360 SCOLYTID^. 



[LeConte. 



so above, rounded at tip; funicle of antennae stouter, more closely con- 

 nected with the club. 



Elytra with approximate, ill -defined rows of feeble 



punctures; declivity flattened in ^ with a few 



small acute granules; concave in 9 , with three 



or four prominent tubercles on the obtusely 



elevated margin 15. planicollis. 



1. X. tachygraphus, Zimm., Tr. Am. Ent. Soc. 1868, 440. 



Middle and Southern States. Received from Col. Motschulsky, under 

 the name Corthylus denticulatus. 



2. X. pyri Zimm., 1. c. 144 ; Scolytus pyri Peck., Mass. Agr. Journal, 

 1817, No. 3; Tomicus pyri Harris, Inj. Ins. ed. ult. 91. 



Eastern and Middle States. Sometimes quite injurious to pear trees. 



3. X. obesusLec., Trans. Am. Ent. Soc. 1868, 159. 

 Canada to Virginia. 



4. X. celsus Eichhoff, Berl. Ent. Zeitschr. 1867, 400 ; Zimm., Tr. Am. 

 Ent. Soc. 1868, 145. 



Middle and Southern States ; under oak bark. 



5. X. fuscatus Eichhoff, 1. c., 1867, 400 ; Zimm., 1. c. 1868, 145. 



Virginia to Texas : under oak bark. The nearly allied species men- 

 tioned by me as occurring under pine bark in Georgia seems not to differ 

 specifically from X. impretsus mentioned below. 



6. X. biographus Lee., Tr. Am. Ent. Soc. 1868, 160. 

 One specimen, Illinois. 



7. X. retusicollis Zimm., Tr. Am Ent. Soc. 1868, 146. 

 One specimen, Maryland ; under oak bark. 



8. X. xylographus Zimm., Tr. Am. Ent. Soc. 1868, 145 ; Bostrichux 

 xylogr. Say, Journ. Ac. Nat. Soc. Phil, v, 256; ed. Lee. ii, 318 : X. pint 

 Eichhoff, Berl. Ent Zeitschr. 1867, 401. 



Atlantic and Pacific districts ; under pine bark ; abundant. 



9. X. pubescensZimm., Tr. Am. Ent. Soc. 1868, 145. 

 Middle and Southern States. 



10. X. cselatus Zimm., Tr. Am. Ent. Soc. 1868, 146 ; Tomicus ccel. 

 Eichhoff, Berl. Ent. Zeitchr. 1867, 402; X. vicinus Lee., Tr. Am. Ent. 

 Soc. 1874, 72. 



Canada to Texas and California. In this and the four following species the 

 sensitive annulated surface of the club is larger than in the preceding species, 

 and the tibiae are more strongly serrate. The specimens from the Pacific 

 Coast do not differ sufficiently to warrant their being known as a distinct 

 species. 



11. X. impressus Eichhoff, Berl. Ent. Zeitschr. 1867, 400. 

 One specimen, Georgia ; under pine bark. 



12. X. sparsus Lee., Tr. Am. Ent. Soc. 1868, 160. 

 Canada and Lake Superior. 



