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Entomological Works for Sale. 



Classification of the Coleoptera of North America, by Drs. LeConte 

 and Horn, 567 pp. (Smithsonian Institution) ...... $2.50 



List of the Coleoptera of America, North of Mexico, by Samuel Hen- 

 shaw, 1885, 166 pp ............ 1.25 



First Supplement to the same, 1887 ....... .25 



Second Supplement to the same, 1889 . . . . . . . .25 



Monograph of the Sphingidcz of America North of Mexico, by John 

 B. Smith, 194 pp. 10 plates, 1888 ........ 2.00 



Synopsis of the Families and Genera of the Hymenoptera of America 

 North of Mexico, by E. T. Cresson. Parts i and 2 complete, 350 pp. 1887. 3.00 



Synopsis of the Hatticini of Boreal America, by G. H. Horn, M. D., 

 158 pp. '3 platt-s, 1889 ... . ... . 1.75 



The species of Heterocems and Ochthebius of Boreal America, by G. 

 H. Horn, M. D., 26pp. 2 plates, 1890. . . ..... 35 



Notes on the species of Dendroctomus of Boreal America, by \Y. 

 G. Dietz, M. D., 6pp., cuts, 1890 ......... 15 



Catalogue of the Coleoptera common to North America, Northern 

 Asia and Europe, by John Hamilton, M. D., 75 pp., 1889 ..... 75 



Revision of the species of Oncocnemis of temperate North America, 

 by John B. Smith, 29 pp., i plate, 1889 ....... .35 



Descriptions of some new species of Agrotis, by John B. Smith, 18 

 pp., 1890 ........ . . .25 



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