INSECTS AFFECTING PARK AND WOODLAND TREES 



669 



Blue horntail 

 Paitriirits lyaiuiis I'abr. 

 A small horntail conspicuous because of its blue abdomen and rufous legs attacks 

 spruce and fir. 



This horntail is even rarer than llie prececlin_Lj and may be recognized 

 1)\- its unicolorous antennae, the- trianguhir apical horn of the female in 

 connection with its blue abdomen and the rufous legs. its habits are 

 probably similar to those of the foregoing species, antl it has likewise been 

 recorded as working in spruce and fir. 



Tetropium rinnamopterum I\irb)- 



.\ somewhat cylindric black or brownisii beetle about 

 '^ inch long occurs in July on spruce. 



It may be recognized by its jet-black head and 

 thorax, which latter is nearly cylindric, though 

 swollen at the middle, and by the dull brown wing 

 covers. This borer, according to Dr Hopkins, 

 infests the green bark and wood of injiu^ed and 

 dying spruce trees in West \irginia. He states 

 that it is very injurious, since it hastens the death of 

 the trees and causes rapid decay of the wood. 

 Adults were taken by him in March and July. 



Fig. i<j6 Tclropium cinna- 

 moptcrum, cnl.irgcd (uriginaO 



Phymatodes dimidiatus Kirby 



A black, red-shouldered, flattened beetle about ^ ,., inch in length, occurs on spruce. 



E.xamples of this species were taken on spruce at Big Moose N. Y., 

 July 7, 1903. 



Description. The head, thorax and posterior portion of wing covers 

 black ; anterior portion of latter and legs brownish. The antennae are 

 slender, about as long as the body, thorax subpyriform, swollen anteriorly ; 

 sides nearly parallel, femora clubbed. This species may be distinguished 

 from its allies, according to Wickham, by the absence of narrow cross- 



