UPON SCALE-INSECTS. 31 



the breaking up of thread-like ascospores (figs. 46, 47, 

 48). 



This fungus with black hemispherical stromata is apparent- 

 ly a species of Hypocrella, but its conidial stage can hardly 

 be included in Aschersonia on account of the colour and 

 other peculiarities. 



(?) Genus Drussiella, Pat. 



The fungus, supposed to belong to this genus, has not been 

 examined by the author. It is only referred to Drussiella on 

 account of its external resemblance and habit to D. tuberi- 

 formis, Pat., the only member of the genus, found on the 

 haulm of a bamboo (Arundinaria) in tropical America.* 



The specimen in question has been found several times by 

 Mr. Green on Arundinaria at Pundalu-oya, Ceylon. He con- 

 siders it to always originate on a coccid. It commences 

 beneath the leaf-scale of the bamboo and swells out into a 

 large black tuber (stroma). The scale-insect, apparently 

 associated with it, is Aclerda distorta. 



Pyrenomycetes-Perisporiales. 



Genus Apisporium, Kunze {Capnodium, Mont). 



This genus consists of black fungi often found growing on 

 " honey dew," deposited upon leaves by aphides and some 

 kinds of scale-insects. It appears under several conidial 

 forms, which are much commoner than the ascus stage. 



An instance of Capnodium growing on the sugary excre- 

 tion emitted by a coccid (Monophlebus) is recorded in a 

 paper by Stebbing.f But it may also be parasitic on cer- 

 tain scale-insects as well. This, at any rate, is possible 

 from a paper by BrittonJ on the natural enemies of the 

 San Jose scale (Aspidiotus perniciosus). He mentions a 

 fungus, probably a species of Capnodium, as causing a 

 reduction in the number of scales on infested trees. If he is 



* il Die Pflanzenfamilien." Teil I., Abtheil, I., p. 367. 



f Stebbing. Journ, Linn. Soc, XXIX., 1904, p. 154. 



J Britton. U.S.A. Exp. Sta. Connecticut, ReportEntom.pt. II., 1902. 



