THE PINE INVESTIGATION. 



439 



116. Rhagium lineatum Olive. Very common bark borer in 

 dying and dead pine trees wherever the pine grows. Adults 

 collected May 9, Apr. 8, Oct. 7, and Dec. 19. 



117. Monohammus titillator Fab. Adults on pilch pine 

 cut in May '95,, Tibbs Run, near Dellslow, May 2, '95. Collected 

 on dying scrub pine trees in same locality, July 15, '93. 



Fig. LXXXV a, Galleries and larva, of buprestid in bark 

 of black spruce, showing destruction of colonies of Poly- 

 graphus ruftpennis. b, Galleries of Callidium antennatum 

 in outer surface of pine wood: Colonies of Scolytids de- 

 stroyed by it. 



118. Monohammus scutellatus Say. A common and destruc- 

 tive wood borer in dying and dead white pine. Brushy Run-. 

 May 5, and June 24, '92, Nuzums, Oct. 15, '91. 



119. Monohammus confusor Kir by. Common on spruce logs in 

 Skidway, Fig. XV11I, near Cheat bridge, Aug. 29, '90. 



120. Graphisurus pusillus Kirby. Adult collected on spruce 

 log, near Cheat Bridge, Aug 30, '90. 



121. Acanthocinus obsoletus Oliv. Bred from larva in outer 

 bark of pitch pine tree, killed by Dendroctonus frontalis, Tibbs 



