340 



ECONOMIC ENTOMOLOGY 



Peach-tree Bark-beetle {PhthoropMocus liminaris Harris). — 

 (Consult Farmers' Bull. 763, U. S. Dept. Ag.) This native borer 

 cuts its tunnels between the bark and the wood of peach and cherry. 

 Two broods a year. Common in wild cherry in some localities. 



Adult. — Brownish-black, ^^fo inch 

 long; head large and visible from above; 

 antennal club lamellate, of three separate 

 laterally produced segments. Breeds in 

 weak and dying limbs, but in fall bores 



k 'b 



Fig. 221. — Galleries of the 

 fruit tree bark beetle on twig 

 under bark: a, a, main galleries; 



b, b, side or larval galleries; 



c. c, pupal cells. Natural size. 

 (Ralzeburg.) 



Fig. 222. — Shot-hole horer {Anisandrus 

 pyri). {After Swaine, Bui. 14, En,. Bur. 

 Can.) 



holes in healthy limbs from which much sap exudes following season. 

 Hibernates. 



-Egg-J. — Small, white; 80 to 160; laid in niches along sides of egg- 

 tunnel or brood chamber in spring. Hatch in 17-20 days. 



Larva. — White; head yelowish, mouth-parts dark; mature in 25-30 

 days. Form galleries off the egg-tunnel. 



Pup(B. — Formed in enlarged end of larval galleries; adults appear 

 through holes cut in the bark above the pupal cells; duration 4-6 days. 



Shot-hole Borer {Anisandrus pyri Peck). — This borer cuts round, 

 black tunnels deep into the wood; in smah branches or stems one divi- 

 sion of the tunnels partially girdles the wood (Fig. 222). 



Adult. — Cylindrical, black, 3-8 i^^ch long; antennal club globular 



