INSECTS AFFECTINc; PARK AND WOODLAND TREES 267 



Banded hickory borer 

 Cliion ciiictus Drury 



A brownish beetle about i in< li in length, may be found on cut hickory the latter 

 part of May, the large, fleshy larvae or grubs making irregular, longitudinal burrows in 

 the wood. 



This species is more or less common wherever hickory throws, though 

 it seems to have received comparatively little attention from entomologists. 

 It works more particularly on cut timber, and wootl that has lain for a year 

 or two after felling, is frequently so full of galleries that its value, even 

 for firewood, is greatly diminished, while it is entirely worthless for other 



purposes. 



Description. The adult, according to Professor Osborn. is a grayish 

 !)rown beetle about i inch long, commonly with a yellowish, oblique band 

 on each wing cover, a mark sometimes absent. The thorax is cylindric, 

 with a sharp spine at each side and there are two at the extremity of each 

 wing. The antennae of the female are about as long as the body, while in 

 the male they are twice the insect's length. 



The full grown grub is fieshy, yellowish, with the thoracic segment 

 somewhat swollen. There are three pairs of very minute thoracic legs. 

 The boring is elliptic in cross section, and in some cases has a longer 

 diameter of >< inch, and may extend for 3 or 4 inches with the grain of the 



wood. 



Life histo.y and habits. The adult beetles issue about the latter part of 

 May, according to Professor Osborn, single females containing as man)- as 

 93 eggs. The insects display marked preference for cut timber. The 

 young grubs commence boring the wood at once and the life cycle is prob- 

 ably ''co^mpleted within two or three years, though instances are on record 

 where beetles hive issued from furniture, carriages etc., some years after 

 manufacture. This prolonged larval existence is probably abnormal. The 

 transformation from grub to pupa takes place the latter part of the wintc-r 

 or in the spring, occasionally as early as the first of January. The gallery 

 before and behind the insect is loosely filled with chips prior to the change. 



