70 INSECTS INFESTING THE APPLE TREE. 



The beetles (Fig. 30) are found in their burrows from early 

 Fall till late in the following Spring. They measure from four 

 to five lines, or about three eighths of an inch in length ; are 

 of a dark brown color, the thorax nearly black, and the ante- 

 rior half is covered with spine-like points ; at the apex of each 

 Fig. 30. "^ ^^^^ wing-covers of the male is a little horn 



from which the species derives the specific 

 name: bicaudatus, or two-tailed. 



Fig. 30. — Apple-twig " Borer ; back view and 

 side view — color, brown. 

 Remedies. — If seriously infested, when the tree is dormant, 

 use Nos. 11 and 12 — one pound to each gallon of water used. 

 (Spray.) In the Spring when the tree is in leaf, use No. 5 or 

 7 — one pound to each gallon of water used. This will prevent 

 the insect from })oring into the tree. Also, prune as directed 

 in No. 27. 



CHAPTER XXV. 



The Prickly Bark Beetle. 



( Leptostijlus aculifcnis. — Say. ) 



Order, Coleoptera ; Family, CEKAMByrirxE. 



Living under the bark of apple trees, small, whitish, foot- 

 less grubs, similar in appearance to the young apple tree 

 borers, occurring sometimes in multitudes, forming, long, nar- 

 row, Avinding burrows upon the outer surface of the wood, 

 these burrows becoming broader as the worm increases in size ; 

 finally transforming into a rather short and thick brownish gray 

 beetle (Fig. 31) with small prickle-like points upon its wing-cov- 

 • ers, and back of their middle is a white curved, or V-shaped band, 

 „^ with a black streak on its hind edge ; length from 

 three to four lines, or about one third of an inch. The 

 perfect insect appearing the last of August. — Fitch. 



Fig. 31. — Prickly Bark Beetle — colors gray and 

 )lack. 



Pkmkdv. — I'se soap as directed in No. 37, in .Inly or early 

 in August. 



