THE GENUS DENDROCTONUS. 
79 
breed in injured, dying, and felled trees, in company with one or 
more of the other species. (See also general discussion under " Char- 
acter and Extent of Depredations" and " General Methods of Con- 
trol" (pp. 4 and 29-35), and "Economic Features/' etc., for Nos. 1, 
2, and 4. 
BASIS OF INFORMA- 
TION. 
Information re- 
garding this bark- 
beetle is based on 
investigations by the 
writer at Williams, 
Ariz., September, 
1902, at Flagstaff, 
Ariz., in 1904, and at 
Palmer Lake, Colo., 
October, 1905; by 
Mr. J. L. Webb at 
Flagstaff, Ariz., May 
to September, 1904, 
in the Capi tan Moun- 
tains, and White 
Mountains, and at 
Cloudcroft, N. Mex., 
and in the Santa 
Catalina National 
Forest, Rincon 
Mountains, and Chir- 
icahua National For- 
est, Arizona, May to 
September, 1907 ; by 
Mr. W. F. Fiske at 
Capitan, Cloudcroft, 
andMeeks, N. Mex., 
March to May, 1907; 
by Mr. H. E. Burke 
at Kamas, Pan- 
guitch, and Pan- 
guitch Lake, Utah, 
Fig. 42.— The Colorado pine beetle: Egg galleries 
(Author's illustration.) 
Reduced. 
July, 1907; by Mr. W. D. Edmonston at Brookvale, Monte Vista, and 
Laveta, Colo., in 1907. Additional localities through correspondence 
and from other collections are the Chiricahua Mountains, New Mexico ; 
Paradise and Show Low, Ariz., and Glenhaven, Colo. It is repre- 
