339 
by burning all near-by vegetation on which they feed; but this method 
is feasible only on waste lands. ‘A thorough, scientifically conducted 
search for and destruction of eggs, supplemented by burlapping and 
hand-killing, is the only method yet known that can be implicitly 
relied upon to secure extermination where fire can not be used.” 
Mr. Forbush is of the opinion that “If all trees and plants in and 
near each isolated moth colony could be sprayed with an insecticide 
which would surely and quickly kill all feeding caterpillars without 
injury to the foliage it would be the best plan to pursue in the towns 
least infested. Such an insecticide seems to have been found.” This 
is presumably the mixture referred to upon page 20 of the report as 
‘an arsenite with acetate of lead and glucose in water,” the formula 
being: Sodic arseniate, 29.93 per cent; plumbic acetate, 70.07 per cent. 
This mixture, it is stated, has given the best results yet obtained by 
spraying. 
Professor Fernald’s portion of the report is brief, and consists chiefly 
of quotations from Professors Packard, Weed, Fernald, Smith, and 
Lintner commendatory of the work done by the committee. Two more 
parasites, Pimpla pedalis and P. tenuicornis, the first omitted from the 
list of last year and the second bred from the Gypsy Moth this year 
(1893), are added to the previously known parasites, making eleven 
true parasites which live within the caterpillar, but which do not emerge 
until after it changes to a pupa and is dead. 
THE MEMBRACIDZ OF NORTH AMERICA. 
In the Bulletin of the Illinois State Laboratory of Natural History, 
current volume (pp. 391-482), Dr. F. W. Goding publishes a bibliograph- 
ical and synonymical catalogue of the described Membracide of North 
America. Thecatalogue is well arranged and well printed. Localities 
are given with care, but food-plants are omitted except in a very few 
ceases. The author introduces somewhat of an innovation by describing 
new forms in their catalogue position. In this way he prints descrip- 
tions of two new genera and sixteen new species. There are catalogued 
altogether 278 species, distributed among 65 genera. We are pleased 
to see the check-list idea giving way before these bibliographical and 
synonymical catalogues in comparatively new groups. The extra labor 
involved on the part of the compiler is much more than compensated 
for by the usefulness of the completed work. A thoroughly careful 
catalogue of this sort implies extended systematic work and indicates 
the near appearance of a monograph. 
THE CACAO BUG OF JAVA. 
We have recently received from Mr. A. King, manager of the cacao 
estate “‘ Aardenburg,” Java, owned by Mr. P. Maclaine Pont, of The 
Hague, specimens of an insect which does much harm to cacao, tea, and 
