H. L. Keegan1
Dept. of Preventive Medicine, Medical Field Service School, Brooke Army Medical Center, Ft. Sam Houston, Texas
1. Distribution of L. hasseltii is reviewed and new collectionrecords from Corregidor Island, Panay, Luzon, and Tinian Islandare reported.
2. Taxonomic position of Latrodectus hasseltiiis discussedand a brief description of the species is given.
3. Effects of the venom of two Luzon specimens on a whitemouseand a guinea pig were similar to those reported by otherworkers.Symptoms produced by the bite of an adult female hasseltiiincludedconvulsive tremors, dyspnea and paralysis. The whitemouse died25 minutes after receiving a bite on the hind legand the guineapig died 45 minutes after being bitten on thesame area. Postmortemexamination revealed hemorrhages in lungs,body cavity and pericardium.