108 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



Melanophila fulvoguttata Harris. — Maine, New Hampshire, Michigan, 

 West Virginia, North Carolina; mines inner bark and outer wood of 

 normal, injured, dying and dead trees; usually pupates in the bark; 

 spruce (Picea sp.), red spruce (P. riihens), hemlock {Tsuga canadensis); 

 flies from May to August; pupates from April to July; attacks and 

 kills many trees and seriously injures others; is the most destructive 

 enemy of the eastern hemlock as has been pointed out by Dr. Hopkins 

 in Bulletin 37 of the Bureau of Entomology. 



Melanophila calif ornica Van Dyke — Idaho, Oregon, California; 

 mines inner bark and outer wood of normal, injured, dying and dead 

 trees; pupates in bark and wood; yellow pine {Pinus ponderosa), 

 Jeffrey pine (d. jeffreyi), digger pine (P. sahiniana), coulter pine (P. 

 coulteri), monterey pine (d. radiata) knobcone pine (P. attenuaia); flies 

 from May to August; pupates from March to July; attacks and kills 

 many second gro-Hi:h trees and assists barkbeetles to kill others. 



Melanophila pini-edulis Burke — Colorado, Utah, Arizona; mines, 

 inner bark and outer wood of normal, injured, dying and dead trees; 

 pupates in outer wood; pinon {Pinus edulis); flies from June to Sep- 

 tember; pupates from June to July; assists barkborers and bark- 

 beetles to attack and kill trees. 



Melanophila intrusa Horn^ — Colorado, California; mines inner bark 

 and outer wood of injured, dying and dead trees; pupates in outer 

 wood; sugar pine {Pimis lamhertiaria) , yellow pine (P. ponderosa), 

 rock pine (P. scopidorum), knobcone pine (P. attenuata); flies from 

 June to July; pupates from March to June; usually lives in the sup- 

 pressed limbs of living trees but sometimes attacks saphngs, especially 

 those over-topped by larger trees. 



Melanophila cnieola Melsh.^ — West Virginia, North Carolina; mines 

 inner bark and outer wood of dying and dead trees; pupates in the 

 wood; scrub pine {Pinus virginiana), pine {Pinus sp.) ; flies from April 

 to August; infests overtopped branches and trees. 



Melanophila ohtusa Horn — One specimen from Georgia recorded by 

 Horn in his revision of the genus. No specimens have been collected 

 by us. 



