The arrangement (disposition and number) of bristles or setae on the body and appendages – of particular importance in the classification of Diptera and mites:

– by
The arrangement (disposition and number) of bristles or setae on the body and appendages – of particular importance in the classification of Diptera and mites:

A. Chaetotaxy
B. Chela
C. Chitin
D. Both b & c