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The Occurrence of Anopheles Crucians in Guatemala¹

In the course of an anopheline survey in connection with a program of testing antimalarial drugs in Guatemala, a new distributional record was obtained for Anopheles crucians crucians Wiedemann, 1828. Identification of the species, based on numerous larvae and reared adults, was confirmed by Dr. Alan Stone, Division of Insect Identification, United States National Museum.

Kumm (1) has given the localities in Central America where this species has been collected, all of which are on the Atlantic slope in British Honduras, Honduras and Nicaragua. The finding of A. crucians as reported here extends its Central American distribution to the Pacific slope as well as records it for the first time from Guatemala.

Anopheles crucians was found breeding prolifically as the dominant species in association with A. albimanus, A. argyritarsis and A. hectoris in a fairly large semi-permanent marsh in the narrow valley of the Michatoya River, four miles south of Amatitlan, Department of Guatemala, at an elevation of 3500 feet.

¹ The observations on which this article is based were conducted with the support of the Laboratory of Tropical Diseases of the Microbiological Institute, National Institutes of Health, Public Health Service, under the sponsorship of the Pan American Sanitary Bureau through a research grant from the Division of Research Grants and Fellowships of the National Institutes of Health.

² Medical Entomologist, Rocky Mountain Laboratory (Hamilton, Montana) of the Microbiological Institute, National Institutes of Health, on temporary assignment to the Laboratory of Tropical Diseases of the Microbiological Institute, National Institutes of Health.