450 WEST VIRGINIA EXPERIMENT STATION. 



emerged from adult of Thanasimus dulius Aug. 12, '92 ; chang- 

 ed to pupa,- Aug. 13, '92. Adult emerged Aug. 28, '92. Beetle 

 collected on scrub pine near Dellslow, Aug. 10, '92. 



Fig. XCVIII, a, Work of the pitch pine twig tortrix. 6, 

 tube of the pine tube builder. 



Order DIPTERA : Family DOLICHOPODIDAE. 



184. Medeterus nigripes Loew. Common in larval mines of 

 Polygraphus rufipennis in black spruce, near Edra, May 6, '93. 

 Also common in mines of same species in Randolph, Tucker, 

 and^Grant^Counties. Evidently an enemy of the larva of the 

 bark ^beetle. 



