“…In view of the aridity, high temperatures, and fluctuating prey density levels that often characterize desert ecosystems, the potential for intra-and interspecific competition is quite high (Dunham, 1980). Solpugids are a major component of the arachnid fauna inhabiting desert regions (Muma, 1951;Cloudsley-Thompson, 1977;Punzo, 1993Punzo, , 1994c. Although some information is available on the hunting behavior (Bolwig, 1952;Cloudlsey-Thompson, 1961;Muma, 1966;Wharton, 1987), diet (Punzo, 1994b(Punzo, , 1994c(Punzo, , 1994d and thermal requirements (Cloudsley-Thompson, 1977;Punzo, 1994a) of Solpugida, no studies have been conducted on the possible competitive interactions between sympatric species.…”