INSECTS AK1-ECTI.\(; PARK AM) WUOUl.AM) I REES 485 



KOKKHN IN DKIKK ISIALI.V >I AMKA<TIH1.I> MOOIl 



White marked powder-post beetle 



Lycl2ts parallelopipcdus Melsh. 



Pin holes less than i/ih 'n<;li in diameter and galleries of the same size ninnint,' in 

 various directions in wood, may contain linear. l)la( k, white marked beetles about y,4 inch 

 long. 



This powder-post hcftlc has very similar lial)its to tliosc of the more 

 common species, L y e t u s u ii i ]> u n c t a t ii s Herljsl., ihoiij^di it ai^jjears 

 to be much rarer. Its dt^stnictive work was hrom^^du to our attention in 

 July 1903, on the reception of a piece of ash from a large furniture m.ui- 

 ufacturer of New York city, accompanied by the statement that the insects 

 were causing considerable damage to rough stock on hand and iiad also 

 bred out in numbers from manufacturetl products, to their great detriment. 

 The i)iece of ash was badly tunneled b\' the galleries of this insect and 

 practically worthless for furniture purposes. 



Description. The l)eetle is a jet black or dark brown, linear insect 

 about 3/16 inch long and easily distinguished from the common powder-post 

 beetle, L \- c t u s unipunctatus Herbst., by the broad, creamy white 

 band near the middle of the wing covers and extending almost to the 

 suture. The head and prothora.K are rather coarsely and irregularly 

 puncturetl, while the wing covers are ornamented with rows of closely set. 

 coarse punctures. The young or larvae are small, six legged, yellowish 

 white grubs with the tip of the body curved. 



The work of this species, like that of the common powder-post beetle, is 

 characterized by tine sawdust dropping from the infested lumber. 



Life history. This species evidently breeds freely in ash. It has been 

 recorded in tig and probably infests other dry hard woods. The beneticial 

 clerid, E 1 a s m o c e r u s t e r m i n a t u s .Say, was bred from the ash board 

 infested with this species and is luidoubtedly of considerable service in 

 preying upon this wood borer. 



Remedies. Measures of \,ilue against the i)owder-post beetle should 

 be of ecjual service in checking this species. 



