18 Transactions British Mycological Soctety. 
R. geographicum DC. f., M.S. 
R. viridiatrum Koerb. f., M.S. 
R. petraeum Massal. f., M. 
R. confervoides DC. f., M.S.P. 
Lecanactis premnea Weddell f., H. 
L. abietina Koerb. f., H. 
Arthonia lurida Ach. f., S.D. 5 
A. gregaria Koerb. f., H. 
A. radiata Ach. f., H.; var. Swartziana 
Sydow, f., H. 
Lithographa dendrographa Nyl. f., H. 
Opegrapha atra Pers. f.,common; var. 
denigrata Schaer. f., S. 
OR variagleersiye wis 
O. vulgata Ach. f., H.D.; var. siderella 
Ny eee 
Graphis elegans Ach. f., P.D.; f. co- 
acervata Leight. f., H. 
G. scripta Ach. f., H. 
- Phaeographis inusta Muell.-Arg. f., H. 
P. dendritica Muell.-Arg. f., D. 
Enterographa crassa Fée f., D. 
Dermatocarpum aquaticum A. Zahlbr. 
Verrucaria maura Wahlenb. f., M. 
V. aquatilis Mudd f., D. 
V. margacea Wahlenb. f., P. 
. submersa Schaer. f., H.P. 
. viridula Ach. f., P.D. 
. nigrescens Pers. f., H. 
. glaucina Ach. f., M. 
. maculiformis Krempelh. f., M. 
V. muralis Ach. f., P. 
Thelidium Nylanderi Krempelh. f., P. 
Acrocordia gemmata Koerb. f., H.P. 
A. biformis Oliv. f., H.S. 
A. epipolaea A. L. Sm. f., P. 
Arthopyrenia epidermidis Mudd f., 
HP. 
Ssccs 
A. punctiformis Arn. f., M. 
A. fallax Arn. f., H.P. 
Porina carpinea A. Zahlbr. f., P. 
Pyrenula nitida Ach. f., H.S.D. 
The following Fungus parasites were found on Lichens: 
Ticothecium erraticum Massal. on Lecanora cinerea M. 
Ticothecium rimosicolum Arn. on Rhizocarpum petraeum M. 
Spegazzinia sp. on Pertusaria dealbata S. 
PRESIDENTIAL ADDRESS. 
By T. Peich, B.A, B50; 
FUNGI PARASITIC ON SCALE INSECTS*. 
The earliest record of a fungus parasitic on a scale insect was 
made by Desmaziéres in 1848}. His specimens were collected 
at Caen, in Normandy, growing on scale insects on willow and 
ash. He instituted for it a new genus, Microcera, and gave a 
fairly complete description, emphasising the fact that the fungus 
was enclosed in a veil or sheath which divided into teeth at the 
apex. Mucrocera may be said to be a Stilbum, which has 
Fusarioid conidia, and is enclosed in a sheath which partly 
envelopes the head of conidia. Desmaziéres was so impressed 
by the structure and habitat of his species that he added to the 
formal description a long account of it in which he allowed his 
imagination free rein and compared Microcera to a phalloid. 
Desmazi€éres’ species was next described by the Tulasnes in 
* From the mycological standpoint, it is convenient to include the fungi 
parasitic on Aleyrodidae with those on the true scale insects (Cocci 
tT Anw. Sci. Nat., Ser. 3; I. (1848), P. 359. ( occidae). 
