38 
Pith flecks in wood, birch, maple, etc. 
Diptera, Agromyzidae 
Pinholes, about 1, inch in size, of uniform diameter 
throughout, wood stained in streaks, in oaks and yeilow 
PODIAL: cn eNVRee eee ee ee Coleoptera, Scolytidae 
Holes tapering, several sizes grouped together and origin- 
ating in a wound: 
Holes up to 14 inch in diameter, in chestnut and 
chinaguapin = ene Coleoptera, Lymexylidae 
Holes up to 144 inch in diameter, in oak and other 
WO OGS in. retain eee ee ee Coleoptera, Brentidae 
Variable-sized holes grouped and radiating from wounds 
or cavities 
Coleoptera, Cerambycidae, Tenebrionidae, Brentidae 
Large grub holes, up to 1 inch in diameter, usually ap- 
pearing singly and not associated with wounds 
Invhickonyeie a Se ee Coleoptera, Cerambycidae, 
Lepidoptera, Cossidae 
In poplar and cottonwood 
Coleoptera, Cerambycidae, 
Lepidoptera, Cossidae, Aegeriidae 
In maple 
Coleoptera, Cerambycidae, Tenebrionidae, 
Lepidoptera, Cossidae, Aegeriidae 
Invashist s<wieceed. 40 eee iene Lepidoptera, Aegeriidae 
In| Persimmon ss 4¢ -aa eee Lepidoptera, Aegeriidae 
In lOCUSt eases oot. ok mene Lepidoptera, Cossidae, 
Coleoptera, Cerambycidae 
Pitch pockets in the wood 
Lepidoptera, Aegeriidae, Phycitidae 
Coleoptera, Scolytidae 
Holes filled with boring dust, associated with turpentine 
faces or fire scars : 
In: the:South, pines 2242... Coleoptera, Buprestidae 
In the North, pines or other conifers 
Coleoptera, Cerambycidae, Buprestidae 
B. Insects in Round Logs 
Sawdust exuding from small, round “pinholes” (1/10 inch 
or less in diameter) on the surface of the bark; wood 
usually stained around the holes 
Coleoptera, Scolytidae 
Sawdust exuding from larger holes; larvae present under 
the barksormin: woods. =. Coleoptera, Cerambycidae 
Sawdust not exuded; the only evidence of work is the 
presence of larvae or galleries under bark or in the 
wood 
Larvae elongate, cylindrical 
Coleoptera, Cerambycidae 
Larvae flat-headed .....................Coleoptera, Buprestidae 
Larvae curved, legless; only one larva to a burrow 
Coleoptera, Curculionidae 
