ABSTRACT
Objective To investigate whether there is Blomia tropicalis breeding in the flour warehouse of food factory in a civil aviation airport,and,if there is,to observe the morphological structure of the mite. Methods The flour samples were col-lected from the flour warehouse of food factory in a civil aviation airport. The breeding mites were isolated from the samples by di-rect microscopy and made into specimens to observe with a light microscope. Results Female Blomia tropicalis was found in the collected flour samples. Under the microscope,the mite was nearly spherical,and it had no tergum and claw. Its apodemeⅠwas developed and connected in the midline. The reproductive hole was located between the foot Ⅲand IV level and was cov-ered with a pair of oblique genital folds. The footⅢandⅣhad no solenoids. The copulatory pouch was a long,slightly curved tube,extending from the end of the mite. Conclusions Blomia tropicalis has been found in the flour warehouse of a food factory in the civil aviation airport. The main distinguishing feature of this mite is that it has no tergum,its feet have no pectinate inferi-or tarsus scales or claw,the feetⅠgenu has only one solenidia,and feetⅢandⅣhave no solenidias.