292 APPENDIX. 



wholesome circulation of air through the crowded "head" of the 

 Rose-tree. 



Order your selection of new Roses in pots from the nursery, 

 repotting those of which you have the best hope, and keep them 

 under dass for a time, so that in 



&' 



Jime 



you may bud them on some of your most forward stocks; and 

 then, by turning them out of their pots into the open ground, and 

 by encouraging them in every way to make a fresh growth, you 

 may obtain a second supply of buds in the autumn, when you will 

 know more as to their merits. 



If May has been genial, June will be glorious. If not, we shall 

 have the aphis, honey-dew, 7iiildew, rust, larva of saw-fiy, swarming 

 like voracious ravens to peck at the wounded stag, until the poor 

 Rosarian is nearly driven out of his wits, as Mons. Vibert was 

 driven from his nursery near Paris to St Denis, by the ver blanc 

 (grub of the cockchafer), which destroyed all before it. Reaumur 

 made a calculation that, in five generations, an aphis might be the 

 progenitor of 5,904,900,000 descendants; and a writer in the 

 Entomological Magazijie (No. iii. p. 217) communicates the result 

 of much careful observation, as follows : " Insects in general come 

 from an egg ; then turn to a caterpillar, which does nothing but 

 eat ; then to a chrysalis, which does nothing but sleep ; then to a 

 perfect butterfly, which does nothing but increase its kind. But 

 the aphis proceeds altogether on another system. The young 

 ones are bom exactly like the old ones, but less. They stick their 

 beaks through the rind, and begin drawing up sap when only a 



