THE PINE INVESTIGATION. 



449 



181. Hylastes tennis Zimm.(=/7. gracilis Lee.) Rare. Taken 

 in swarm, May 4, '93, and breeding in bark of pine twigs kept 

 in basement of W. Va. Exp. Station building in '94. 



Fig. XC VI Galleries of Crypturgus pusillus in pitch pine. 



182. Hylurgops glabratus 7iM.(=Hylurqops pinifex Fitch.) 

 Very common in living, dying or dead bark at base of dying 

 trees and stumps. Infests yellow, scrub, pitch and white pine. 



183. 



Fig. XC VII Pitch pine needles, deformed by the pitch pine 

 needle gall fly, also perfect needle. 



Order DIPTERA : Family TACHINIDAE. 



Immature adult bred, from larvae which 



