188 Cincinnati Society of Natural History. 
SCOLY TIDAL 
A large family, some of them very destructive to timber. 
PLATYPUS. 
P. compositus Say. 
MONARTHRUM. 
M. fasciatum Say. M. mali Fitch. 
PITYOPHTHORUS. 
P. pullus Zimin. 
HYPOTHENEMUS. 
H. eruditus West. 
XYLOTERUS, 
X. politus Say. 
XYLEBORUS. 
X. celsus Eich. X. pubescens Zimm. 
X. xylographus Say. X. celatus Etch. 
TOMICUS. 
T. calligraphus Germ. 
MICRACIS. 
M. rudis Lec. 
THYSANOES. 
T. fimbricornis Lec. 
SCOLYTUS. 
S. quadrispinosus Say. S. rugulosus Ritz. 
S. muticus Say. 
CHRAMESUS. 
C. seorize: Lec. 
PHLCOTRIBUS, 
P. liminaris Harris. P. frontalis Oliv. 
P. linunaris has been taken on the “bladder nut” (Staphylea 
trifoliata) by Prof. Hine. 
CNESINUS. 
C. strigicollis Lec. 
DENDROCTONUS. 
D. terebrans Lec. 
CRYPTURGUS. 
C. atomus Lec. 
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