INSECTS AFFECTING PARK AND WOODLAND TREES 369 



Description. The beetle is much flattened and is about x / 2 inch long, 

 with the head and thorax black, and the striated wing covers a dark bluish 

 green. The powerfuT jaws are rufous, tipped with black, and the antennae, 

 legs and abdomen are similiarly colored. The insect is represented on 

 plate 64, figure 2. 



The pupa is whitish, more slender than that of Rhagium, and may 

 easily be recognized by its occurring in cells with walls composed entirely 

 of nearly rotten particles of bark [pi. 64, fig. 3]. 



The pupal cell is nearly circular, about ^ inch in diameter, and is 

 constructed between the bark and the wood. There is no excavation in 

 the wood and the walls are composed only of partly rotten borings [pi. 64, 

 fig. 9]. The difference between the cells of Rhagium and Pytho is well 

 brought out in the illustration. 



Life history. The larva evidently becomes full grown the latter part of 

 the season and transforms to the pupa and then to the beetle before the 

 approach of cold weather. The species hibernates probably very largely in 

 the pupal cells or under the bark. 



Bibliography 



1893 Hopkins, A. D. W. A T a. Agric. Exp. Sta. Bui. 32, p. 204 



1899 W. Va. Agric. Exp. Sta. Bui. 56, p. 441 



1903 Felt, E. P. For. Fish & Game Com. 7th Rep't, p. 494 



Spruce timber beetle 



Xy lot eras bivittatus Kirby 



A rather stout, brownish black beetle, about }i inch long, attacks the exposed wood 

 of various coniferous trees. 



The deserted galleries of this species were found by the writer in a 

 spruce log at Floodwood in 1901. This beetle was breeding Aug. 23 at 

 Axton in a stump of a balsamtree which had been cut the preceding April. 

 It has been recorded by Dr Hopkins as infesting black spruce and hemlock 

 in West Virginia, and Dr Packard states that the insect occurred, though 

 not commonly, under the bark of a fir in the White mountains near the 



