Electrophoretic techniques were used to characterize hexokinase (Hk) and phosphoglucomutase (Pgm) in the Anopheline mosquito, Anopheles albimanus Wiedemann. Two zones of hexokinase activity were detected, and inheritance studies were completed for Hk-1, the fastest migrating locus in zone 1. Hk-1 is tightly linked to reduced palmate on the left arm of chromosome 3. There was a single, discernible locus for Pgm and a total of 5 alleles was detected in laboratory stocks. Genetic crosses were conducted with 3 of these alleles, and the results indicated a loose linkage of these codominant alleles to Green larva (gl) on chromosome 2.