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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 \hz-Sphingidte 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 Halticini of Boreal America, by G. H. Horn, M. D., 

 158 PP- 3 plates, 1889 . . . . I./5 



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

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



Notes on the species of Dendroctomns 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 



Transactions of the American Entomological Society, vol. xvii, now 

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