90 



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



The lodgepole sawfly {Neodijyrion hurJcei Midcl.) (fig. 45), in 

 the aduh stage, is about one-third of an inch long. Tlie males are 

 black and the females brownish. The hairless, wrinkled bodies of 

 the larvae are greenish or grayish, with lighter lateral and dorsal 

 stripes, brown heads, and black eyes, and are about 1 inch long when 

 mature. This species developed a severe outbreak in 1921 over a 

 large area of lodgepole pine at West Yellowstone, Mont. In the 

 next few years a tremendous acreage of lodgepole pine was defoliated 

 and a large percentage of the trees died. This outbreak was further 

 complicated by a contemporary outbreak of the lodgepole pine needle 

 tier (see p. 82). Control of both species along highways was effected 

 by spraying with lead arsenate. 



Figure 45. — Lodgepole sawfly {Neodiprion hiirkei) : A, Egg pockets in needle and 

 very roung caterpillars feeding. X 1.5 ; B, larvae at work, natural size ; C. hibernating 

 prepupa. X 5 ; D, pupa, X 5; E, adult female, X 7 ; F, adult male, X 7. 



Other species of the genus X eodijrnon which feed on the needles 

 of western pines include the following : 



Species of Xeodiprion Host and distribution 



N. fulviceps Cress Ponderosa pine. California. 



N. giUettei McGill Ponderosa pine. Colorado. 



N. edicardsii Norton Sugar pine, western white pine. California. 



X. rohiueri Midd Piiion and singleleaf i3ine. New 3Iexico 



and California. 



