(Bui. 2), Exp. Sta. of P. R. Sugar Producers' Assoc. 1912, pp, 

 15-22. 



23. Van Dine, D. L. — The Insects Affecting Sugar Cane in Porto 

 Rico. Journ. Eeon. Ent., Vol. 6, No. 2. 1913. pp. 251-257. 



24. Van Dine, D. L. — Report of the Entomologist. 3d Ann, Rpt. 

 (Bui. 5), Exp. Sta. of P. R. Sugar Producers' Assoc. 1913. pp. 

 25-46. 



25. Van Leenhoff, J. W. — Report of the Coffee Specialist. Rpt. 

 on Agric. Investigations in P. R., 1905. Bui. 171, Office of Exp. 

 Stas., U. S. Dept. Agric. 1906. pp. 42-47. 



16 



