 ; Fawcett, Special Studies. No. 1. Univ. of the State of Flo- 
rida. (1908), pp. 10-17; Saccardo, Syll. Fungorum, 14 . (1899) p. 991. 
Aschersonia tahitensis W ebbe'r, in Jour, of Mycology, 7 . (1894), p. 363; 
Swingle & Webber, Div. Veg. Phys. and Path. Bull. 8 . (1896), p. 27. 
Stroma hypophyllous, depressed hemispherical, yellowish-white to cream 
colored, coriaceous, 1— 3 mm. in diameter, sclerotioid formed of thick-walled 
