Abstract
While engaged as entomologist to the Central Aguirre Sugar Company, owners of some 12,000 acres of sugar-cane lands situated on the south coast of Porto Rico, the writer continually recommended the importation into that island of certain larval parasites of Diatraea saccharalis, Fabricius (sugar-cane moth borer), as the one species indigenous to Porto Rico—Lixophaga (Euzenilliopsis) diatraeae, Townsend (Tachinidae)—alone, does not effect a sufficiently high percentage of control of the island's major sugar-cane pest.

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