The ichneumonids are parasitic wasps present in the majority of the ecosystems. In the State of Tamaulipas, México, they have been studied since 1981; two areas are best studied: the Biosphere Reserve “El Cielo” and part of the central zone of the state, near Victoria. The tribe Cryptini has 12 subtribes in Mexico. In this presentation, the composition of the Cryptini (8 subtribes) in these 2 areas of Tamaulipas and in the Lower Rio Grande Valley (LRGV) (recorded by Porter in 1977) are compared. Material was collected in Tamaulipas mainly with nets and Malaise traps; recently the first two authors described 40 new species of these subtribes. In Tamaulipas, 81 species are present: 58 of 8 subtribes in “El Cielo”, 52 of 6 subtribes in the vicinity of Victoria whereas in LRGV are only 14 species of 3 subtribes. The number of new species of each area are 29 (50% of the total) in “El Cielo”, 14 (27%) near Victoria, and 3 (21% - after Porter) in LRGV. In Victoria area, almost 50% are Cryptina, a predominantly Holarctic group. Only 7 species are present in all 3 areas: Gambrus ultimus, Trychosis subgracilis, Joppidium brochum, Lanugo picta, Diapetimorpha introita, D. macula and D. sphenos. These differences ocurr in a distance of 420 km, being “El Cielo” the richest area in vegetation and abundance of Cryptini species.