306 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
KEY TO INSECT INJURIES BY SCOLYTIDAE AND PLATYPODIDAE—Continued 
Occurring in the bark, wood, or pith of the small branches and 
twigs of various hardwoods, with little regard to species 
Species of Hypothenemus and Stephanoderes, p. 327. 
23. Pinhole burrows in the wood not stained dark by ambrosial fungi__ 
Pinhole burrows extending into the wood and stained dark by 
ambrosial fungiec << sab DRE Cee § Sa ee 
24, Very small pinhole burrows in the living leaf-bearing twigs of pines, 
extending through the wood to the pith and continued there as 
egg galleries; entrance usually covered by pitch tube: 
In red pine twigs, Northern States 
Myeloborus fivazi Blkm, p. 331. 
In white pine twigs, Northern States 
Myeloborus ramiperda Sw.. p. 3381. 
In twigs of various eastern and southern pines 
Pityophthorus pulicarius Zimm., p. 331. 
Pinhole burrows in the wood or pith of dying or dead hardwoods, 
branching into several egg galleries in the sapwood or pith____ 
25. Small beetles with the rear end tapering to a point 
smalleibectles swith the ear end roundeds 22 ss sa ee 
26. Small beetles with the basal joint of the antenna flattened, ex- 
panded, and ornamented with long hairs: 
Breeding in the wood of willow and redbud; Maryland to 
California Micracis swatnei Blkm., p. 325. 
Breeding in poplar shoots; central New York 
Micracis populi Sw., p. 325. 
Breeding in redbud and other hardwoods; Maryland to 
Illinois Micracis suturalis Lee., p. 325. 
Breeding in willow and redbud; Virginia to Mississippi 
Micracis meridianus Blkm., p. 325. 
Breeding in pith of oaks, maple, etc.; Massachusetts to 
Kansas and south to Texas and Florida 
Micracis opacicollis Lee., p. 325. 
Breeding in pith of oaks, ete.; South Carolina to Texas 
Micracis nanula Lee., p. 325. 
Small beetles with the rear end acute and first joint of antenna 
normal: 
In wood of honeylocust, hackberry, and other hardwoods; 
Maryland to Texas___Hylocurus langstoni Blkm., p. 325. 
In wood of hickory, maple, etc.; Michigan to Georgia 
Hylocurus rudis Lec., p. 325. 
Known only from hickory wood: 
New York to North Carolina 
Hylocurus biorbis Blkm., p. 325. 
MUSSISSIppI== = == Hylocurus bicornis Blkm., p. 325. 
'Hylocurus harnedi Blkm., p. 325. 
Pennsylvania to North Carolina 
Hylocurus spadix Blkm., p. 325. 
27. Small dull yellowish-brown to black beetles; the basal joint of the 
antenna club-shaped with long hairs: 
Yellowish brown; from Pennsylvania to Florida and Texas, 
in oaks, hickory, and other hardwoods 
Thysanoes fimbricornis Lec., p. 326. 
Dark brown; in oaks and maples in Mississippi and Georgia 
Thysanoes lobdelli Blkm., p. 326. 
Dark brown; in elm and rattan vine from Virginia to Texas 
Thysanoes berschemiae Blkm., p. 326. 
Small, shining, reddish-brown beetles; wing covers coarsely, 
irregularly punctured; Massachusetts to Iowa and Mississippi 
in maple and hickory __-__- __Lymantor decipiens Lee., p. 326. 
28. In stained ambrosial burrows usually confined entirely to the sap- 
wood; common in wood of both coniferous and broadleaved 
trees 
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