INSECT ENEMIES OF WESTERN FORESTS 43 
prevention of damage to ornamentals. Several western species of 
these moths have been described. 
The cypress tip moth (Argyresthia cupressella Wlsm.) attacks 
Monterey and other species of cypress in central California. Two 
related species, A. ¢r7faciae Braun and A. franciscella Busck, are 
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FiGuRE 19.—The cypress webber (/pinotia subviridis): A, Adult moth, X 3.25; B, eggs, 
greatly enlarged; C, larvae, X 10; D, pupa, X 10; H, cocoons on twig, natural size, 
and abdominal tip of pupa. (Drawings by Edmonston.) 
often associated with the cedar tip moths and cause similar damage. 
The incense cedar tip moths (Argyresthia libocedrella Busck and 
A. arceuthobiella Busck) attack the twigs and leaflets of incense 
cedar in Oregon. 
The cypress webber (Z'pinotia subviridis Hein.) (fig. 19) in the 
caterpillar stage burrows through cypress leaflets, leaving a webby 
trail, and then ties bits of gnawed twigs and leaves together to form 
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