252 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 6 



by the author in 1882/ thirty years ago. Dr. Stahl records the sugar- 

 cane weevil stalk-borer, Metamasius hemipterus Linn., under the name 

 Sphenophorus sericeus Latr. ; the southern grass-worm, Laphygjna 

 frugiperda S. & A.; and the mole-cricket, Scapteriscus didadylus Latr., 

 under the name, Gryllotalpa hexadadyla. 



Some seventeen years ago the insects affecting sugar cane in Porto 

 Rico were reported upon by Senor Fernando Lopez Tuero, director 

 of the local Agronomical Station of the Spanish Government, existing 

 at that time in the town of Rio Piedras.^ 



The moth stalk-borer, Diatrcea saccharalis Fabr., is recorded by 

 Senor Tuero under the common name of "borer" or "gusano de la 

 cana" and under the technical name of Tortrix sacrifaga. The mole- 

 cricket, Scapteriscus didadylus Latr., is discussed under the common 

 name of "la changa" and the scientific name Gryllotalpa sp. The 

 sugar cane mealy bug, Pseudococcus sacchari Ckll., is called the "piojo 

 de bolsa blanca" or "queresa" and is determined as Coccus sacchari. 

 The May beetle, Lachnosterna sp., of the sugar cane is recorded as 

 belonging to the group Melolonthides and is given the common name of 

 " caculo " and the white grub of the same is called the "gusano bianco." 

 The report deals with the habits of the insects, the nature of their 

 injury to the cane, their natural enemies, and the methods of control. 

 It is a most interesting and instructive discussion of the insects known 

 to affect sugar cane in Porto Rico at that time. At the end of the dis- 

 -cussion of the insects is given information on injury to cane by rats, 

 the history of the introduction of the mongoose to destroy the rats, 

 the injury by the land-crab, and by live-stock. On pages 105-123 

 of the report, under the title "Enfermedad de la Cana de Aziicar," 

 the history of the injury to cane by the white-grub of the May-beetle 

 is given and the results of extended investigations on the nature of 

 the injury and remedies are discussed. Altogether the report is a 

 valuable contribution to the subject of Porto Rican sugar-cane insects. 



Dr. W. Kruger records the West Indian sugar-cane leaf-hopper, 

 Delphax saccharivora Westw., from Porto Rico in a footnote on page 

 312 in his "Das Zuckerrohr und seine Kultur," published in 1889. 



In 1900 Mr. A. Busck^ records the mole-cricket under the common 

 name of "changa" and states that Dr Stahl of Bayamon determined 



1 A. Stahl. Fauna de Puerto-Rico. Clasificacion sistemdtica de los animales 

 que corresponden a esta fauna y catalogo del Gabinete Zoologico. 1882. Insectos, 

 pp. 82-102; 169-213. 



2 La Cana de Azucar en Puerto-Rico, su Cultivo y Enfermedad. Por Fernando 

 Lopez Tuero, Rio Piedras, 1895. Capitulo IV, Enemigos de la Cana y Modo de 

 Combatirlos, pp. 63-74. Enfermedad de la cana de azucar, pp. 105-123. 



' Notes on a Brief Trip to Puerto Rico in January and February, 1899. Bui. 22 

 (n. s.), Bur. Ent., U. S. Dept. Agr., 1900, pp. 88-93. 



