INSECTS AFFECTING PARK AND WOODLAND TREES 693 



pines in June and July. This somewhat rare species has been recorded 

 from Massachusetts, New Hampshire, New Jersey and Pennsylvania and 

 Dr LeConte gives^its distribution as Lake Superior, Ohio and Maine and 

 states that it is not rare. 



Cloudy bark beetle destroyer 

 Thanasimiis nubiliis Kl. 



A small, black clerid with wing covers marked with zigzag black and gray transversa 

 bands occurs on spruce. 



The adults of this beneficial clerid feed on the spruce destroying bark 

 beetle, Dendroctonus piceaperda Hopk., and associated species. 

 The larvae of this predaceous form prey on the young and pupae of bark 

 beetles in their galleries. This very beneficial species resembles an ant in 

 appearance. It may be recognized by its black head, by the middle portion 

 of the body being red and the wing covers marked with zigzag black and 

 gray transverse bands. 



Hydnocera pallipennis Say 



A small beetle 3/ l5 inch long with pale yellow, irregularly mottled wing covers and 

 black head and thorax. 



This is a small beetle about 3/ l6 inch in length. It has a black head 

 and thorax, and the wing covers are a pale yellow and irregularly mottled 

 with brown. A single specimen was taken July 19, 1901, on hard pine at 

 Karner. It has been recorded by Dr Smith as generally distributed and 

 not rare in New Jersey. 



Hydnocera humeralis Say, var. cyanescens Lec. 



A jet-black, slender beetle nearly 3/ l6 inch in length, may be taken on low shrub 

 growths in midsummer. 



Examples of this species were taken on hard pine at Karner July 2, 

 1902. 



Description. This beetle is about 3/ l6 inch in length, black in color, 

 except that the head and thorax have dark grayish reflections in certain 

 lights. Eyes large, prominent ; thorax broader than long, subcylindric, with 



