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Constructing compound burrows in various hardwoods .. 
In the sapwood of dying and recently dead hickories; 
cylindrical beetles 4 mm. or more in length 
Xyleborus celsus 
In the sapwood of various species of dying and dead 
hardwoods; beetles from 1 to 4 mm. long: 
In beech, birch, maple, oak, etc.; Northeastern States 
Anisandrus obesus 
In branches of apple, maple, etc.; Eastern States 
Anisandrus pyrt 
In small branches and twigs of maples and beech; 
Northeastern States? =. Anisandrus minor 
In stumps and logs of hardwoods in New Jersey, New 
York, Connecticut, and the upper Ohio Valley 
Xylosandrus germanus 
In narrow, black-stained burrows in various hardwoods; 
beetles small And Tslender te 2 oe es ee 
In notably coarser, black-stained burrows in har dwoods; 
beetles larger and much stouter: 
In birch, beech, maple, etc.; beetles brown to black 
Xyloterinus politus 
In poplars; Northeastern States; beetle with smoky 
yellow stripe on each wing cover 
Trypodendron retusum 
In various birches; Northeastern States; stripe of 
yellow on each wing cover 
Trypodendron betulae 
Beetles very slender, more than 3 times as long as wide; 
antennal funicle 2-jointed: 
Beetle reddish brown, wing covers all one color; in 
many Nard woods.) eee Monarthrum mali 
Beetle dark brown, wing covers with cross band of 
yellow; in many southern hardwoods 
Monarthrum fasciatum 
Beetles less than 3 times as long as wide; antennal 
funicle 5-jointed; in various hardwoods 
Xyleborus affinis, X. xylographus, X. fuscatus 
In rather narrow, compound, ambrosial burrows in the 
wood of decadent or felled conifers: 
In pine; Pennsylvania and New York 
Xyleborus howardi 
In pines/South Dakota’. = = Gnathotrichus aciculatus 
In pine, spruce, larch, balsam, etc.; in Eastern and 
Southeastern States Gnathotrichus materiarius 
In notably coarser, compound, ambrosial burrows in 
decadent and felled conifers; beetles stout, dark brown 
to black, marked with lighter brown or yellow; 
In pine; wing covers often with indistinct stripe of 
smoky brown or black 
Trypodendron scabricollis 
Flatheaded beetles making compound ambrosial burrows 
in southern hardwoods; beetles less than 5 mm. long: 
In hickories, oaks, gums, cypress, etc. 
Platypus compositus 
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