167 
fides. Kerosene emulsion diluted 9 times has been used successfully 
in one case on the mature scales, just before the young larva* emerged. 
Diluted from 11 to 15 times it has proved ineffective on half-grown 
forms; but diluted not more than 5 times it has proved effective against 
all the scales on the trunks. 
I see no reason why during the coming winter the San Jose" scale 
should not be practically exterminated in New Jersey. 
It is too early to speak of the life history of the species in New Jersey. 
Young larvae appeared early in June, and again early in August. 
Dr. Lintner expressed himself as greatly interested in the preceding 
papers, and queried if there were not a possibility of the dissemina- 
tion of the scale from California or other infested districts on fruit. 
He concluded, however, upon a general survey of the possibilities, that 
the chances of the scale carried about on fruit reaching a tree on 
which it would successfully establish itself were so slight as to be 
practically not worth consideration. 
Mr. Maria tt, referring to the discussion of the methods taken by 
nurserymen to rid their trees of the scale, and the statement by Mr. 
Smith of the completeness of this work, suggested that there was some 
danger in placing too much confidence in the work or the statements 
of nursery men in this particular. Mr. Marlatt pointed out the great ease 
with which one or two scales on a tree could be overlooked, even by 
an experienced entomologist, as illustrated by the case referred to by 
the author of the paper, in which he had concluded that certain trees 
which had been infested were entirely free from the scale, until later 
he happened to examine the fruit and found the scale was quite abun- 
dant on it; and he then also discovered that it occurred on the tips of 
the smaller twigs. 
Mr. Smith stated that in the case of the large trees referred to, on 
which he had at first failed to find the scale, he was misled by the fact 
that the scale had been entirely exterminated on the twigs and larger 
branches, and had not taken the trouble to examine the smaller twigs, 
knowing that the scale habitually confined itself to the older parts of 
tie tree; but in the case of nursery stock examination was much more 
easy, and he thought it quite possible to determine whether the scale 
had been completely eradicated or not; he stated further that the prac- 
tice of nurserymen was to cut their stock back so vigorously before 
sending it out, that examination was much simplified. 
With reference to the localities in Xew York where this scale had 
appeared, mentioned by Mr. Smith, Mr. Banks said that he had seen 
notices in the New York Times, three or four weeks since, of the occur- 
rence of the scale in three distinct localities, with the accompanying 
statement that active and thorough measures had been taken to exter- 
minate it. 
