March, 1922.] Chamberlin : A New Enemy of Yellow Pine. 69 



A NEW LEPIDOPTEROUS ENEMY OF YELLOW 

 PINE IN OREGON. 



By W. J. Chamberlin, ■ 



Forest Entomologist Oregon Agricultural College. 



Coloradia pandora Blake Fam. (Saturnidae). 



The genus Coloradia was erected by Blake^ for the species pandora 

 in 1863 and the description was based on a single specimen from 

 " Pikes Peak, Colorado Territory." Barnes- described C. doris as a 

 new species from Salida and Greenwood Springs, Colorado. Dyer^ 

 lists doris as a variety and gives the distribution of the species as 

 " Rocky Mountains." Holland* gives the range as " Eastern foot hills 

 of the Rocky Mountains to the Cascades and from Montana to Mex- 

 ico." Comstock^ simply states that Coloradia is the lowest genus in 

 the family Saturniid?e, and that it is a rare insect from the West. 

 Other than the original description and the few remarks quoted above, 

 I have found no reference to this species in our literature.*' The moths 

 seem to be represented but rarely in collections, yet in certain localities 

 they appear in large numbers at times. 



Description : 



Eggs 2.5 mm. long by 2 mm. in width, flattened on both upper and 

 lower surfaces, pale bluish-green color and semi-transparent when de- 

 posited, later, becoming opaque and of a duller green. The upper sur- 

 face has a tendency to shrink, becoming strongly and irregularly 

 depressed. The eggs are deposited in clusters of from six to seventy- 

 four on the trunks of yellow pine. 



1 Blake, C. A., Proc. Ent. Soc. Phila., 11, p. 279, 1S63. 



2 Barnes, Wm., Can. Ent.. XXXII. p. 46, 1900. 



3 Dyer, H. G., U. S. Nat. Mus., Bui. No. 52, p. 74. . , 



4 Holland. W. J., The Moth Book, p. 91, 1903. 



5 Comstock, J. H., Manual for the Study of Insects, 1917, p. 350. 



6 Since the above was written Dr. J. M. Aldrich informs me that he has 

 secured caterpillars from the Mono Lake region in California and reared the 

 adults which are C. pandora. The species attacks Jeffrey Pine in the Mono 

 Lake region and the Indians gather and dry the larv^, which are used for 

 food. See Journ. N. Y. Ent. Soc, Vol. 20, page 28. 



