INSECTS INFESTING THE APPLE TREE. 67 



outside bark, leaving the bark about the thickness of writing 

 paper ; it then draws back about an inch, places some coarse 

 chips before and behind it, and soon assumes the pupa form. 

 (Fig. 256). After remaining in this state for from two to six 

 weeks, it is changed to a beetle, which soon afterwards gnaws 

 a hole through the bark that covers the end of its Inirrow, and 

 thus effects its escape. The head of this grub is small, horny, 

 and brown ; the first ring or segment is much larger than the 

 others ; the next two are very short, as are also the eleventh 

 and twelfth ; the rings, from the fourth to the tenth, inclusive, 

 are each furnished on the upper side with two fleshy warts, 

 which are situated close together, and are destitute of the rasp- 

 like teeth which are usually found on the grubs of the other 

 kinds of borers ; no appearance of legs can be seen, even with 

 a magnifying glass of high power. When fully grown, it meas- 

 ures about one inch in length. 



The beetle, or perfect insect, measures from six to nine lines, 

 or one half to three fourths of an inch in length, and is of a 

 cinnamon-brown color, marked with two white stripes, which 

 extend from the head to the tips of the wing-cases ; the face, 

 antennic, and legs are white, the antennae being nearly as long 

 as the body. 



Remedy. — Use No. 37. 



CHAPTER XXIII. 



The Flat-headed Apple-tree Borer. (Cal.) 



( Chrysobothris femorata — Fabricius.) 



Order, Coleoptera ; Family, Buprestid^. 



[Boring into the trunks of apple, pear, peach, and simi- 

 lar trees ; a pale, yellowish, footless grub, ha\'ing the forepart 

 of the body greatly widened and flattened ; Anally transform- 

 ing into a greenish-black or bronze colored beetle, which is 

 copper-colored on the under side.] ^ 



While the round-headed apple-tree borer, S. hivitata (Fig. 

 25), usually infests healthy, growing trees, the present species 

 seems to prefer those which are more or less diseased, in such 



