296 



NEW VUKK STATE MLSELM 



Pityophthorus sp. 

 A dead |)iece of black Ijircli was found by the writer Aug. 5, 1900, 

 wliicli showt-d the work of this inleresting species. The central chamber, 

 as in the case of some alHed species, opens into primary or egg galleries 

 which run in the sapwood across the grain and are directly opposite each 

 other. The s])ecimcn in hand, a twig about i ':J. inches in diamc^ter, was 

 half girdled by one pair of these galleries which are less than ' '32 inch in 

 diameter. The larval galleries are near together, dilate gradually, are 

 somewhat tortu(Mis, follow the grain of the wood, and may attain a length 

 of I '/j^ inches. They lie largely in the inner bark toward their extremity 

 and the wood is scored somewhat. 



Powder post beetle 

 Lyclus iiiiipitnctatHs Herbst. 



Fine, white dustlike borings and numerous minute holes in well dried hard woods 

 are good indications of the presence of this little brown insect j^ inch long. 



This species is well known as tlestructive to seasoned woods and occa- 

 sionally it makes its ai)pearance in very unexpected localities. The writer's 

 attention was called to this beetle in June, 1899, on account of its 

 operations in some boards forming ])art of a carriage. Prof. 

 Ci. C. Davis, formerly connectetl with the Agricultural College 

 of Michigan, records this insect as infesting floorings in the col- 

 lege hall which had been laid two vears before. He states that 

 the beetles issued from the sapwood only and were probably 

 Fig. 56 PowUcr in it at the time the lumber was sawed, and Dr J. B. Smith has 



post beetle. . .... . /• ■ 



much enlarged uoted AW uistauceof tlus species cmerguig 1 roui a seasoned man- 

 tel wliich had been varnished. This insect is much better 

 known as a pest of such well se;isoned articles as wheel spokes and tool 

 handles. The beetle has been l)pd from the branches of several species of 

 oaks and from hickory, and Dr 1 lagen records it as injuring supple jack, a 

 vine imported from Jamaica. Dr [. B. .Smith states that it occurs in dry 

 wood often after the latter has been manufactureil into furniture or trim- 



