322 THE CANADIAN ENTOMOLOGIST 



elliptical, dark brown, almost black; pronotum slightly broader 

 than long, broadest just before the base, constricted sharply at 

 base so as to be slightly narrower than the base of elytra; pro- 

 notum rounded, hood-shaped, anterior margin with two distinct 

 teeth near the apex, an obscure tooth lateral to each; pronotum 

 with prominent callosities arranged in six or seven, more or less 

 concentric circles; spaces between callosities with minute eleva- 

 tions, elytra finely and densely punctured; striae plainly seen but 

 appear as mere lines of enlarged punctures. Entire body covered 

 with fine yellowish hair, short on elytra, longer and coarser on 

 pronotum; ventral surface and legs clothed with medium long 

 yellowish hairs. 



Described from seven specimens, four males and three females 

 taken at Elk Lake, Oregon, August, 1914, Host Amabilis Fir 

 (Abies amabilis). 



A small stand of Amabilis Fir (Abies amabilis) saplings was 

 noted near Elk Lake at an elevation of 3,300 feet. The trees 

 looked sickly and the foliage on many branches was turning red. 

 Upon examination a tiny entrance hole was found just below many 

 of the branches, and a small, oval .chamber was eaten out. These 

 chambers averaged from ]/^to}4: inch across the longest diameter 

 and from 20 to 35 eggs were deposited therein, mingled with fine 

 bark borings. The eggs were slightly over }/2 mm. long and 3<4 mm, 

 wide, oval, transparent and white. The larvse when first emerged 

 are about the size of the egg and grow very slowly for some days. 

 _They develop to slightly over 2^ mm. long, but never become 

 very active. The pupae are from 1% to 2 mm. in length and }/2 

 to ^ mm. broad. The pupal cells are in the cambium. 



Eggs are deposited the last week in August and hatch in 5 

 days; the slightly yellowish larvae work out in all directions from 

 the egg chamber, girdling the small limbs and covering a space- of 

 5 or 6 square inches. Though not definitely established, it is 

 very probable that each pair of beetles make more than one egg 

 chamber. Both male and female work at excavating the egg 

 chamber. 



Cryphalus subconcentralis Hopk. 



Astoria, Oregon. May 24, 1899. Hubbard & Schwarz. 



