ADDITIONAL INSECT ENEMIES, 133 
CHAPTER XX. 
ADDITIONAL INSECT ENEMIES. 
Since the first edition of this work was published sev- 
eral additional insect enemies of the quince have been 
discovered, or recognized as being more or less injurious 
to either the fruit or plant; consequently, I have 
thought best to give a brief description of these, with 
notes upon their habits, and remedies whenever known. 
ATTACKING THE BRANCHES. 
XYLOTRECHUS COLONUS.—A small, slender, longhorn 
beetle, somewhat less than one inch long, and of a light 
brown color, and large dark patches on the back and 
wing-covers. Has been found boring in the twigs and 
larger branches of the quince, but mainly in those that 
are diseased and dying. This insect usually attacks 
diseased trees of various kinds; consequently it cannot 
be considered as especially injurious to the quince. ‘The 
most practical way of destroying this pest is to cut off 
and burn all diseased twigs and branches as soon as their 
condition is observed. 
ATTACKING TRUNK AND BRANCHES. 
The Cryptophasa unipunctata, Don., is a very pretty 
species of Lepidoptera. Years ago it was observed in 
the Black Wattle, Acacia decurrens, but now is destruc- 
tive to all trees of the Losacee, and includes the plum, 
apricot, peach, cherry and nectarine. 
The full-grown larye are about one and one-third 
inches long; the truncated head tapers in front, with 
ample mouth-parts for burrowing. The body is in 
twelve segments, of a dull, pale chocolate brown, except 
the second, which is pitchy black, ‘The spiracles and 
