The aim of the present study is showed the relationship between sorne non biotic   variable (orientation, altitude, temperature and precipitation) and four species of   triatonunes: Meccus pallidipennis, M. bassolsae, Triatoma barberi y T. dimidiata.   Practically afl the triatomines are vectors of Chagas diseases. This disease is   considering a main problem of health in so many Latin America countries since   there are 16 to 18 millions of cases. This study was developed between 2002/2003   in the Sierra Norte and Mixteca Poblana (Puebla, Mexico). In this geographic   region important populations of the vectors are existing. The relationship between the   triatomine species and the non biotic variables was determined by exploratory and   conformatory studies applying the techniques of multiple correspondence and   analysis lineal log. It was verified that Meccus pallidipennis are abundant at the   south orientation and low temperature, on the other hand, Triatoma di,nidiata is   associated to high temperature and north orientation. The relative humidity is an   independent factor, according on this study. The relation of the temperature to this   species seems to explain the presence of triatomine populations in this region.