42 MISC. PUBLICATION 273, U.S. DEPT. OF AGRICULTURE 



Figure 15. — Pine twig weevils (Magdalis lecontei). Enlarged. 



than do Pissodes, the larval borings are fine-grained and powdery 

 instead of shredded, and the pupal cells are oval and smooth with- 

 out the lining of shredded wood fiber. The adults are bright blue, 

 green, or black, with prominent curved beaks. Western species 

 include the following: 



Species of Magdalis Hosts and distribution 



aenescens Lee Alder and apple. Alaska to California and 



eastward to Montana. 



alutacea Lee Spruce. Colorado and other Western States. 



cuneiformis Horn Ponderosa and Jeffrey pine. Western States. 



gentilis Lee Ponderosa and Jeffrey pine. California and 



Oregon. 

 gracilis Lee Alder, willow, and other broadleaved trees. 



California, Nevada, and New Mexico. 

 hispoides Lee Lodgepole and other pines. Maine to British 



Columbia, New Mexico, and California. 

 lecontei Horn Ponderosa, Jeffrey, sugar, lodgepole, and other 



pines. Pacific States. 



Small twig weevils of the genus Cylindrocoptiirus may be found 

 killing terminal and lateral branches of young conifers and, in 

 some cases, entire saplings. Many western pine species, true firs, 

 and Douglas-fir are attacked. At times these weevils become ex- 

 ceedingly destructive to young trees in plantations and in dense 

 stands of reproduction on burned areas. The adults are small, an- 

 gular weevils i/ 16 to y 8 inch long, more or less covered with silvery- 



