INSECTS AFFECTING PARK AND WOODLAND TREES 



669 



Blue horntail 



Paurunis cyaneus Fabr. 



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

 spruce and fir. 



This horntail is even rarer than the preceding and may be recognized 

 by its unicolorous antennae, the triangular 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, and it has likewise been 

 recorded as working in spruce and fir. 



Tetropium cinnamopterum Kirby 



A somewhat cylindric black or brownish 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 injured and 

 dying spruce trees in West Virginia. He states 

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

 the trees and causes rapid decay of the wood. 



Fig. 196 Tetropium cinna- 



Adults were taken by him in March and July. mopterum, enlarged (original; 



Phymatodes dimidiatus Kirby 

 A black, red-shouldered, flattened beetle about s / z e inch in length, occurs on spruce. 

 Examples 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- 



