REPORTS BY THE HONORARY SCIENTISTS. 307 
case of fungoid disease was brought to my notice by Mr Alexander 
M‘Rae, of Co. Kilkenny, and proved to be the ‘“‘ Cluster Cup” of 
the Hawthorn (Roestclia lacerata). This interesting fungus 
resembles Rust of Wheat, in that it requires two species of host- 
plant whereon to complete its development (Heterecious Para- 
sitism), the alternation of generations in this case being between 
the Hawthorn and the Juniper. The cluster cups of the Haw- 
thorn occupy swollen patches of the shoots, leaves, and fruit, 
and on bursting emit numerous yellowish spores, The parasite 
is very common, but cannot be said to be of much economic 
importance. Removal of infected parts would certainly be desir- 
able in the case of ‘‘specimen” trees, such as the Red Hawthorn 
on which Mr M‘Rae found the diseased shoots. 
3. Report by R. Stewart MacDoveatt, M.A., D.Sc., Honorary 
Consulting Entomologist. 
Interest in entomology among the members of the Royal 
Scottish Arboricultural Society seems to be on the increase, for 
this has been my busiest year, queries about insects and their 
work having been received from England, Scotland, Ireland, and 
Wales. In addition to other insects, I have sent replies relating 
to the work of the following species :— 
Scots Fir. — Pissodes notatus, Pissodes pint, Bostrichus 
bidens, Bostrichus lineatus, Tomicus acuminatus, 
Hylesinus palliatus, Hylesinus ater, Hylesinus pina- 
perda, Stirex juvencus. 
Spruce.—Hylesinus palliatus, Bostrichus lineatus, Hylobwus 
abietis. 
Spruce Cones.—Phycis abietella. 
Larcu.—Hylesinus palliatus, Bostrichus lineatus, Sirex 
gigas. 
Oak.— Xyleborus Saxesenti, Cynips Kollari, Tortrvx 
viridana. 
Asu. — Hylesinus fraxini, Hylesinus crenatus, Sphina 
higustri. 
Breecu.— Ptilinus pectiniformis. 
Bireu.—Cossus ligniperda. 
Pear.—Diplosis pyrwora. 
Hotty..—Phytomyza thes. 
