Abstract: According to the burrow flea index, body flea,burrow track flea of the Meriones unguiculatus and the six meteorological factors in Tumete plain, Inner Mongolia Autonomous Region during 1983～1985, it was found that ① there were eleven flea species, with Nosopsyllus laeviceps kuzenkovi (67.50%) as the dominant species, Neopsylla bidentatiformis (22.65%) came second ; ② the differences of the mean values among the three kinds flea index were significant (P<0.0001) ; ③ the correlation between the body flea and burrow track was significant (P<0.05), i.e,(burrow track flea index)=0.0049+0.0282(body flea index),the correlations between the burrow flea and the body flea and between the burrow flea and the burrow track flea were not significant (P>0.25) respectively;④ the correlation between the density of M. unguiculatus and the three kinds flea index was not significant (P>0.10);⑤ the monthly mean temperature was the only meteorological factor affecting the N.l kuzenkovi of the burrow flea(P<0.05);⑥the optimum regression subsets of multiple linear regression among the body flea (N. l. kuzenkovi and Xenopsylla conformis conformis) and the meteorological factors (P<0.003 and P<0.05),and among the burrow track flea (N. l. kuzenkovi and N. bidentatiformis) and the meteorological factors (P<0.0007 and P<0.01) were conducted, and the monthly evaporation was a main factor affecting the N. l. kuzenkovi of the body flea and the burrow track flea; ⑦ the differences in burrow flea indexes between spring and winter and between summer and winter were significant ( P<0.05), the differences in body flea indexes between spring and winter and between summer and winter were significant (P<0.05), the differences in burrow track flea indexes between spring and winter, between summer and autumn and between summer and winter were significant (P<0.05).

Key words: burrow flea, rat body flea, rat burrow track flea, Nosopsyllus laeviceps kuzenkovi, Meriones unguiculatus, meteorological factor