60 THE PLUM CURCULIO. 
39.04 per cent; and small, 15.69 per cent. Adults were never reared 
from the small larve, though the attempt was repeatedly made. 
At Barnesville, Ga., during 1910, observations were also made on 
this point. Among the first larve of the season to leave drop fruit 
was a large number of undersized individuals. Many were not more 
than one-half normal length, and from this they varied to full size. 
The proportion of small larve was greatest during the first week or 
ten days after larve began leaving the fruit, the proportion becoming 
less and less until by two weeks after the first larvee began emerging 
practically all individuals were of normal size. In Table XXI is 
shown the proportion of undersized larve during the period from 
May 2 to 21, when they were in evidence. 
TaBLE XXI.—Record of undersized and normal larvxe of the plum curculio from drop 
Jruit from 81 peach trees, Barnesville, Ga., 1910. 
| 
| 
Larve Distinctly | Larve Distinctly 
Dates. leaving undersized Dates. leaving undersized 
fruit. larve. fruit. larve. 
Number. | Per cent. Number. | Per cent. 
Mawadeon Se set sean 49 38 085 \ Mayet 2 eS tee Ae sea 272 8 
Seoue ese aes 68 33 48 1S scene nae 159 6 4 
ih ek eemst 119 48 40 Ne. Se ese Carita 86 5 6 
ih See oe ae os ee 164 66 40 1 eae eee 58 2 3 
Gees - eee ols 175 26 15 AGT oer See ee 48 . 1 2 
DR a5. se 99 26 26 ly Re aero Sey 38 1 3 
hE aera ae 110 12 11 ASis 34 ees es 33 OV ee se aoe 
eee Mee ates oe 357 80 22 9) oe Sarees 71 1h eee 
Oc Set oe Sees. 240 29 12 De Riss eee 102 1 1 
dp Peers A epee ae arr 209 28 23: | De esciisseee 54 1 2 
II 
NORMAL EMERGENCE OF LARVA FROM FRUIT DURING THE SEASON. 
In order to determine over what period and in what abundance 
larve left the fruit and entered the soil for pupation, as bearing on 
the period for cultivation for the destruction of the pupe, it was 
planned in 1908 regularly to collect, at frequent intervals through- 
out the season, all of that fruit which fell to the ground and to rear 
and record the larve as they emerged from the respective lots of 
fruit. This work was done during 1908 at Siloam Springs, Ark., 
using all drop fruit for the season from 120 peach trees; and during 
the same year at Washington, D. C., by Mr. P. R. Jones, with both 
peaches and Japan plums, using all of the drop fruit on 10 peach 
trees, and in addition to the drop fruit from 8 Japan plum trees 
that from the trees at ripening time was also. used. 
During 1910 similar data were obtained at Barnesville, Ga., and 
by Mr. Hammar at Douglas, Mich. In Georgia all of the drop fruit 
throughout the season from 31 peach trees was regularly collected 
and larve recorded as they came from the respective lots. At 
picking time the fruit from 12 of the 31 trees was gathered and 
