Comparison Study for the Features of Larvae Scarabaeoidea Community in Typical Habitats in Arid and Semiarid Areas

From 1998\_1999,we studied the features of Scarabaeoidea larvae community in dif ferent habitats. The results showed that: \%Serica orientalis\% Motschulsky is t he dominant species in all three sites. For different habitats, they have differ ent common species. In Inner Mongolia typical steppe, they are \%Trematodes tene brioides\% (Pallas) and \%Cyriopertha arcuata \%(Gebler). But for Horqin sandy l and and Tenger desert ecosystem, they are \%Anomala exoleta\% Faldermann, \%Hopl osternus incanus\% Motschulsky and \%Anomala exoleta\% Faldermann. From the res ults, we can essentially conclude that the Scarabaeoidea larvae community is ver y simple in Tenger desert ecosystem. In Horqin sandy land, the density of Scarab aeoidea larvae community is not higher than that of in Inner Mongolia typical steppe, but the number of species is higher than that in relative Inner Mongolia typical steppe. And the biodiversity indexes of Scarabaeoidea larvae community are highest for all three sites. Between Horqin sandy land and Inner Mongolia typical steppe, t he similarity index of Scarabaeoidea larvae community is higher than that of bet ween Horqin sandy land and Tenger desert ecosystem.