The present study updates previously published biodiversity/faunistics of the flea beetles of Mexico published by the author after examination of 6132 specimens from 8 institutional collections. The following 9 genera were selected as indicators of the effects of known diversity only through examination of museum specimens (i.e., indoor collecting"): Alagoasa Bechyne; Asphaera Chevrolat; Capraita Bechyne; Disonycha Chevrolat; Kuschelina Bechyne; Omophoita Chevrolat; Prasona Baly; Systena Chevrolat; and Walterianella Bechyne. From the specimens examined in these genera from the 8 collections, there were 394 new records for Mexican states of the 287 new species records representing 47% new records of the species recorded from those states. Total new state records 287 from 80 species. States with most new records: Chiapas (32); Nayarit (27); Sinaloa (24). 80 spp. (47%) with new state records. Systena oberthuri Baly is reported from Mexico for the first time. The current total of Alticinae in Mexico is 90 genera/626 species. The difficulties of the generic boundaries between Systena and Prasona, Alagoasa and Kuschelina; as well as the specific boundaries between A. jacobiana and A. decemguttatus and the specific level pattern variation in Disonycha glabrata and Alagoasa decemguttatus are discussed. Kuschelina semipurpurea, formerly placed in Alagoasa, is placed is considered as a new combination.
