/>?.s'ff/.s' Injurious 1(1 t!ie Apple. 



IG- 



reveal these littl.. pests. Yumi- trues aiv often iiiirsted tno, l,ut 

 one IS not so sure of fiiului-- tJicni ,,ii youn,-, Mell ,T,reil fur trees, 

 as oil old and iie,<;-leuted ones. 



The Mussel Scale is so called liecause the scale rouohlv resenihlcs 

 in shape a miiuatare mussel shell. It is also called the ( h-ster-shell 

 r.avk Louse, because it also bears some similarity to the American 

 Blue-point (.)Yster. In size and exact shape there is much variation. 







^?N^t 



-f^rr- 



f 



FlCi. I:.i0,— THK MI;S.SI;L scale {Li_'^<ii!i,sup/,rs uhnh. 



1, female SL-alu (dur.sal ^-iew) (x I'O : '2, A'eiiti'al view w illi M\'a ( X l-'O ; 3, mature female beneath 

 ,seale(x 2u; ; 1, larva ( X .^U): .', male { x ::.".): '■- iiiale ^eale ( X l.">). 



Most insects var)^ in size, the cpiautity and ip.iality of food regulating 

 the growtli. Most mussel scales will be h.aiiid to ^au■y liet\ve(.'n ,1 and 

 1 inch in length. In form the hard scale is swidleu and rounded at 

 one end, more or less bluntly pointed at the other, the \\ifole scale 

 somewhat liattened in form, and very closely applied to the bark. 



