158 



Insect Pests. 



As much as seven days' difference was noticed at one place by 

 Air. Farley (at L'iuvin) ; those on the Pdenheim Orange hatched on 

 the ovd of April, th.ose on the Wellicigton not until the lOtli of April, 

 and it was particularly noticed that they hatched first on the Eck- 

 linville, one of the earliest of apples. Xot many miles away at 

 Eardiston they did not commence to appear until the 12th. 



In Kent they have been found to vary in incubation lietween 

 the 24th of llarcli and the 27th of April. 



Schmidberger records them as hatching in Germany on the -jth of 



April, simultaneously with the 

 bursting of the leaves. 



The small larvai coming from 

 the ova at once ascend to the 

 buds, and if they are not suffi- 

 ciently open they may be seen 

 seated on the l^uds waiting to 

 gain entrance (Fig. 1M3). 



At first tlie larvfe are yellow 

 to dirty yellow witli brown 

 markings, briglit red eyes, brown 

 feet, and about the size iif a pin- 

 point ; tlieir form is seen in the 

 photograph (Fig. 12'.:i). They are 

 Cjuite flat, and soon work their 

 way into the folds of the buds 

 and at once commence to feed. 

 Sometimes these little larvai are 

 quite green, at others quite dark 

 in colour. 



Schmidberger found that the 

 larva:' cast their skin on the 

 second day after birth, and soon 

 after this that characteristic 

 ,ulol)ule, seen on tlieliudsand open trusses, makes its appearance from 

 the larval body, and tlien tlie white thread appears by which the oily 

 globule is attached. Another moult takes place in a few days, and then 

 tlie larva not only is provided witli the tliread and globule but also with 

 a number of ^^•hite waxy threads which partly cover its body. The 

 first change I liave found may take place ten days after liatcliing. 

 Tntil recently the first moult oliserved b)' Schmidlierger was not seen. 

 1)1 no case have I been able to detect moulting as soon as Silnnid- 

 bfiLjer descrilies. After clianging the second skin the I'svUa becomes 



[A. V. D. Itliituul. 



FIG. 132.— "VA OK Al'PLE SUCKEK, 

 SriO^VTNC >\ItKKE DEPl.tSITETi. 



(Sliu'litly uiagnilied.) 



