619 
Mussz, ScaLe (Mytilaspis pomorum, Bouche). 
This scale insect is a serious pest of the apple trees in various 
parts of the world; it also infests the pear and other fruit-trees, 
but it displays a partiality for the apple. 
This species ean be readily distinguished from the other species 
of scale insects that infest apple trees, and mentioned elsewhere in 
these pages. The scale of the female is long and narrow, and more 
or less curved, and widened at the posterior end, and measures from 
Mytilaspis pomorum: a, adult male; 6, foot of same; ¢, young larva; 
d, antenna of same; ¢, adult female taken from scale; a, ¢, ¢, greatly en- 
darged + b, d, still more enlarged. (Year Book, U.8. Department of Agricul- 
ure 1894.) 
one to one and a quarter lines in length. Colour, dark yellowish- 
brown. The scale of the male is smaller than that of the female, 
and nearly straight. It is not so dark in colour, and has a mottled 
appearance. 
Remedies —In winter months use Nos, 6, 10, 14, 20, or fumigate 
with No. 18 (see pp. 528-530). 
Several parasitic fungi (Microcera, sp.) occur in Australia, 
and are reported to feed on the red scale of the orange (Aspidiotus 
coccineus); on an Aspidiotus of a eucalypt in Tasmania, and one 
(1. mytilaspis, McAlpine) feeds on a mussel seale of the eucalyptus. 
