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72 TEACHERS' MANUAL.
Genus Diaspis,
Q.—Describe the characters by which the insects of this
genus are distinguished?
Q.—Name the example given in the illustration of the Kose
Scale? A.—Fig. 312, rose branch infested by the Rose Scale,
1; female Scale, la ; male Scale, lb ; (1, natural size ; la and
lb, enlarged).
Q.—Wherein do Scale of this genus differ from Aspidiotus?
NOTB.—The Oyster Formed Scale-insect belongs to this genus.
Genus Chionaspis.
Q.—Describe the characters by which the insects of this
genus are distinguished?
Q.—Wherein do the insects of this genus resemble those of
the genus Diaspis and Mytilaspis?
Q.—Name the examples giveu in the illustrations of the insects
of this genus. A.—Fig, 313, branch infested by the
Scurfy Scale-insects, 1; male Scales, showing insect, la ; male
insect, perfect, lb ; female insect and scale, 1c ; (la, lb and
lc, enlarged ; 1, natural size).
Genus Mytilaspis.
Q.—Describe the characters by which the insects of this
genus are distinguished?
Q—Wherein do the scale of the male and that of the female
differ?
Q.—Name the examples given in the illustration of the insects
of this genus? A.—Fig. 314, orange leaf infested by
the Citrons Scale-insect, 1 ; scale of females, dorsal view, la ;
scale of female with ventral scale and eggs, lb ; scale of male,
lc ; (1, natural size ; la, lb and lc, enlarged).