190 TlMEHRI, 
is the ascription to coleopterous forms which are found 
present in a cane, of a damage really initiated by moth 
forms which at the time of observation are absent. The 
period of the moth-borer attack may be almost called a 
transient one, since after their metamorphosis the moths 
take wing and flyaway, leaving no certain record behind 
them except perhaps to one who is really very familiar 
with their depredations. The beetles, as a rule, taking 
advantage of the resulting weakness caused by the moth- 
borers, settle in the diseased cane, and, so to speak, make 
a home there, and may there go through a long life 
history. They may thus be called permanent as con- 
trasted with the moths. The finding of such forms does 
not necessarily explain the origin of the damage — and 
nothing but continuous observation, with the most care- 
ful determination, of the larvae at first observed, can 
place the matter on any sound basis. 
Mr G. W. Smith, Curator of the Government Botanic 
Gardens of Grenada [Barbados Agricultural Reporter, 
March 29th, 1892), from direct observation, has thus far 
made the most valuable contribution to the subject. Mr. 
T. D. A. COCKERELL, Curator of the Institute of Jamaica 
{Bulletin of the Botanical Department of Jamaica, 
April 1892), has followed with a compilation from various 
sources giving a very valuable and detailed account of 
the commonest of the moth borers of the sugar-cane 
(Diatrsea saccharalis — Fabr.^Z ; but, unfortunately, the 
opportunity of field-work on the pest, and personal 
familiarity with its history, which would have given a 
special and critical value to the summary, seems to have 
been wanting to the author. 
Mr. J. H. HART, Superintendent of the Botanic 
