PEAR AND CHERRY SAWFLY ; " SLUGWORM." 79 



So far, however, as remedial measures have been tried, the result 

 has been very unsatisfactory. Quick-lime strewed on four infested 

 drills by way of experiment drove away some of the weevils, but "the 

 remedy could not be said to be successful." Soot did little or no good, 

 and hellebore was not reported as of service when used alone, but 

 mixed w^ith lime did the most good of the above applications. It was, 

 however, noticed that where gas-lime had been used in the previous 

 autumn the Turnip plants appeared less infested, and in a few instances 

 got into the rough leaf. 



PEAK. 



Pear and Cherry Sawfly ; " Slug worm." Selandria atra, Westwood ; 

 Tenthredo cerasi, Linn, (of Curtis) ; Eriocampa limacina, Andre. 



Tenthredo cerasi. — " Slugworm " and Sawfly, magnified, with lines showing nat. 



length ; cocoon. 



Amongst the various kinds of Sawfly attack which appeared in the 

 past season, that of the larva of the Pear and Cherry Sawfly, commonly 

 known from its very peculiar appearance as the Pear " Slugworm," 

 was perhaps more noticed than usual, and some very characteristic 

 specimens of the grub, both in its commonly observed slimy black 

 condition, and in the subsequent clean yellow caterpillar state, were 

 sent me. Some infested leaves gave me also the opportunity of 

 noticing the earlier part of the attack, when the larva is still within 

 the egg, and thus tracing the changes of appearance on from its first 

 white colour to the pale yellowish tints of the young grubs in their 

 early condition, before they assume the black slimy coating, from 

 which they take their name of " Slugworm." 



This infestation is sometimes exceedingly hurtful by the grubs 

 eating away the wbole of the upper surface of the leafage on which they 

 feed with the exception of the veins, and sometimes they are very 

 numerous. Often, however, where I have had the opportunity of 



